XML 15 R1.htm IDEA: XBRL DOCUMENT
v3.23.1

N-2 - USD ($) |  |  |  | 3 Months Ended
--- | --- | --- | --- | ---
May 26, 2023 | May 25, 2023 | Apr. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021
Cover [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Entity Central Index Key |  | 0001332283 |  |  |  |  |  |  |  |  |  |  |
Amendment Flag |  | false |  |  |  |  |  |  |  |  |  |  |
Entity Inv Company Type |  | N-2 |  |  |  |  |  |  |  |  |  |  |
Securities Act File Number |  | 333-00000 |  |  |  |  |  |  |  |  |  |  |
Investment Company Act File Number |  | 811-21784 |  |  |  |  |  |  |  |  |  |  |
Document Type |  | N-2ASR |  |  |  |  |  |  |  |  |  |  |
Document Registration Statement |  | true |  |  |  |  |  |  |  |  |  |  |
Pre-Effective Amendment |  | false |  |  |  |  |  |  |  |  |  |  |
Post-Effective Amendment |  | false |  |  |  |  |  |  |  |  |  |  |
Investment Company Act Registration |  | true |  |  |  |  |  |  |  |  |  |  |
Investment Company Registration Amendment |  | true |  |  |  |  |  |  |  |  |  |  |
Investment Company Registration Amendment Number |  | 4 |  |  |  |  |  |  |  |  |  |  |
Entity Registrant Name |  | BlackRock Enhanced Equity Dividend Trust |  |  |  |  |  |  |  |  |  |  |
Entity Address, Address Line One |  | 100 Bellevue Parkway |  |  |  |  |  |  |  |  |  |  |
Entity Address, City or Town |  | Wilmington |  |  |  |  |  |  |  |  |  |  |
Entity Address, State or Province |  | DE |  |  |  |  |  |  |  |  |  |  |
Entity Address, Postal Zip Code |  | 19809 |  |  |  |  |  |  |  |  |  |  |
City Area Code |  | 800 |  |  |  |  |  |  |  |  |  |  |
Local Phone Number |  | 882-0052 |  |  |  |  |  |  |  |  |  |  |
Approximate Date of Commencement of Proposed Sale to Public |  | From time to time after the effective date of this Registration Statement. |  |  |  |  |  |  |  |  |  |  |
Dividend or Interest Reinvestment Plan Only |  | false |  |  |  |  |  |  |  |  |  |  |
Delayed or Continuous Offering |  | true |  |  |  |  |  |  |  |  |  |  |
Primary Shelf [Flag] |  | true |  |  |  |  |  |  |  |  |  |  |
Effective Upon Filing, 462(e) |  | true |  |  |  |  |  |  |  |  |  |  |
Additional Securities Effective, 413(b) |  | false |  |  |  |  |  |  |  |  |  |  |
Effective when Declared, Section 8(c) |  | false |  |  |  |  |  |  |  |  |  |  |
New Effective Date for Previous Filing |  | false |  |  |  |  |  |  |  |  |  |  |
Additional Securities. 462(b) |  | false |  |  |  |  |  |  |  |  |  |  |
No Substantive Changes, 462(c) |  | false |  |  |  |  |  |  |  |  |  |  |
Exhibits Only, 462(d) |  | false |  |  |  |  |  |  |  |  |  |  |
Registered Closed-End Fund [Flag] |  | true |  |  |  |  |  |  |  |  |  |  |
Business Development Company [Flag] |  | false |  |  |  |  |  |  |  |  |  |  |
Interval Fund [Flag] |  | false |  |  |  |  |  |  |  |  |  |  |
Primary Shelf Qualified [Flag] |  | true |  |  |  |  |  |  |  |  |  |  |
Entity Well-known Seasoned Issuer |  | Yes |  |  |  |  |  |  |  |  |  |  |
Entity Emerging Growth Company |  | false |  |  |  |  |  |  |  |  |  |  |
New CEF or BDC Registrant [Flag] |  | false |  |  |  |  |  |  |  |  |  |  |
Fee Table [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Shareholder Transaction Expenses [Table Text Block] |  |
Shareholder Transaction Expenses |  |  |  |
Sales load paid by you (as a percentage of offering price) (1) |  |  | 1.00 | %
Offering expenses borne by the Trust (as a percentage of offering price) (1) |  |  | 0.01 | %
Dividend reinvestment plan fees |  | $ | 0.02 per share for open-market purchases of common shares (2) |
(1) | If the common shares are sold to or through underwriters, the Prospectus Supplement will set forth any applicable sales load and the estimated offering expenses. Trust shareholders will pay all offering expenses involved with an offering.
(2) | The Reinvestment Plan Agent’s (as defined below under “Dividend Reinvestment Plan”) fees for the handling of the reinvestment of dividends will be paid by the Trust. However, you will pay a $ 0.02 per share fee incurred in connection with open-market purchases, which will be deducted from the value of the dividend. You will also be charged a $0.02 per share fee if you direct the Reinvestment Plan Agent to sell your common shares held in a dividend reinvestment account. Per share fees include any applicable brokerage commissions the Reinvestment Plan Agent is required to pay.
Sales Load [Percent] | [1] | 1.00% |  |  |  |  |  |  |  |  |  |  |
Dividend Reinvestment and Cash Purchase Fees | [2] | $ 0.02 |  |  |  |  |  |  |  |  |  |  |
Other Transaction Expenses [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Transaction Expense 1 [Percent] | [1] | 0.01% |  |  |  |  |  |  |  |  |  |  |
Annual Expenses [Table Text Block] |  |
Annual Expenses (as a percentage of net assets attributable to common shares) |  |  |  |
Management Fees (3),(4) |  |  | 0.80 | %
Other Expenses |  |  | 0.04 | %
Total Annual Fund Operating Expenses |  |  | 0.84 | %
Fee Waivers and/or Expense Reimbursements (4) |  |  | — |
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements (4) |  |  | 0.84 | %
(3) | The Trust currently pays the Advisor a monthly fee at an annual contractual investment management fee rate of 0.80% of the average weekly value of the Trust’s net assets.
(4) | The Trust and the Advisor have entered into a fee waiver agreement (the “Fee Waiver Agreement”), pursuant to which the Advisor has contractually agreed to waive the management fee with respect to any portion of the Trust’s assets attributable to investments in any equity and fixed-income mutual funds and exchange-traded funds (“ETFs”) managed by the Advisor or its affiliates that have a contractual management fee, through June 30, 2025. In addition, pursuant to the Fee Waiver Agreement, the Advisor has contractually agreed to waive its management fees by the amount of investment advisory fees the Trust pays to the Advisor indirectly through its investment in money market funds managed by the Advisor or its affiliates, through June 30, 2025. The Fee Waiver Agreement may be terminated at any time, without the payment of any penalty, only by the Trust (upon the vote of a majority of the Trustees who are not “interested persons” (as defined in the Investment Company Act of 1940, as amended (the “Investment Company Act”)) of the Trust (the “Independent Trustees”) or a majority of the outstanding voting securities of the Trust), upon 90 days’ written notice by the Trust to the Advisor.
Management Fees [Percent] | [3],[4] | 0.80% |  |  |  |  |  |  |  |  |  |  |
Other Annual Expenses [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Annual Expenses [Percent] |  | 0.04% |  |  |  |  |  |  |  |  |  |  |
Total Annual Expenses [Percent] |  | 0.84% |  |  |  |  |  |  |  |  |  |  |
Waivers and Reimbursements of Fees [Percent] | [3] |  |  |  |  |  |  |  |  |  |  |  |
Net Expense over Assets [Percent] | [3] | 0.84% |  |  |  |  |  |  |  |  |  |  |
Expense Example [Table Text Block] |  | The following example illustrates the expenses (including the sales load of $10 and offering costs of $0.12) that you would pay on a $1,000 investment in common shares, assuming (i) total net annual expenses of 0.84% of net assets attributable to common shares, and (ii) a 5% annual return:
|  | One Year |  |  | Three Years |  |  | Five Years |  |  | Ten Years |
Total expenses incurred |  | $ | 19 |  |  | $ | 37 |  |  | $ | 56 |  |  | $ | 113 |
The example should not be considered a representation of future expenses. The example assumes that the estimated “Other expenses” set forth in the Estimated Annual Expenses table are accurate and that all dividends and distributions are reinvested at NAV. Actual expenses may be greater or less than those assumed. Moreover, the Trust’s actual rate of return may be greater or less than the hypothetical 5% return shown in the example. |  |  |  |  |  |  |  |  |  |  |
Expense Example, Year 01 |  | $ 19 |  |  |  |  |  |  |  |  |  |  |
Expense Example, Years 1 to 3 |  | 37 |  |  |  |  |  |  |  |  |  |  |
Expense Example, Years 1 to 5 |  | 56 |  |  |  |  |  |  |  |  |  |  |
Expense Example, Years 1 to 10 |  | $ 113 |  |  |  |  |  |  |  |  |  |  |
Purpose of Fee Table , Note [Text Block] |  | The following example illustrates the expenses (including the sales load of $10 and offering costs of $0.12) that you would pay on a $1,000 investment in common shares, assuming (i) total net annual expenses of 0.84% of net assets attributable to common shares, and (ii) a 5% annual return: |  |  |  |  |  |  |  |  |  |  |
Basis of Transaction Fees, Note [Text Block] | [1] | as a percentage of offering price |  |  |  |  |  |  |  |  |  |  |
Other Transaction Fees, Note [Text Block] |  | The example should not be considered a representation of future expenses. The example assumes that the estimated “Other expenses” set forth in the Estimated Annual Expenses table are accurate and that all dividends and distributions are reinvested at NAV. Actual expenses may be greater or less than those assumed. Moreover, the Trust’s actual rate of return may be greater or less than the hypothetical 5% return shown in the example. |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Investment Objectives and Practices [Text Block] |  | THE TRUST’S INVESTMENTS Investment Objectives and Policies Please refer to the section of the Trust’s most recent annual report on Form N-CSR entitled “Investment Objectives, Policies and Risks—Investment Objectives and Policies—BlackRock Enhanced Equity Dividend Trust (BDJ)”, which is incorporated by reference herein, for a discussion of the Trust’s investment objectives and policies. Portfolio Contents and Techniques The Trust’s portfolio will be composed principally of the following investments. Additional information with respect to the Trust’s investment policies and restrictions and certain of the Trust’s portfolio investments is contained in the SAI. There is no guarantee the Trust will buy all of the types of securities or use all of the investment techniques that are described herein and in the SAI. Common Stock . Common stock generally represents an equity ownership interest in an issuer. Under normal market conditions, the Trust’s common stock portfolios will consist substantially of dividend-paying common stocks. Although common stocks have historically generated higher average total returns than fixed-income securities over the long term, common stocks also have experienced significantly more volatility in those returns. An adverse event, such as an unfavorable earnings report, may depress the value of a particular common stock held by the Trust. Also, prices of common stocks are sensitive to general movements in the stock market and a drop in the stock market may depress the price of common stocks to which the Trust has exposure. Common stock prices fluctuate for several reasons including changes in investors’ perceptions of the financial condition of an issuer or the general condition of the relevant stock market, or when political or economic events affecting the issuers occur. In addition, common stock prices may be particularly sensitive to rising interest rates, as the cost of capital rises and borrowing costs increase. Options . An option on a security is a contract that gives the holder of the option, in return for a premium, the right to buy from (in the case of a call) or sell to (in the case of a put) the writer of the option the security underlying the option at a specified exercise or “strike” price. The writer of an option on a security has the obligation upon exercise of the option to deliver the underlying security upon payment of the exercise price or to pay the exercise price upon delivery of the underlying security. Certain options, known as “American style” options may be exercised at any time during the term of the option. Other options, known as “European style” options, may be exercised only on the expiration date of the option. As the writer of an option, the Trust would effectively add leverage to its portfolio because, in addition to its total net assets, the Trust would be subject to investment exposure on the value of the assets underlying the option. If an option written by the Trust expires unexercised, the Trust realizes on the expiration date a capital gain equal to the premium received by the Trust at the time the option was written. If an option purchased by the Trust expires unexercised, the Trust realizes a capital loss equal to the premium paid. Prior to the earlier of exercise or expiration, an exchange-traded option may be closed out by an offsetting purchase or sale of an option of the same series (type, underlying security, exercise price and expiration). There can be no assurance, however, that a closing purchase or sale transaction can be effected when the Trust desires. The Trust may sell call or put options it has previously purchased, which could result in a net gain or loss depending on whether the amount realized on the sale is more or less than the premium and other transaction costs paid on the call or put option when purchased. The Trust will realize a capital gain from a closing purchase transaction if the cost of the closing transaction is less than the premium received from writing the option, or, if it is more, the Trust will realize a capital loss. If the premium received from a closing sale transaction is more than the premium paid to purchase the option, the Trust will realize a capital gain or, if it is less, the Trust will realize a capital loss. Net gains from the Trust’s options strategy will be short-term capital gains which, for U.S. federal income tax purposes, will constitute net investment company taxable income. Call Options . The Trust intends to follow a call options writing strategy intended to generate current gains from options premiums and to enhance the Trust’s risk-adjusted returns. The strategy involves writing both covered and other call options. A call option written by the Trust on a security is considered a covered call option where the Trust owns the security underlying the call option. Unlike a written covered call option, other written options will not provide the Trust with any potential appreciation on an underlying security to offset any loss the Trust may experience if the option is exercised. As the Trust writes covered call options on its portfolio, it may not be able to benefit from capital appreciation on the underlying securities, as the Trust will lose its ability from such capital appreciation to the extent that it writes covered call options and the securities on which it writes these options appreciate above the exercise prices of the options. Therefore, at times, the Advisor may choose to decrease the use of a covered call options writing strategy to the extent that it may negatively impact the Trust’s ability to benefit from capital appreciation. For any written call option where the Trust does not own the underlying security, the Trust may have an absolute and immediate right to acquire that security upon conversion or exchange of other securities held by the Trust without additional cash consideration or the Trust may hold a call on the same security where the exercise price of the call held is (i) equal to or less than the exercise price of the call written, or (ii) greater than the exercise price of the call written. The standard contract size for a single exchange-listed option is 100 shares of the common stock. There are four items needed to identify any option: (1) the underlying security, (2) the expiration month, (3) the strike price and (4) the type (call or put). For example, ten XYZ Co. October 40 call options provide the right to purchase 1,000 shares of XYZ Co. on or before a specified date in October at $40.00 per share. A call option whose strike price is above the current price of the underlying stock is called “out-of-the-money.” Most of the options that will be sold by the Trust are expected to be out-of-the-money, allowing for potential appreciation in addition to the proceeds from the sale of the option. An option whose strike price is below the current price of the underlying stock is called “in-the-money” and could be sold by the Trust as a defensive measure to protect against a possible decline in the underlying stock. The following is a conceptual example of a covered call transaction, making the following assumptions: (1) a common stock currently trading at $37.15 per share; (2) a six-month call option is written with a strike price of $40.00 ( i.e. , 7.7% higher than the current market price); and (3) the covered call writer receives $2.45 (or 6.6% of the common stock’s value) as a premium. This example is not meant to represent the performance of any actual common stock, option contract or the Trust itself and does not reflect any transaction costs of entering into or closing out the option position, which could increase losses or reduce gains from covered call transactions. Under this scenario, before giving effect to any change in the price of the stock, the covered call writer receives the premium, representing 6.6% of the common stock’s value, regardless of the stock’s performance over the six-month period until option expiration. If the stock remains unchanged, the option will expire and there would be a 6.6% return for the six-month period. See “Tax Matters—Taxation of the Trust—The Trust’s Investments.” If the stock were to decline in price by 6.6%, the strategy would “break-even” thus offering no gain or loss. If the stock were to climb to a price of $40.00 or above, the option would be exercised and the stock would return 7.7% coupled with the option premium of 6.6% for a total return of 14.3%. Under this scenario, the covered call writer would not benefit from any appreciation of the stock above $40.00, and thus be limited to a 14.3% total return. The premium from writing the covered call option serves to offset some of the unrealized loss on the stock in the event that the price of the stock declines, but if the stock were to decline more than 6.6% under this scenario, the covered call writer does not have protection from further declines and the stock could eventually become worthless. For conventional exchange-listed listed call options, the option’s expiration date can be up to nine months from the date the call options are first listed for trading. Longer-term call options can have expiration dates up to three years from the date of listing. It is anticipated that, under certain circumstances when deemed at the Advisor’s discretion to be in the best interest of the Trust, options that are written against Trust stock holdings will be repurchased in a closing transaction prior to the option’s expiration date, generating a gain or loss in the options. If the options were not to be repurchased, the option holder would exercise their rights and buy the stock from the Trust at the strike price if the stock traded at a higher price than the strike price. In general, when deemed at the Advisor’s discretion to be in the best interests of the Trust, the Trust may enter into transactions, including closing transactions, that would allow it to continue to hold its common stocks rather than allowing them to be called away by the option holders. Put Options . Put options are contracts that give the holder of the option, in return for a premium, the right to sell to the writer of the option the security underlying the option at a specified exercise price at any time during the term of the option. Put option strategies may produce a higher return than covered call writing, but may involve a higher degree of risk and potential volatility. The following is a conceptual example of a put transaction, making the following assumptions: (1) a common stock currently trading at $37.15 per share; (2) a six-month put option written with a strike price of $35.00 ( i.e. , 94.21% of the current market price); and (3) the writer receives $1.10 (or 2.96% of the common stock’s value) as a premium. This example is not meant to represent the performance of any actual common stock, option contract or the Trust itself and does not reflect any transaction costs of entering into or closing out the option position, which could increase losses or reduce gains from covered call transactions. Under this scenario, before giving effect to any change in the price of the stock, the put writer receives the premium, representing 2.96% of the common stock’s value, regardless of the stock’s performance over the six-month period until the option expires. If the stock remains unchanged, appreciates in value or declines less than 5.79% in value, the option will expire and there would be a 2.96% return for the six-month period. If the stock were to decline by 5.79% or more, the Trust would lose an amount equal to the amount by which the stock’s price declined minus the premium paid to the Trust. The stock’s price could lose its entire value, in which case the Trust would lose $33.90 ($35.00 minus $1.10). Options on Indices . The Trust may write index call and put options. Because “index options” includes both options on indices of securities and sectors of securities, all types of index options generally have similar characteristics. Index options differ from options on individual securities because (i) the exercise of an index option requires cash payments and does not involve the actual purchase or sale of securities, (ii) the holder of an index option has the right to receive cash upon exercise of the option if the level of the index upon which the option is based is greater, in the case of a call, or less, in the case of a put, than the exercise price of the option and (iii) index options reflect price fluctuations in a group of securities or segments of the securities market rather than price fluctuations in a single security. As the writer of an index call or put option, the Trust receives cash (the premium) from the purchaser. The purchaser of an index call option has the right to any appreciation in the value of the index over a fixed price (the exercise price) on or before a certain date in the future (the expiration date). The purchaser of an index put option has the right to any depreciation in the value of the index below a fixed price (the exercise price) on or before a certain date in the future (the expiration date). The Trust, in effect, agrees to sell the potential appreciation (in the case of a call) or accept the potential depreciation (in the case of a put) in the value of the relevant index in exchange for the premium. If, at or before expiration, the purchaser exercises the call or put option written by the Trust, the Trust will pay the purchaser the difference between the cash value of the index and the exercise price of the index option. The premium, the exercise price and the market value of the index determine the gain or loss realized by the Trust as the writer of the index call or put option. The Trust may execute a closing purchase transaction with respect to an index option it has sold and write another option (with either a different exercise price or expiration date or both). The Trust’s objective in entering into such a closing transaction will be to optimize net index option premiums. The cost of a closing transaction may reduce the net index option premiums realized from writing the index option. Limitation on Options Writing Strategy . The Trust may write put and call options, the notional amount of which would be approximately 50% to 60% of the Trust’s total assets, although this percentage may vary from time to time with market conditions. As the Trust writes covered calls over more of its portfolio, its ability to benefit from capital appreciation becomes more limited and the Trust will lose money to the extent that it writes call options that are not covered by securities in its portfolio and the securities or index on which it writes the option appreciates above the exercise price of the option by an amount that exceeds the exercise price of the option. The number of put and call options on securities the Trust can write is limited by the total assets the Trust holds and further limited by the fact that all options represent 100 share lots of the underlying common stock. In connection with its option writing strategy, the Trust will not write “naked” or uncovered put and call options. Furthermore, the Trust’s exchange-listed option transactions will be subject to limitations established by each of the exchanges, boards of trade or other trading facilities on which such options are traded and cleared. These limitations govern the maximum number of options in each class which may be written or purchased by a single investor or group of investors acting in concert, regardless of whether the options are written or purchased on the same or different exchanges, boards of trade or other trading facilities or are held or written in one or more accounts or through one or more brokers. Thus, the number of options which the Trust may write or purchase may be affected by options written or purchased by other investment advisory clients of the Advisor. An exchange, board of trade or other trading facility may order the liquidation of positions found to be in excess of these limits, and it may impose certain other sanctions. Strategic Transactions and Other Management Techniques . In addition to the options strategy discussed above, the Trust may use a variety of other investment management techniques and instruments. The Trust may purchase and sell futures contracts, enter into various interest rate transactions such as swaps, caps, floors or collars, currency transactions such as currency forward contracts, currency futures contracts, currency swaps or options on currency or currency futures and swap contracts (including, but not limited to, credit default swaps) and may purchase and sell exchange-listed and over-the-counter (“OTC”) put and call options on securities and swap contracts, financial indices and futures contracts and use other derivative instruments or management techniques (collectively, “Strategic Transactions”). These Strategic Transactions may be used for duration management and other risk management purposes, including to attempt to protect against possible changes in the market value of the Trust’s portfolio resulting from trends in the securities markets and changes in interest rates or to protect the Trust’s unrealized gains in the value of its portfolio securities, to facilitate the sale of portfolio securities for investment purposes, to establish a position in the securities markets as a temporary substitute for purchasing particular securities or to enhance income or gain. There is no particular strategy that requires use of one technique rather than another as the decision to use any particular strategy or instrument is a function of market conditions and the composition of the portfolio. The use of Strategic Transactions to enhance current income may be particularly speculative. The ability of the Trust to use Strategic Transactions successfully will depend on the Advisor’s ability to predict pertinent market movements as well as sufficient correlation among the instruments, which cannot be assured. The use of Strategic Transactions may result in losses greater than if they had not been used, may require the Trust to sell or purchase portfolio securities at inopportune times or for prices other than current market values, may limit the amount of appreciation the Trust can realize on an investment or may cause the Trust to hold a security that it might otherwise sell. Certain provisions of the Code may restrict or affect the ability of the Trust to engage in Strategic Transactions. In addition, the use of certain Strategic Transactions may give rise to taxable income and have certain other consequences. Other Investments . The Trust may invest up to 20% of its total assets in other investments. These investments may include equity securities of issuers that do not pay dividends. In addition, the Trust may, although it has no present intention to do so (except in connection with Strategic Transactions, short sales, repurchase agreements, reverse repurchase agreements, when issued or forward commitment transactions and similar investment strategies), engage in borrowings for investment purposes and/or issue preferred shares as leverage. For more information, see “Investment Policies and Techniques” and “Additional Risk Factors” in the SAI. Real Estate Investment Trusts ( “ REITs ” ) . REITs are subject to certain risks which differ from an investment in common stocks. REITs are financial vehicles that pool investors’ capital to purchase or finance real estate. REITs may concentrate their investments in specific geographic areas or in specific property types ( e.g. , hotels, shopping malls, residential complexes and office buildings). The market value of REIT shares and the ability of REITs to distribute income may be adversely affected by several factors, including rising interest rates, changes in the national, state and local economic climate and real estate conditions, perceptions of prospective tenants of the safety, convenience and attractiveness of the properties, the ability of the owners to provide adequate management, maintenance and insurance, the cost of complying with the Americans with Disabilities Act, increased competition from new properties, the impact of present or future environmental legislation and compliance with environmental laws, changes in real estate taxes and other operating expenses, adverse changes in governmental rules and fiscal policies, adverse changes in zoning laws and other factors beyond the control of the REIT issuers. In addition, distributions received by the Trust from REITs may consist of dividends, capital gains and/or return of capital. As REITs generally pay a higher rate of dividends (on a pre-tax basis) than operating companies, to the extent application of the Trust’s investment strategy results in the Trust investing in REIT shares, the percentage of the Trust’s dividend income received from REIT shares will likely exceed the percentage of the Trust’s portfolio which is comprised of REIT shares. There are three general categories of REITs: equity REITs, mortgage REITs and hybrid REITs. Equity REITs invest primarily in direct fee ownership or leasehold ownership of real property; they derive most of their income from rents. Mortgage REITs invest mostly in mortgages on real estate, which may secure construction, development or long-term loans, and the main source of their income is mortgage interest payments. Hybrid REITs hold both ownership and mortgage interests in real estate. Restricted and Illiquid Investments . The Trust may invest up to 10% of total assets in privately placed or restricted securities (including in Rule 144A securities, which are privately placed securities purchased by qualified institutional buyers), illiquid securities and securities in which no secondary market is readily available, including those of private companies. Liquidity of an investment relates to the ability to dispose easily of the investment and the price to be obtained upon disposition of the investment, which may be less than would be obtained for a comparable more liquid investment. “Illiquid investments” are investments which cannot be sold within seven days in the ordinary course of business at approximately the value used by the Trust in determining its NAV. Illiquid investments may trade at a discount from comparable, more liquid investments. Illiquid investments are subject to legal or contractual restrictions on disposition or lack an established secondary trading market. Investment of the Trust’s assets in illiquid investments may restrict the ability of the Trust to dispose of its investments in a timely fashion and for a fair price as well as its ability to take advantage of market opportunities. Short Sales. The Trust may make short sales of securities. A short sale is a transaction in which the Trust sells a security it does not own in anticipation that the market price of that security will decline. The Trust may make short sales to hedge positions, for duration and risk management, in order to maintain portfolio flexibility or to enhance income or gain. When the Trust makes a short sale, it must borrow the security sold short and deliver it to the broker-dealer through which it made the short sale as collateral for its obligation to deliver the security upon conclusion of the sale. The Trust may have to pay a fee to borrow particular securities and is often obligated to pay over to the securities lender any income, distributions or dividends received on such borrowed securities until it returns the security to the securities lender. The Trust’s obligation to replace the borrowed security will be secured by collateral deposited with the securities lender, usually cash, U.S. Government securities or other liquid assets. Depending on arrangements made with the securities lender regarding payment over of any income, distributions or dividends received by the Trust on such security, the Trust may not receive any payments (including interest) on its collateral deposited with such securities lender. If the price of the security sold short increases between the time of the short sale and the time the Trust replaces the borrowed security, the Trust will incur a loss; conversely, if the price declines, the Trust will realize a gain. Any gain will be decreased, and any loss increased, by the transaction costs described above. Although the Trust’s gain is limited to the price at which it sold the security short, its potential loss is theoretically unlimited. The Trust may also make short sales “against the box.” Short sales, even if covered, may represent a form of leverage and will create risks. In this type of short sale, at the time of the sale, the Trust owns or has the immediate and unconditional right to acquire at no additional cost the identical security. The Trust must comply with Rule 18f-4 under the Investment Company Act with respect to its short sale borrowings, which are considered derivatives transactions under the Rule. See “Additional Risk Factors—Risk Factors in Strategic Transactions and Derivatives—Rule 18f-4 Under the Investment Company Act” in the SAI. Short-Term Debt Securities; and Temporary Defensive Position . During periods in which the Advisor determines that it is temporarily unable to follow the Trust’s investment strategy or that it is impractical to do so or pending re-investment of proceeds received in connection with the sale of a security, the Trust may deviate from its investment strategy and invest all or any portion of its assets in cash or cash equivalents. The Advisor’s determination that it is temporarily unable to follow the Trust’s investment strategy or that it is impractical to do so will generally occur only in situations in which a market disruption event has occurred and where trading in the securities selected through application of the Trust’s investment strategy is extremely limited or absent. In such a case, shares of the Trust may be adversely affected and the Trust may not pursue or achieve its investment objectives. |  |  |  |  |  |  |  |  |  |  |
Risk Factors [Table Text Block] |  | RISKS The NAV and market price of, and dividends paid on, the common shares will fluctuate with and be affected by, among other things, the risks of investing in the Trust. General Risks Please refer to the section of the Trust’s most recent annual report on Form N-CSR entitled “Trust Investment Objectives, Policies and Risks—Risk Factors,” which is incorporated by reference herein, for a discussion of the general risks of investing in the Trust. Other Risks Counterparty Risk The Trust will be subject to credit risk with respect to the counterparties to the derivative contracts purchased by the Trust. Because derivative transactions in which the Trust may engage may involve instruments that are not traded on an exchange or cleared through a central counterparty but are instead traded between counterparties based on contractual relationships, the Trust is subject to the risk that a counterparty will not perform its obligations under the related contracts. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, the Trust may experience significant delays in obtaining any recovery in bankruptcy or other reorganization proceedings. The Trust may obtain only a limited recovery, or may obtain no recovery, in such circumstances. Although the Trust intends to enter into transactions only with counterparties that the Advisor believes to be creditworthy, there can be no assurance that, as a result, a counterparty will not default and that the Trust will not sustain a loss on a transaction. In the event of the counterparty’s bankruptcy or insolvency, the Trust’s collateral may be subject to the conflicting claims of the counterparty’s creditors, and the Trust may be exposed to the risk of a court treating the Trust as a general unsecured creditor of the counterparty, rather than as the owner of the collateral. The counterparty risk for cleared derivatives is generally lower than for uncleared OTC derivative transactions since generally a clearing organization becomes substituted for each counterparty to a cleared derivative contract and, in effect, guarantees the parties’ performance under the contract as each party to a trade looks only to the clearing organization for performance of financial obligations under the derivative contract. However, there can be no assurance that a clearing organization, or its members, will satisfy its obligations to the Trust, or that the Trust would be able to recover the full amount of assets deposited on its behalf with the clearing organization in the event of the default by the clearing organization or the Trust’s clearing broker. In addition, cleared derivative transactions benefit from daily marking-to-market and settlement, and segregation and minimum capital requirements applicable to intermediaries. Uncleared OTC derivative transactions generally do not benefit from such protections. This exposes the Trust to the risk that a counterparty will not settle a transaction in accordance with its terms and conditions because of a dispute over the terms of the contract (whether or not bona fide) or because of a credit or liquidity problem, thus causing the Trust to suffer a loss. Such “counterparty risk” is accentuated for contracts with longer maturities where events may intervene to prevent settlement, or where the Trust has concentrated its transactions with a single or small group of counterparties. In addition, the Trust is subject to the risk that issuers of the instruments in which it invests and trades may default on their obligations under those instruments, and that certain events may occur that have an immediate and significant adverse effect on the value of those instruments. There can be no assurance that an issuer of an instrument in which the Trust invests will not default, or that an event that has an immediate and significant adverse effect on the value of an instrument will not occur, and that the Trust will not sustain a loss on a transaction as a result. Defensive Investing Risk For defensive purposes, the Trust may allocate assets into cash or short-term fixed-income securities without limitation. In doing so, the Trust may succeed in avoiding losses but may otherwise fail to achieve its investment objectives. Further, the value of short-term fixed-income securities may be affected by changing interest rates and by changes in credit ratings of the investments. If the Trust holds cash uninvested it will be subject to the credit risk of the depository institution holding the cash. Issuer Risk The value of a security may decline for a number of reasons which directly relate to the issuer, such as management performance, financial leverage, reduced demand for the issuer’s goods and services, historical and prospective earnings of the issuer and the value of the assets of the issuer. The amount of a dividend may decline for reasons related to an issuer, such as changes in an issuer’s financial condition or a decision by the issuer to pay a lower dividend. Inflation Risk Inflation risk is the risk that the value of assets or income from investment will be worth less in the future, as inflation decreases the value of money. Inflation rates may change frequently and drastically as a result of various factors, including unexpected shifts in the domestic or global economy. As inflation increases, the real value of the common shares and distributions on those shares can decline. In addition, during any periods of rising inflation, interest rates on any borrowings by the Trust would likely increase, which would tend to further reduce returns to the holders of common shares. Deflation Risk Deflation risk is the risk that prices throughout the economy decline over time, which may have an adverse effect on the market valuation of companies, their assets and their revenues. In addition, deflation may have an adverse effect on the creditworthiness of issuers and may make issuer default more likely, which may result in a decline in the value of the Trust’s portfolio. Legal, Tax and Regulatory Risks Legal, tax and regulatory changes could occur that may have material adverse effects on the Trust. To qualify for the favorable U.S. federal income tax treatment generally accorded to RICs, the Trust must, among other things, derive in each taxable year at least 90% of its gross income from certain prescribed sources and distribute for each taxable year at least 90% of its “investment company taxable income” (generally, ordinary income plus the excess, if any, of net short-term capital gain over net long-term capital loss). If for any taxable year the Trust does not qualify as a RIC, all of its taxable income for that year (including its net capital gain) would be subject to tax at regular corporate rates without any deduction for distributions to shareholders, and such distributions would be taxable as ordinary dividends to the extent of the Trust’s current and accumulated earnings and profits. The Biden presidential administration has called for significant changes to U.S. fiscal, tax, trade, healthcare, immigration, foreign, and government regulatory policy. In this regard, there is significant uncertainty with respect to legislation, regulation and government policy at the federal level, as well as the state and local levels. Recent events have created a climate of heightened uncertainty and introduced new and difficult-to-quantify macroeconomic and political risks with potentially far-reaching implications. There has been a corresponding meaningful increase in the uncertainty surrounding interest rates, inflation, foreign exchange rates, trade volumes and fiscal and monetary policy. To the extent the U.S. Congress or the current presidential administration implements changes to U.S. policy, those changes may impact, among other things, the U.S. and global economy, international trade and relations, unemployment, immigration, corporate taxes, healthcare, the U.S. regulatory environment, inflation and other areas. Although the Trust cannot predict the impact, if any, of these changes to the Trust’s business, they could adversely affect the Trust’s business, financial condition, operating results and cash flows. Until the Trust knows what policy changes are made and how those changes impact the Trust’s business and the business of the Trust’s competitors over the long term, the Trust will not know if, overall, the Trust will benefit from them or be negatively affected by them. The rules dealing with U.S. federal income taxation are constantly under review by persons involved in the legislative process and by the Internal Revenue Service (“IRS”) and the U.S. Treasury Department. Revisions in U.S. federal tax laws and interpretations of these laws could adversely affect the tax consequences of your investment. LIBOR Risk The Trust may be exposed to financial instruments that are tied to the London Interbank Offered Rate (“LIBOR”) to determine payment obligations, financing terms, hedging strategies or investment value. The Trust’s investments may pay interest at floating rates based on LIBOR or may be subject to interest caps or floors based on LIBOR. The Trust may also obtain financing at floating rates based on LIBOR. Derivative instruments utilized by the Trust may also reference LIBOR. The United Kingdom’s Financial Conduct Authority announced a phase out of LIBOR such that after June 30, 2023, the overnight, 1-month, 3-month, 6-month and 12-month U.S. dollar LIBOR settings will cease to be published or will no longer be representative. All other LIBOR settings and certain other interbank offered rates, such as the Euro Overnight Index Average, ceased to be published or representative after December 31, 2021. The Secured Overnight Financing Rate (“SOFR”) is a broad measure of the cost of borrowing cash overnight collateralized by U.S. Treasury securities in the repurchase agreement (“repo”) market and has been used increasingly on a voluntary basis in new instruments and transactions. On December 16, 2022, the Federal Reserve Board adopted regulations implementing the Adjustable Interest Rate Act, which provides a statutory fallback mechanism to replace LIBOR, by identifying benchmark rates based on SOFR that will replace LIBOR in certain financial contracts after June 30, 2023. These regulations apply only to contracts governed by U.S. law, among other limitations. The regulations include provisions that (i) provide a safe harbor for selection or use of a replacement benchmark rate selected by the Federal Reserve Board; (ii) clarify who may choose the replacement benchmark rate selected by the Federal Reserve Board; and (iii) ensure that contracts adopting a replacement benchmark rate selected by the Federal Reserve Board will not be interrupted or terminated following the replacement of LIBOR. Neither the effect of the LIBOR transition process nor its ultimate success can yet be known. While some existing LIBOR-based instruments may contemplate a scenario where LIBOR is no longer available by providing for an alternative rate-setting methodology, there may be significant uncertainty regarding the effectiveness of any such alternative methodologies to replicate LIBOR. Not all existing LIBOR-based instruments may have alternative rate-setting provisions and there remains uncertainty regarding the willingness and ability of issuers to add alternative rate-setting provisions in certain existing instruments. Parties to contracts, securities or other instruments using LIBOR may disagree on transition rates or the application of transition regulation, potentially resulting in uncertainty of performance and the possibility of litigation. The Trust may have instruments linked to other interbank offered rates that may also cease to be published in the future. Risk Associated with Recent Market Events While interest rates have been historically low in recent years in the United States and abroad, inflation rates have recently risen significantly and the Federal Reserve and other central banks have recently begun raising interest rates to address inflation which, among other factors, has led to markets to experiencing high volatility. A significant increase in interest rates may cause a further decline in the market for equity securities and could lead to a recession. Further, regulators have expressed concern that rate increases may contribute to price volatility. The impact of inflation and the recent actions of the Federal Reserve have led to market volatility and may negatively affect the value of debt instruments held by the Trust and result in a negative impact on the Trust’s performance. See “Risks—Inflation Risk.” In addition, the current contentious domestic political environment, as well as political and diplomatic events in the United States and abroad, such as presidential elections in the United States or the U.S. government’s inability at times to agree on a long-term budget and deficit reduction plan, has in the past resulted, and may in the future result, in adverse consequences (including a government shutdown) to the U.S. regulatory landscape, the general market environment and/or investment sentiment, which could negatively impact the Trust’s investments and operations. Such adverse consequences may affect investor and/or consumer confidence and may adversely impact financial markets and the broader economy, potentially to a significant degree. In recent years, some countries, including the United States, have adopted and/or are considering the adoption of more protectionist trade policies. A rise in protectionist trade policies, and the possibility of changes to some international trade agreements, could affect the economies of many nations in ways that cannot necessarily be foreseen at the present time. In addition, geopolitical and other risks, including environmental and public health, may add to instability in world economies and markets generally. Economies and financial markets throughout the world are becoming increasingly interconnected. As a result, whether or not the Trust invests in securities of issuers located in or with significant exposure to countries experiencing economic, political and/or financial difficulties, the value and liquidity of the Trust’s investments may be negatively affected by such events. An outbreak of an infectious coronavirus (COVID-19) that was first detected in December 2019 developed into a global pandemic that has resulted in numerous disruptions in the market and has had significant economic impact leaving general concern and uncertainty. Although vaccines have been developed and approved for use by various governments, the duration of the pandemic and its effects cannot be predicted with certainty. The impact of this coronavirus, and other epidemics and pandemics that may arise in the future, could affect the economies of many nations, individual companies and the market in general ways that cannot necessarily be foreseen at the present time. Economic and Monetary Union (“EMU”) and Redenomination Risk As the European debt crisis progressed, the possibility of one or more Eurozone countries exiting the EMU, or even the collapse of the Euro as a common currency, arose, creating significant volatility at times in currency and financial markets generally. The effects of the collapse of the Euro, or of the exit of one or more countries from the EMU, on the U.S. and global economy and securities markets are impossible to predict and any such events could have a significant adverse impact on the value and risk profile of the Trust’s portfolio. Any partial or complete dissolution of the EMU could have significant adverse effects on currency and financial markets, and on the values of the Trust’s portfolio investments. If one or more EMU countries were to stop using the Euro as its primary currency, the Trust’s investments in such countries may be redenominated into a different or newly adopted currency. As a result, the value of those investments could decline significantly and unpredictably. In addition, securities or other investments that are redenominated may be subject to foreign currency risk, illiquidity risk and valuation risk to a greater extent than similar investments currently denominated in Euros. To the extent a currency used for redenomination purposes is not specified in respect of certain EMU-related investments, or should the Euro cease to be used entirely, the currency in which such investments are denominated may be unclear, making such investments particularly difficult to value or dispose of. The Trust may incur additional expenses to the extent it is required to seek judicial or other clarification of the denomination or value of such securities. Market Disruption and Geopolitical Risk The occurrence of events similar to those in recent years, such as the aftermath of the war in Iraq, instability in Afghanistan, Pakistan, Egypt, Libya, Syria, Russia, Ukraine and the Middle East, new and ongoing epidemics and pandemics of infectious diseases and other global health events, natural/environmental disasters, terrorist attacks in the United States and around the world, social and political discord, debt crises (such as the Greek crisis), sovereign debt downgrades, increasingly strained relations between the United States and a number of foreign countries, including historical adversaries, such as North Korea, Iran, China and Russia, and the international community generally, new and continued political unrest in various countries, such as Venezuela and Spain, the exit or potential exit of one or more countries from the European Union (“EU”) or the European Monetary Union, continued changes in the balance of political power among and within the branches of the U.S. government, among others, may result in market volatility, may have long term effects on the U.S. and worldwide financial markets, and may cause further economic uncertainties in the United States and worldwide. Russia launched a large-scale invasion of Ukraine on February 24, 2022. The extent and duration of the military action, resulting sanctions and resulting future market disruptions, including declines in its stock markets and the value of the ruble against the U.S. dollar, in the region are impossible to predict, but could be significant. Any such disruptions caused by Russian military action or other actions (including cyberattacks and espionage) or resulting actual and threatened responses to such activity, including purchasing and financing restrictions, boycotts or changes in consumer or purchaser preferences, sanctions, tariffs or cyberattacks on the Russian government, Russian companies or Russian individuals, including politicians, could have a severe adverse effect on Russia and the European region, including significant negative impacts on the Russian economy, the European economy and the markets for certain securities and commodities, such as oil and natural gas, and may likely have collateral impacts on such sectors globally as well as other sectors. How long such military action and related events will last cannot be predicted. China and the United States have each imposed tariffs on the other country’s products. These actions may cause a significant reduction in international trade, the oversupply of certain manufactured goods, substantial price reductions of goods and possible failure of individual companies and/or large segments of China’s export industry, which could have a negative impact on the Trust’s performance. U.S. companies that source material and goods from China and those that make large amounts of sales in China would be particularly vulnerable to an escalation of trade tensions. Uncertainty regarding the outcome of the trade tensions and the potential for a trade war could cause the U.S. dollar to decline against safe haven currencies, such as the Japanese yen and the euro. Events such as these and their consequences are difficult to predict and it is unclear whether further tariffs may be imposed or other escalating actions may be taken in the future. On January 31, 2020, the United Kingdom (“UK”) officially withdrew from the EU (commonly known as “Brexit”). The UK and EU reached a preliminary trade agreement, which became effective on January 1, 2021, regarding the terms of their future trading relationship relating principally to the trading of goods; however, negotiations are ongoing for matters not covered by the agreement, such as the trade of financial services. Due to uncertainty of the current political environment, it is not possible to foresee the form or nature of the future trading relationship between the UK and the EU. The longer term economic, legal, political and social framework to be put in place between the UK and the EU remains unclear and the ongoing political and economic uncertainty and periods of exacerbated volatility in both the UK and in wider European markets may continue for some time. In particular, Brexit may lead to a call for similar referendums in other European jurisdictions which may cause increased economic volatility in the European and global markets and may destabilize some or all of the other EU member countries. This uncertainty may have an adverse effect on the economy generally and on the ability of the Trust and its investments to execute their respective strategies, to receive attractive returns and/or to exit certain investments at an advantageous time or price. In particular, currency volatility may mean that the returns of the Trust and its investments are adversely affected by market movements and may make it more difficult, or more expensive, if the Trust elects to execute currency hedges. Potential decline in the value of the British Pound and/or the Euro against other currencies, along with the potential downgrading of the UK’s sovereign credit rating, may also have an impact on the performance of portfolio companies or investments located in the UK or Europe. In light of the above, no definitive assessment can currently be made regarding the impact that Brexit will have on the Trust, its investments or its organization more generally. Cybersecurity incidents affecting particular companies or industries may adversely affect the economies of particular countries, regions or parts of the world in which the Trust invests. The occurrence of any of these above events could have a significant adverse impact on the value and risk profile of the Trust’s portfolio. The Trust does not know how long the securities markets may be affected by similar events and cannot predict the effects of similar events in the future on the U.S. economy and securities markets. There can be no assurance that similar events and other market disruptions will not have other material and adverse implications. Regulation and Government Intervention Risk Federal, state, and other governments, their regulatory agencies or self-regulatory organizations may take actions that affect the regulation of the issuers in which the Trust invests in ways that are unforeseeable. Legislation or regulation may also change the way in which the Trust is regulated. Such legislation or regulation could limit or preclude the Trust’s ability to achieve its investment objectives. In light of popular, political and judicial focus on finance related consumer protection, financial institution practices are also subject to greater scrutiny and criticism generally. In the case of transactions between financial institutions and the general public, there may be a greater tendency toward strict interpretation of terms and legal rights in favor of the consuming public, particularly where there is a real or perceived disparity in risk allocation and/or where consumers are perceived as not having had an opportunity to exercise informed consent to the transaction. In the event of conflicting interests between retail investors holding common shares of a closed-end investment company such as the Trust and a large financial institution, a court may similarly seek to strictly interpret terms and legal rights in favor of retail investors. The Trust may be affected by governmental action in ways that are not foreseeable, and there is a possibility that such actions could have a significant adverse effect on the Trust and its ability to achieve its investment objectives. Investment Company Act Regulations . The Trust is a registered closed-end management investment company and as such is subject to regulations under the Investment Company Act. Generally speaking, any contract or provision thereof that is made, or where performance involves a violation of the Investment Company Act or any rule or regulation thereunder is unenforceable by either party unless a court finds otherwise. Failures of Futures Commission Merchants and Clearing Organizations Risk The Trust is required to deposit funds to margin open positions in cleared derivative instruments (both futures and swaps) with a clearing broker registered as a “futures commission merchant” (“FCM”). The Commodity Exchange Act (“CEA”) requires an FCM to segregate all funds received from customers with respect to any orders for the purchase or sale of U.S. domestic futures contracts and cleared swaps from the FCM’s proprietary assets. Similarly, the CEA requires each FCM to hold in a separate secure account all funds received from customers with respect to any orders for the purchase or sale of foreign futures contracts and segregate any such funds from the funds received with respect to domestic futures contracts. However, all funds and other property received by an FCM from its customers are held by an FCM on a commingled basis in an omnibus account and amounts in excess of assets posted to the clearing organization may be invested by an FCM in certain instruments permitted under the applicable regulation. There is a risk that assets deposited by the Trust with any FCM as margin for futures contracts or commodity options may, in certain circumstances, be used to satisfy losses of other clients of the Trust’s FCM. In addition, the assets of the Trust posted as margin against both swaps and futures contracts may not be fully protected in the event of the FCM’s bankruptcy. Regulation as a “Commodity Pool” The Commodity Futures Trading Commission (“CFTC”) subjects advisers to registered investment companies to regulation by the CFTC if a fund that is advised by the investment adviser either (i) invests, directly or indirectly, more than a prescribed level of its liquidation value in CFTC-regulated futures, options and swaps (“CFTC Derivatives”), or (ii) markets itself as providing investment exposure to such instruments. To the extent the Trust uses CFTC Derivatives, it intends to do so below such prescribed levels and will not market itself as a “commodity pool” or a vehicle for trading such instruments. Accordingly, the Advisor has claimed an exclusion from the definition of the term “commodity pool operator” under the CEA pursuant to Rule 4.5 under the CEA. The Advisor is not, therefore, subject to registration or regulation as a “commodity pool operator” under the CEA in respect of the Trust. Decision-Making Authority Risk Investors have no authority to make decisions or to exercise business discretion on behalf of the Trust, except as set forth in the Trust’s governing documents. The authority for all such decisions is generally delegated to the Board, which in turn, has delegated the day-to-day management of the Trust’s investment activities to the Advisor, subject to oversight by the Board. Management Risk The Trust is subject to management risk because it is an actively managed investment portfolio. The Advisor and the individual portfolio managers will apply investment techniques and risk analyses in making investment decisions for the Trust, but there can be no guarantee that these will produce the desired results. The Trust may be subject to a relatively high level of management risk because the Trust may invest in derivative instruments, which may be highly specialized instruments that require investment techniques and risk analyses different from those associated with equities and bonds. Reliance on the Advisor Risk The Trust is dependent upon services and resources provided by the Advisor, and therefore the Advisor’s parent, BlackRock. The Advisor is not required to devote its full time to the business of the Trust and there is no guarantee or requirement that any investment professional or other employee of the Advisor will allocate a substantial portion of his or her time to the Trust. The loss of one or more individuals involved with the Advisor could have a material adverse effect on the performance or the continued operation of the Trust. For additional information on the Advisor and BlackRock, see “Management of the Trust—Investment Advisor.” Reliance on Service Providers Risk The Trust must rely upon the performance of service providers to perform certain functions, which may include functions that are integral to the Trust’s operations and financial performance. Failure by any service provider to carry out its obligations to the Trust in accordance with the terms of its appointment, to exercise due care and skill or to perform its obligations to the Trust at all as a result of insolvency, bankruptcy or other causes could have a material adverse effect on the Trust’s performance and returns to shareholders. The termination of the Trust’s relationship with any service provider, or any delay in appointing a replacement for such service provider, could materially disrupt the business of the Trust and could have a material adverse effect on the Trust’s performance and returns to shareholders. Information Technology Systems Risk The Trust is dependent on the Advisor for certain management services as well as back-office functions. The Advisor depends on information technology systems in order to assess investment opportunities, strategies and markets and to monitor and control risks for the Trust. It is possible that a failure of some kind which causes disruptions to these information technology systems could materially limit the Advisor’s ability to adequately assess and adjust investments, formulate strategies and provide adequate risk control. Any such information technology-related difficulty could harm the performance of the Trust. Further, failure of the back-office functions of the Advisor to process trades in a timely fashion could prejudice the investment performance of the Trust. Cyber Security Risk With the increased use of technologies such as the Internet to conduct business, the Trust is susceptible to operational, information security and related risks. In general, cyber incidents can result from deliberate attacks or unintentional events. Cyber-attacks include, but are not limited to, gaining unauthorized access to digital systems ( e.g. , through “hacking” or malicious software coding) for purposes of misappropriating assets or sensitive information, corrupting data, or causing operational disruption. Cyber-attacks may also be carried out in a manner that does not require gaining unauthorized access, such as causing denial-of-service attacks on websites ( i.e. , efforts to make network services unavailable to intended users). Cyber security failures by or breaches of the Advisor and other service providers (including, but not limited to, fund accountants, custodians, transfer agents and administrators), and the issuers of securities in which the Trust invests, have the ability to cause disruptions and impact business operations, potentially resulting in financial losses, interference with the Trust’s ability to calculate its NAV, impediments to trading, the inability of shareholders to transact business, violations of applicable privacy and other laws, regulatory fines, penalties, reputational damage, reimbursement or other compensation costs, or additional compliance costs. In addition, substantial costs may be incurred in order to prevent any cyber incidents in the future. While the Trust has established business continuity plans in the event of, and risk management systems to prevent, such cyber-attacks, there are inherent limitations in such plans and systems including the possibility that certain risks have not been identified. Furthermore, the Trust cannot control the cyber security plans and systems put in place by service providers to the Trust and issuers in which the Trust invests . As a result, the Trust or its shareholders could be negatively impacted. Misconduct of Employees and of Service Providers Risk Misconduct or misrepresentations by employees of the Advisor or the Trust’s service providers could cause significant losses to the Trust. Employee misconduct may include binding the Trust to transactions that exceed authorized limits or present unacceptable risks and unauthorized trading activities, concealing unsuccessful trading activities (which, in any case, may result in unknown and unmanaged risks or losses) or making misrepresentations regarding any of the foregoing. Losses could also result from actions by the Trust’s service providers, including, without limitation, failing to recognize trades and misappropriating assets. In addition, employees and service providers may improperly use or disclose confidential information, which could result in litigation or serious financial harm, including limiting the Trust’s business prospects or future marketing activities. Despite the Advisor’s due diligence efforts, misconduct and intentional misrepresentations may be undetected or not fully comprehended, thereby potentially undermining the Advisor’s due diligence efforts. As a result, no assurances can be given that the due diligence performed by the Advisor will identify or prevent any such misconduct. Potential Conflicts of Interest of the Advisor and Others The investment activities of BlackRock, the ultimate parent company of the Advisor, and its affiliates, which include the Investment Advisor and PNC Financial Services Group, Inc. (“Affiliates”), in the management of, or their interest in, their own accounts and other accounts they manage, may present conflicts of interest that could disadvantage the Trust and its shareholders. BlackRock and its Affiliates provide investment management services to other funds and discretionary managed accounts that may follow investment programs similar to that of the Trust. Subject to the requirements of the Investment Company Act, BlackRock and its Affiliates intend to engage in such activities and may receive compensation from third parties for their services. None of BlackRock or its Affiliates are under any obligation to share any investment opportunity, idea or strategy with the Trust. As a result, BlackRock and its Affiliates may compete with the Trust for appropriate investment opportunities. The results of the Trust’s investment activities, therefore, may differ from those of an Affiliate or another account managed by an Affiliate and it is possible that the Trust could sustain losses during periods in which one or more Affiliates and other accounts achieve profits on their trading for proprietary or other accounts. BlackRock has adopted policies and procedures designed to address potential conflicts of interest. For additional information about potential conflicts of interest and the way in which BlackRock addresses such conflicts, please see “Conflicts of Interest” and “Management of the Trust—Portfolio Management—Potential Material Conflicts of Interest” in the SAI. Special Risks for Holders of Rights There is a risk that performance of the Trust may result in the common shares purchasable upon exercise of the rights being less attractive to investors at the conclusion of the subscription period. This may reduce or eliminate the value of the rights. Investors who receive rights may find that there is no market to sell rights they do not wish to exercise. If investors exercise only a portion of the rights, common shares may trade at less favorable prices than larger offerings for similar securities. Portfolio Turnover Risk The Trust’s annual portfolio turnover rate may vary greatly from year to year, as well as within a given year. Portfolio turnover rate is not considered a limiting factor in the execution of investment decisions for the Trust. A higher portfolio turnover rate results in correspondingly greater brokerage commissions and other transactional expenses that are borne by the Trust. High portfolio turnover may result in an increased realization of net short-term capital gains by the Trust which, when distributed to common shareholders, will be taxable as ordinary income. Additionally, in a declining market, portfolio turnover may create realized capital losses. Anti-Takeover Provisions Risk The Trust’s Agreement and Declaration of Trust and Bylaws include provisions that could limit the ability of other entities or persons to acquire control of the Trust or convert the Trust to open-end status or to change the composition of the Board. Such provisions could limit the ability of shareholders to sell their shares at a premium over prevailing market prices by discouraging a third party from seeking to obtain control of the Trust. See “Certain Provisions in the Agreement and Declaration of Trust and Bylaws.” |  |  |  |  |  |  |  |  |  |  |
Share Price [Table Text Block] |  | The Trust’s outstanding common shares are, and when issued, the common shares offered by this Prospectus will be, publicly held and listed and traded on the NYSE under the symbol “BDJ.” The Trust determines its NAV on a daily basis. The following table sets forth, for the quarters indicated, the highest and lowest daily closing prices on the NYSE per common share, and the NAV per common share and the premium to or discount from NAV, on the date of each of the high and low market prices. The table also sets forth the number of common shares traded on the NYSE during the respective quarters.
|  | NYSE Market Price Per Common Share |  |  | NAV per Common Share on Date of Market Price |  |  | Premium/ (Discount) on Date of Market Price |  |  | Trading Volume |
During Quarter Ended |  | High |  |  | Low |  |  | High |  |  | Low |  |  | High |  |  | Low |
March 31, 2023 |  | $ | 9.36 |  |  | $ | 8.26 |  |  | $ | 9.15 |  |  | $ | 8.23 |  |  |  | 2.30 | % |  |  | 0.36 | % |  |  | 25,059,984 |
December 31, 2022 |  | $ | 9.50 |  |  | $ | 8.14 |  |  | $ | 9.49 |  |  | $ | 8.58 |  |  |  | 0.11 | % |  |  | -5.13 | % |  |  | 29,748,145 |
September 30, 2022 |  | $ | 9.71 |  |  | $ | 8.08 |  |  | $ | 9.42 |  |  | $ | 8.47 |  |  |  | 3.08 | % |  |  | -4.60 | % |  |  | 27,876,699 |
June 30, 2022 |  | $ | 9.96 |  |  | $ | 8.29 |  |  | $ | 10.26 |  |  | $ | 9.26 |  |  |  | -2.92 | % |  |  | -10.44 | % |  |  | 31,606,667 |
March 31, 2022 |  | $ | 10.43 |  |  | $ | 9.15 |  |  | $ | 10.55 |  |  | $ | 9.73 |  |  |  | -1.14 | % |  |  | -5.96 | % |  |  | 40,186,783 |
December 31, 2021 |  | $ | 10.37 |  |  | $ | 9.37 |  |  | $ | 10.61 |  |  | $ | 9.85 |  |  |  | -2.26 | % |  |  | -4.87 | % |  |  | 25,023,382 |
September 30, 2021 |  | $ | 10.32 |  |  | $ | 7.67 |  |  | $ | 10.56 |  |  | $ | 10.37 |  |  |  | -2.27 | % |  |  | -26.05 | % |  |  | 25,057,428 |
June 30, 2021 |  | $ | 10.67 |  |  | $ | 9.45 |  |  | $ | 10.71 |  |  | $ | 10.20 |  |  |  | -0.37 | % |  |  | -7.35 | % |  |  | 29,826,097 |
March 31, 2021 |  | $ | 9.46 |  |  | $ | 8.29 |  |  | $ | 10.13 |  |  | $ | 9.17 |  |  |  | -6.61 | % |  |  | -9.60 | % |  |  | 36,216,853 |
As of May 25, 2023, the NAV per common share of the Trust was $8.50 and the market price per common share was $8.03, representing a discount to NAV of -5.53%. Common shares of the Trust have historically traded at both a premium and discount to NAV. As of May 25, 2023, the Trust has 186,494,195 outstanding common shares. |  |  |  |  |  |  |  |  |  |  |
Capital Stock, Long-Term Debt, and Other Securities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Stock [Table Text Block] |  | DESCRIPTION OF SHARES Common Shares The Trust is a statutory trust formed under the laws of Delaware pursuant to a Certificate of Trust, dated as of July 1, 2005, and an Agreement and Declaration of Trust, dated as of July 1, 2005 and as amended from time to time (the “Agreement and Declaration of Trust”). The Trust is authorized to issue an unlimited number of common shares of beneficial interest, par value $0.001 per share. Each common share has one vote and, when issued and paid for in accordance with the terms of this offering, will be fully paid and, under the Delaware Statutory Trust Act, the purchasers of the common shares will have no obligation to make further payments for the purchase of the common shares or contributions to the Trust solely by reason of their ownership of the common shares, except that the Trustees shall have the power to cause shareholders to pay certain expenses of the Trust by setting off charges due from shareholders from declared but unpaid dividends or distributions owed the shareholders and/or by reducing the number of common shares owned by each respective shareholder. If and whenever preferred shares are outstanding, the holders of common shares will not be entitled to receive any distributions from the Trust unless all accrued dividends on preferred shares have been paid, unless asset coverage (as defined in the Investment Company Act) with respect to preferred shares would be at least 200% after giving effect to the distributions and unless certain other requirements imposed by any rating agencies rating the preferred shares have been met. See “Description of Shares—Preferred Shares” in the SAI. All common shares are equal as to dividends, assets and voting privileges and have no conversion, preemptive or other subscription rights. The Trust will send annual and semi-annual reports, including financial statements, to all holders of its shares. Unlike open-end funds, closed-end funds like the Trust do not continuously offer shares and do not provide daily redemptions. Rather, if a shareholder determines to buy additional common shares or sell shares already held, the shareholder may do so by trading through a broker on the NYSE or otherwise. Shares of closed-end investment companies frequently trade on an exchange at prices lower than NAV. Shares of closed-end investment companies like the Trust have during some periods traded at prices higher than NAV and during other periods have traded at prices lower than NAV. Because the market value of the common shares may be influenced by such factors as dividend levels (which are in turn affected by expenses), call protection on its portfolio securities, dividend stability, portfolio credit quality, the Trust’s NAV, relative demand for and supply of such shares in the market, general market and economic conditions, market sentiment and other factors beyond the control of the Trust, the Trust cannot assure you that its common shares will trade at a price equal to or higher than NAV in the future. The common shares are designed primarily for long-term investors and you should not purchase the common shares if you intend to sell them soon after purchase. See “Repurchase of Common Shares” below and “ Repurchase of Common Shares” in the SAI. Preferred Shares The Agreement and Declaration of Trust provides that the Board may authorize and issue preferred shares, with rights as determined by the Board, by action of the Board without the approval of the holders of common shares. Holders of common shares have no preemptive right to purchase any preferred shares that might be issued. The Trust does not currently intend to issue preferred shares. Under the Investment Company Act, the Trust is not permitted to issue preferred shares unless immediately after such issuance the value of the Trust’s total assets is at least 200% of the liquidation value of the outstanding preferred shares ( i.e. , the liquidation value may not exceed 50% of the Trust’s total assets). In addition, the Trust is not permitted to declare any cash dividend or other distribution on its common shares unless, at the time of such declaration, the value of the Trust’s total assets is at least 200% of such liquidation value. If the Trust issues preferred shares, it may be subject to restrictions imposed by the guidelines of one or more rating agencies that may issue ratings for preferred shares issued by the Trust. These guidelines may impose asset coverage or portfolio composition requirements that are more stringent than those imposed on the Trust by the Investment Company Act. It is not anticipated that these covenants or guidelines would impede the Advisor from managing the Trust’s portfolio in accordance with the Trust’s investment objectives and policies. Please see “Description of Shares” in the SAI for more information. |  |  |  |  |  |  |  |  |  |  |
Other Security, Title [Text Block] |  | RIGHTS OFFERINGS |  |  |  |  |  |  |  |  |  |  |
Other Security, Description [Text Block] |  | RIGHTS OFFERINGS The Trust may in the future, and at its discretion, choose to make offerings of rights to its shareholders to purchase common shares. Rights may be issued independently or together with any other offered security and may or may not be transferable by the person purchasing or receiving the rights. In connection with a rights offering to shareholders, we would distribute certificates or other documentation ( i.e. , rights cards distributed in lieu of certificates) evidencing the rights and a Prospectus Supplement to our shareholders as of the record date that we set for determining the shareholders eligible to receive rights in such rights offering. Any such future rights offering will be made in accordance with the Investment Company Act. Under the laws of Delaware, the Board is authorized to approve rights offerings without obtaining shareholder approval. The staff of the SEC has interpreted the Investment Company Act as not requiring shareholder approval of a transferable rights offering to purchase common shares at a price below the then current NAV so long as certain conditions are met, including: (i) a good faith determination by a fund’s board that such offering would result in a net benefit to existing shareholders; (ii) the offering fully protects shareholders’ preemptive rights and does not discriminate among shareholders (except for the possible effect of not offering fractional rights); (iii) management uses its best efforts to ensure an adequate trading market in the rights for use by shareholders who do not exercise such rights; and (iv) the ratio of a transferable rights offering does not exceed one new share for each three rights held. The applicable Prospectus Supplement would describe the following terms of the rights in respect of which this Prospectus is being delivered:
| • |  | the period of time the offering would remain open;
| • |  | the underwriter or distributor, if any, of the rights and any associated underwriting fees or discounts applicable to purchases of the rights;
| • |  | the title of such rights;
| • |  | the exercise price for such rights (or method of calculation thereof);
| • |  | the number of such rights issued in respect of each share;
| • |  | the number of rights required to purchase a single share;
| • |  | the extent to which such rights are transferable and the market on which they may be traded if they are transferable;
| • |  | if applicable, a discussion of the material U.S. federal income tax considerations applicable to the issuance or exercise of such rights;
| • |  | the date on which the right to exercise such rights will commence, and the date on which such right will expire (subject to any extension);
| • |  | the extent to which such rights include an over-subscription privilege with respect to unsubscribed securities and the terms of such over-subscription privilege; and
| • |  | termination rights we may have in connection with such rights offering.
A certain number of rights would entitle the holder of the right(s) to purchase for cash such number of common shares at such exercise price as in each case is set forth in, or be determinable as set forth in, the Prospectus Supplement relating to the rights offered thereby. Rights would be exercisable at any time up to the close of business on the expiration date for such rights set forth in the Prospectus Supplement. After the close of business on the expiration date, all unexercised rights would become void. Upon expiration of the rights offering and the receipt of payment and the rights certificate or other appropriate documentation properly executed and completed and duly executed at the corporate trust office of the rights agent, or any other office indicated in the Prospectus Supplement, the common shares purchased as a result of such exercise will be issued as soon as practicable. To the extent permissible under applicable law, we may determine to offer any unsubscribed offered securities directly to persons other than shareholders, to or through agents, underwriters or dealers or through a combination of such methods, as set forth in the applicable Prospectus Supplement. |  |  |  |  |  |  |  |  |  |  |
Outstanding Securities [Table Text Block] |  | Authorized Shares The following table provides the Trust’s authorized shares and common shares outstanding as of April 30, 2023.
Title of Class |  | Amount Authorized |  |  | Amount Held by Trust or for its Account |  |  | Amount Outstanding Exclusive of Amount held by Trust |
Common Shares |  |  | Unlimited |  |  |  | 0 |  |  |  | 186,494,195 |
General Risks [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | General Risks Please refer to the section of the Trust’s most recent annual report on Form N-CSR entitled “Trust Investment Objectives, Policies and Risks—Risk Factors,” which is incorporated by reference herein, for a discussion of the general risks of investing in the Trust. |  |  |  |  |  |  |  |  |  |  |
Counterparty Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Counterparty Risk The Trust will be subject to credit risk with respect to the counterparties to the derivative contracts purchased by the Trust. Because derivative transactions in which the Trust may engage may involve instruments that are not traded on an exchange or cleared through a central counterparty but are instead traded between counterparties based on contractual relationships, the Trust is subject to the risk that a counterparty will not perform its obligations under the related contracts. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, the Trust may experience significant delays in obtaining any recovery in bankruptcy or other reorganization proceedings. The Trust may obtain only a limited recovery, or may obtain no recovery, in such circumstances. Although the Trust intends to enter into transactions only with counterparties that the Advisor believes to be creditworthy, there can be no assurance that, as a result, a counterparty will not default and that the Trust will not sustain a loss on a transaction. In the event of the counterparty’s bankruptcy or insolvency, the Trust’s collateral may be subject to the conflicting claims of the counterparty’s creditors, and the Trust may be exposed to the risk of a court treating the Trust as a general unsecured creditor of the counterparty, rather than as the owner of the collateral. The counterparty risk for cleared derivatives is generally lower than for uncleared OTC derivative transactions since generally a clearing organization becomes substituted for each counterparty to a cleared derivative contract and, in effect, guarantees the parties’ performance under the contract as each party to a trade looks only to the clearing organization for performance of financial obligations under the derivative contract. However, there can be no assurance that a clearing organization, or its members, will satisfy its obligations to the Trust, or that the Trust would be able to recover the full amount of assets deposited on its behalf with the clearing organization in the event of the default by the clearing organization or the Trust’s clearing broker. In addition, cleared derivative transactions benefit from daily marking-to-market and settlement, and segregation and minimum capital requirements applicable to intermediaries. Uncleared OTC derivative transactions generally do not benefit from such protections. This exposes the Trust to the risk that a counterparty will not settle a transaction in accordance with its terms and conditions because of a dispute over the terms of the contract (whether or not bona fide) or because of a credit or liquidity problem, thus causing the Trust to suffer a loss. Such “counterparty risk” is accentuated for contracts with longer maturities where events may intervene to prevent settlement, or where the Trust has concentrated its transactions with a single or small group of counterparties. In addition, the Trust is subject to the risk that issuers of the instruments in which it invests and trades may default on their obligations under those instruments, and that certain events may occur that have an immediate and significant adverse effect on the value of those instruments. There can be no assurance that an issuer of an instrument in which the Trust invests will not default, or that an event that has an immediate and significant adverse effect on the value of an instrument will not occur, and that the Trust will not sustain a loss on a transaction as a result. |  |  |  |  |  |  |  |  |  |  |
Defensive Investing Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Defensive Investing Risk For defensive purposes, the Trust may allocate assets into cash or short-term fixed-income securities without limitation. In doing so, the Trust may succeed in avoiding losses but may otherwise fail to achieve its investment objectives. Further, the value of short-term fixed-income securities may be affected by changing interest rates and by changes in credit ratings of the investments. If the Trust holds cash uninvested it will be subject to the credit risk of the depository institution holding the cash. |  |  |  |  |  |  |  |  |  |  |
Issuer Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Issuer Risk The value of a security may decline for a number of reasons which directly relate to the issuer, such as management performance, financial leverage, reduced demand for the issuer’s goods and services, historical and prospective earnings of the issuer and the value of the assets of the issuer. The amount of a dividend may decline for reasons related to an issuer, such as changes in an issuer’s financial condition or a decision by the issuer to pay a lower dividend. |  |  |  |  |  |  |  |  |  |  |
Inflation Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Inflation Risk Inflation risk is the risk that the value of assets or income from investment will be worth less in the future, as inflation decreases the value of money. Inflation rates may change frequently and drastically as a result of various factors, including unexpected shifts in the domestic or global economy. As inflation increases, the real value of the common shares and distributions on those shares can decline. In addition, during any periods of rising inflation, interest rates on any borrowings by the Trust would likely increase, which would tend to further reduce returns to the holders of common shares. |  |  |  |  |  |  |  |  |  |  |
Deflation Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Deflation Risk Deflation risk is the risk that prices throughout the economy decline over time, which may have an adverse effect on the market valuation of companies, their assets and their revenues. In addition, deflation may have an adverse effect on the creditworthiness of issuers and may make issuer default more likely, which may result in a decline in the value of the Trust’s portfolio. |  |  |  |  |  |  |  |  |  |  |
Legal, Tax and Regulatory Risks [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Legal, Tax and Regulatory Risks Legal, tax and regulatory changes could occur that may have material adverse effects on the Trust. To qualify for the favorable U.S. federal income tax treatment generally accorded to RICs, the Trust must, among other things, derive in each taxable year at least 90% of its gross income from certain prescribed sources and distribute for each taxable year at least 90% of its “investment company taxable income” (generally, ordinary income plus the excess, if any, of net short-term capital gain over net long-term capital loss). If for any taxable year the Trust does not qualify as a RIC, all of its taxable income for that year (including its net capital gain) would be subject to tax at regular corporate rates without any deduction for distributions to shareholders, and such distributions would be taxable as ordinary dividends to the extent of the Trust’s current and accumulated earnings and profits. The Biden presidential administration has called for significant changes to U.S. fiscal, tax, trade, healthcare, immigration, foreign, and government regulatory policy. In this regard, there is significant uncertainty with respect to legislation, regulation and government policy at the federal level, as well as the state and local levels. Recent events have created a climate of heightened uncertainty and introduced new and difficult-to-quantify macroeconomic and political risks with potentially far-reaching implications. There has been a corresponding meaningful increase in the uncertainty surrounding interest rates, inflation, foreign exchange rates, trade volumes and fiscal and monetary policy. To the extent the U.S. Congress or the current presidential administration implements changes to U.S. policy, those changes may impact, among other things, the U.S. and global economy, international trade and relations, unemployment, immigration, corporate taxes, healthcare, the U.S. regulatory environment, inflation and other areas. Although the Trust cannot predict the impact, if any, of these changes to the Trust’s business, they could adversely affect the Trust’s business, financial condition, operating results and cash flows. Until the Trust knows what policy changes are made and how those changes impact the Trust’s business and the business of the Trust’s competitors over the long term, the Trust will not know if, overall, the Trust will benefit from them or be negatively affected by them. The rules dealing with U.S. federal income taxation are constantly under review by persons involved in the legislative process and by the Internal Revenue Service (“IRS”) and the U.S. Treasury Department. Revisions in U.S. federal tax laws and interpretations of these laws could adversely affect the tax consequences of your investment. |  |  |  |  |  |  |  |  |  |  |
LIBOR Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | LIBOR Risk The Trust may be exposed to financial instruments that are tied to the London Interbank Offered Rate (“LIBOR”) to determine payment obligations, financing terms, hedging strategies or investment value. The Trust’s investments may pay interest at floating rates based on LIBOR or may be subject to interest caps or floors based on LIBOR. The Trust may also obtain financing at floating rates based on LIBOR. Derivative instruments utilized by the Trust may also reference LIBOR. The United Kingdom’s Financial Conduct Authority announced a phase out of LIBOR such that after June 30, 2023, the overnight, 1-month, 3-month, 6-month and 12-month U.S. dollar LIBOR settings will cease to be published or will no longer be representative. All other LIBOR settings and certain other interbank offered rates, such as the Euro Overnight Index Average, ceased to be published or representative after December 31, 2021. The Secured Overnight Financing Rate (“SOFR”) is a broad measure of the cost of borrowing cash overnight collateralized by U.S. Treasury securities in the repurchase agreement (“repo”) market and has been used increasingly on a voluntary basis in new instruments and transactions. On December 16, 2022, the Federal Reserve Board adopted regulations implementing the Adjustable Interest Rate Act, which provides a statutory fallback mechanism to replace LIBOR, by identifying benchmark rates based on SOFR that will replace LIBOR in certain financial contracts after June 30, 2023. These regulations apply only to contracts governed by U.S. law, among other limitations. The regulations include provisions that (i) provide a safe harbor for selection or use of a replacement benchmark rate selected by the Federal Reserve Board; (ii) clarify who may choose the replacement benchmark rate selected by the Federal Reserve Board; and (iii) ensure that contracts adopting a replacement benchmark rate selected by the Federal Reserve Board will not be interrupted or terminated following the replacement of LIBOR. Neither the effect of the LIBOR transition process nor its ultimate success can yet be known. While some existing LIBOR-based instruments may contemplate a scenario where LIBOR is no longer available by providing for an alternative rate-setting methodology, there may be significant uncertainty regarding the effectiveness of any such alternative methodologies to replicate LIBOR. Not all existing LIBOR-based instruments may have alternative rate-setting provisions and there remains uncertainty regarding the willingness and ability of issuers to add alternative rate-setting provisions in certain existing instruments. Parties to contracts, securities or other instruments using LIBOR may disagree on transition rates or the application of transition regulation, potentially resulting in uncertainty of performance and the possibility of litigation. The Trust may have instruments linked to other interbank offered rates that may also cease to be published in the future. |  |  |  |  |  |  |  |  |  |  |
Risk Associated with Recent Market Events [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Risk Associated with Recent Market Events While interest rates have been historically low in recent years in the United States and abroad, inflation rates have recently risen significantly and the Federal Reserve and other central banks have recently begun raising interest rates to address inflation which, among other factors, has led to markets to experiencing high volatility. A significant increase in interest rates may cause a further decline in the market for equity securities and could lead to a recession. Further, regulators have expressed concern that rate increases may contribute to price volatility. The impact of inflation and the recent actions of the Federal Reserve have led to market volatility and may negatively affect the value of debt instruments held by the Trust and result in a negative impact on the Trust’s performance. See “Risks—Inflation Risk.” In addition, the current contentious domestic political environment, as well as political and diplomatic events in the United States and abroad, such as presidential elections in the United States or the U.S. government’s inability at times to agree on a long-term budget and deficit reduction plan, has in the past resulted, and may in the future result, in adverse consequences (including a government shutdown) to the U.S. regulatory landscape, the general market environment and/or investment sentiment, which could negatively impact the Trust’s investments and operations. Such adverse consequences may affect investor and/or consumer confidence and may adversely impact financial markets and the broader economy, potentially to a significant degree. In recent years, some countries, including the United States, have adopted and/or are considering the adoption of more protectionist trade policies. A rise in protectionist trade policies, and the possibility of changes to some international trade agreements, could affect the economies of many nations in ways that cannot necessarily be foreseen at the present time. In addition, geopolitical and other risks, including environmental and public health, may add to instability in world economies and markets generally. Economies and financial markets throughout the world are becoming increasingly interconnected. As a result, whether or not the Trust invests in securities of issuers located in or with significant exposure to countries experiencing economic, political and/or financial difficulties, the value and liquidity of the Trust’s investments may be negatively affected by such events. An outbreak of an infectious coronavirus (COVID-19) that was first detected in December 2019 developed into a global pandemic that has resulted in numerous disruptions in the market and has had significant economic impact leaving general concern and uncertainty. Although vaccines have been developed and approved for use by various governments, the duration of the pandemic and its effects cannot be predicted with certainty. The impact of this coronavirus, and other epidemics and pandemics that may arise in the future, could affect the economies of many nations, individual companies and the market in general ways that cannot necessarily be foreseen at the present time. |  |  |  |  |  |  |  |  |  |  |
Economic and Monetary Union ("EMU") and Redenomination Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Economic and Monetary Union (“EMU”) and Redenomination Risk As the European debt crisis progressed, the possibility of one or more Eurozone countries exiting the EMU, or even the collapse of the Euro as a common currency, arose, creating significant volatility at times in currency and financial markets generally. The effects of the collapse of the Euro, or of the exit of one or more countries from the EMU, on the U.S. and global economy and securities markets are impossible to predict and any such events could have a significant adverse impact on the value and risk profile of the Trust’s portfolio. Any partial or complete dissolution of the EMU could have significant adverse effects on currency and financial markets, and on the values of the Trust’s portfolio investments. If one or more EMU countries were to stop using the Euro as its primary currency, the Trust’s investments in such countries may be redenominated into a different or newly adopted currency. As a result, the value of those investments could decline significantly and unpredictably. In addition, securities or other investments that are redenominated may be subject to foreign currency risk, illiquidity risk and valuation risk to a greater extent than similar investments currently denominated in Euros. To the extent a currency used for redenomination purposes is not specified in respect of certain EMU-related investments, or should the Euro cease to be used entirely, the currency in which such investments are denominated may be unclear, making such investments particularly difficult to value or dispose of. The Trust may incur additional expenses to the extent it is required to seek judicial or other clarification of the denomination or value of such securities. |  |  |  |  |  |  |  |  |  |  |
Market Disruption and Geopolitical Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Market Disruption and Geopolitical Risk The occurrence of events similar to those in recent years, such as the aftermath of the war in Iraq, instability in Afghanistan, Pakistan, Egypt, Libya, Syria, Russia, Ukraine and the Middle East, new and ongoing epidemics and pandemics of infectious diseases and other global health events, natural/environmental disasters, terrorist attacks in the United States and around the world, social and political discord, debt crises (such as the Greek crisis), sovereign debt downgrades, increasingly strained relations between the United States and a number of foreign countries, including historical adversaries, such as North Korea, Iran, China and Russia, and the international community generally, new and continued political unrest in various countries, such as Venezuela and Spain, the exit or potential exit of one or more countries from the European Union (“EU”) or the European Monetary Union, continued changes in the balance of political power among and within the branches of the U.S. government, among others, may result in market volatility, may have long term effects on the U.S. and worldwide financial markets, and may cause further economic uncertainties in the United States and worldwide. Russia launched a large-scale invasion of Ukraine on February 24, 2022. The extent and duration of the military action, resulting sanctions and resulting future market disruptions, including declines in its stock markets and the value of the ruble against the U.S. dollar, in the region are impossible to predict, but could be significant. Any such disruptions caused by Russian military action or other actions (including cyberattacks and espionage) or resulting actual and threatened responses to such activity, including purchasing and financing restrictions, boycotts or changes in consumer or purchaser preferences, sanctions, tariffs or cyberattacks on the Russian government, Russian companies or Russian individuals, including politicians, could have a severe adverse effect on Russia and the European region, including significant negative impacts on the Russian economy, the European economy and the markets for certain securities and commodities, such as oil and natural gas, and may likely have collateral impacts on such sectors globally as well as other sectors. How long such military action and related events will last cannot be predicted. China and the United States have each imposed tariffs on the other country’s products. These actions may cause a significant reduction in international trade, the oversupply of certain manufactured goods, substantial price reductions of goods and possible failure of individual companies and/or large segments of China’s export industry, which could have a negative impact on the Trust’s performance. U.S. companies that source material and goods from China and those that make large amounts of sales in China would be particularly vulnerable to an escalation of trade tensions. Uncertainty regarding the outcome of the trade tensions and the potential for a trade war could cause the U.S. dollar to decline against safe haven currencies, such as the Japanese yen and the euro. Events such as these and their consequences are difficult to predict and it is unclear whether further tariffs may be imposed or other escalating actions may be taken in the future. On January 31, 2020, the United Kingdom (“UK”) officially withdrew from the EU (commonly known as “Brexit”). The UK and EU reached a preliminary trade agreement, which became effective on January 1, 2021, regarding the terms of their future trading relationship relating principally to the trading of goods; however, negotiations are ongoing for matters not covered by the agreement, such as the trade of financial services. Due to uncertainty of the current political environment, it is not possible to foresee the form or nature of the future trading relationship between the UK and the EU. The longer term economic, legal, political and social framework to be put in place between the UK and the EU remains unclear and the ongoing political and economic uncertainty and periods of exacerbated volatility in both the UK and in wider European markets may continue for some time. In particular, Brexit may lead to a call for similar referendums in other European jurisdictions which may cause increased economic volatility in the European and global markets and may destabilize some or all of the other EU member countries. This uncertainty may have an adverse effect on the economy generally and on the ability of the Trust and its investments to execute their respective strategies, to receive attractive returns and/or to exit certain investments at an advantageous time or price. In particular, currency volatility may mean that the returns of the Trust and its investments are adversely affected by market movements and may make it more difficult, or more expensive, if the Trust elects to execute currency hedges. Potential decline in the value of the British Pound and/or the Euro against other currencies, along with the potential downgrading of the UK’s sovereign credit rating, may also have an impact on the performance of portfolio companies or investments located in the UK or Europe. In light of the above, no definitive assessment can currently be made regarding the impact that Brexit will have on the Trust, its investments or its organization more generally. Cybersecurity incidents affecting particular companies or industries may adversely affect the economies of particular countries, regions or parts of the world in which the Trust invests. The occurrence of any of these above events could have a significant adverse impact on the value and risk profile of the Trust’s portfolio. The Trust does not know how long the securities markets may be affected by similar events and cannot predict the effects of similar events in the future on the U.S. economy and securities markets. There can be no assurance that similar events and other market disruptions will not have other material and adverse implications. |  |  |  |  |  |  |  |  |  |  |
Regulation and Government Intervention Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Regulation and Government Intervention Risk Federal, state, and other governments, their regulatory agencies or self-regulatory organizations may take actions that affect the regulation of the issuers in which the Trust invests in ways that are unforeseeable. Legislation or regulation may also change the way in which the Trust is regulated. Such legislation or regulation could limit or preclude the Trust’s ability to achieve its investment objectives. In light of popular, political and judicial focus on finance related consumer protection, financial institution practices are also subject to greater scrutiny and criticism generally. In the case of transactions between financial institutions and the general public, there may be a greater tendency toward strict interpretation of terms and legal rights in favor of the consuming public, particularly where there is a real or perceived disparity in risk allocation and/or where consumers are perceived as not having had an opportunity to exercise informed consent to the transaction. In the event of conflicting interests between retail investors holding common shares of a closed-end investment company such as the Trust and a large financial institution, a court may similarly seek to strictly interpret terms and legal rights in favor of retail investors. The Trust may be affected by governmental action in ways that are not foreseeable, and there is a possibility that such actions could have a significant adverse effect on the Trust and its ability to achieve its investment objectives. Investment Company Act Regulations . The Trust is a registered closed-end management investment company and as such is subject to regulations under the Investment Company Act. Generally speaking, any contract or provision thereof that is made, or where performance involves a violation of the Investment Company Act or any rule or regulation thereunder is unenforceable by either party unless a court finds otherwise. |  |  |  |  |  |  |  |  |  |  |
Failures of Futures Commission Merchants and Clearing Organizations Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Failures of Futures Commission Merchants and Clearing Organizations Risk The Trust is required to deposit funds to margin open positions in cleared derivative instruments (both futures and swaps) with a clearing broker registered as a “futures commission merchant” (“FCM”). The Commodity Exchange Act (“CEA”) requires an FCM to segregate all funds received from customers with respect to any orders for the purchase or sale of U.S. domestic futures contracts and cleared swaps from the FCM’s proprietary assets. Similarly, the CEA requires each FCM to hold in a separate secure account all funds received from customers with respect to any orders for the purchase or sale of foreign futures contracts and segregate any such funds from the funds received with respect to domestic futures contracts. However, all funds and other property received by an FCM from its customers are held by an FCM on a commingled basis in an omnibus account and amounts in excess of assets posted to the clearing organization may be invested by an FCM in certain instruments permitted under the applicable regulation. There is a risk that assets deposited by the Trust with any FCM as margin for futures contracts or commodity options may, in certain circumstances, be used to satisfy losses of other clients of the Trust’s FCM. In addition, the assets of the Trust posted as margin against both swaps and futures contracts may not be fully protected in the event of the FCM’s bankruptcy. |  |  |  |  |  |  |  |  |  |  |
Regulation as a "Commodity Pool" [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Regulation as a “Commodity Pool” The Commodity Futures Trading Commission (“CFTC”) subjects advisers to registered investment companies to regulation by the CFTC if a fund that is advised by the investment adviser either (i) invests, directly or indirectly, more than a prescribed level of its liquidation value in CFTC-regulated futures, options and swaps (“CFTC Derivatives”), or (ii) markets itself as providing investment exposure to such instruments. To the extent the Trust uses CFTC Derivatives, it intends to do so below such prescribed levels and will not market itself as a “commodity pool” or a vehicle for trading such instruments. Accordingly, the Advisor has claimed an exclusion from the definition of the term “commodity pool operator” under the CEA pursuant to Rule 4.5 under the CEA. The Advisor is not, therefore, subject to registration or regulation as a “commodity pool operator” under the CEA in respect of the Trust. |  |  |  |  |  |  |  |  |  |  |
Decision-Making Authority Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Decision-Making Authority Risk Investors have no authority to make decisions or to exercise business discretion on behalf of the Trust, except as set forth in the Trust’s governing documents. The authority for all such decisions is generally delegated to the Board, which in turn, has delegated the day-to-day management of the Trust’s investment activities to the Advisor, subject to oversight by the Board. |  |  |  |  |  |  |  |  |  |  |
Management Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Management Risk The Trust is subject to management risk because it is an actively managed investment portfolio. The Advisor and the individual portfolio managers will apply investment techniques and risk analyses in making investment decisions for the Trust, but there can be no guarantee that these will produce the desired results. The Trust may be subject to a relatively high level of management risk because the Trust may invest in derivative instruments, which may be highly specialized instruments that require investment techniques and risk analyses different from those associated with equities and bonds. |  |  |  |  |  |  |  |  |  |  |
Reliance on the Advisor Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Reliance on the Advisor Risk The Trust is dependent upon services and resources provided by the Advisor, and therefore the Advisor’s parent, BlackRock. The Advisor is not required to devote its full time to the business of the Trust and there is no guarantee or requirement that any investment professional or other employee of the Advisor will allocate a substantial portion of his or her time to the Trust. The loss of one or more individuals involved with the Advisor could have a material adverse effect on the performance or the continued operation of the Trust. For additional information on the Advisor and BlackRock, see “Management of the Trust—Investment Advisor.” |  |  |  |  |  |  |  |  |  |  |
Reliance on Service Providers Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Reliance on Service Providers Risk The Trust must rely upon the performance of service providers to perform certain functions, which may include functions that are integral to the Trust’s operations and financial performance. Failure by any service provider to carry out its obligations to the Trust in accordance with the terms of its appointment, to exercise due care and skill or to perform its obligations to the Trust at all as a result of insolvency, bankruptcy or other causes could have a material adverse effect on the Trust’s performance and returns to shareholders. The termination of the Trust’s relationship with any service provider, or any delay in appointing a replacement for such service provider, could materially disrupt the business of the Trust and could have a material adverse effect on the Trust’s performance and returns to shareholders. |  |  |  |  |  |  |  |  |  |  |
Information Technology Systems Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Information Technology Systems Risk The Trust is dependent on the Advisor for certain management services as well as back-office functions. The Advisor depends on information technology systems in order to assess investment opportunities, strategies and markets and to monitor and control risks for the Trust. It is possible that a failure of some kind which causes disruptions to these information technology systems could materially limit the Advisor’s ability to adequately assess and adjust investments, formulate strategies and provide adequate risk control. Any such information technology-related difficulty could harm the performance of the Trust. Further, failure of the back-office functions of the Advisor to process trades in a timely fashion could prejudice the investment performance of the Trust. |  |  |  |  |  |  |  |  |  |  |
Cyber Security Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Cyber Security Risk With the increased use of technologies such as the Internet to conduct business, the Trust is susceptible to operational, information security and related risks. In general, cyber incidents can result from deliberate attacks or unintentional events. Cyber-attacks include, but are not limited to, gaining unauthorized access to digital systems ( e.g. , through “hacking” or malicious software coding) for purposes of misappropriating assets or sensitive information, corrupting data, or causing operational disruption. Cyber-attacks may also be carried out in a manner that does not require gaining unauthorized access, such as causing denial-of-service attacks on websites ( i.e. , efforts to make network services unavailable to intended users). Cyber security failures by or breaches of the Advisor and other service providers (including, but not limited to, fund accountants, custodians, transfer agents and administrators), and the issuers of securities in which the Trust invests, have the ability to cause disruptions and impact business operations, potentially resulting in financial losses, interference with the Trust’s ability to calculate its NAV, impediments to trading, the inability of shareholders to transact business, violations of applicable privacy and other laws, regulatory fines, penalties, reputational damage, reimbursement or other compensation costs, or additional compliance costs. In addition, substantial costs may be incurred in order to prevent any cyber incidents in the future. While the Trust has established business continuity plans in the event of, and risk management systems to prevent, such cyber-attacks, there are inherent limitations in such plans and systems including the possibility that certain risks have not been identified. Furthermore, the Trust cannot control the cyber security plans and systems put in place by service providers to the Trust and issuers in which the Trust invests . As a result, the Trust or its shareholders could be negatively impacted. |  |  |  |  |  |  |  |  |  |  |
Misconduct of Employees and of Service Providers Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Misconduct of Employees and of Service Providers Risk Misconduct or misrepresentations by employees of the Advisor or the Trust’s service providers could cause significant losses to the Trust. Employee misconduct may include binding the Trust to transactions that exceed authorized limits or present unacceptable risks and unauthorized trading activities, concealing unsuccessful trading activities (which, in any case, may result in unknown and unmanaged risks or losses) or making misrepresentations regarding any of the foregoing. Losses could also result from actions by the Trust’s service providers, including, without limitation, failing to recognize trades and misappropriating assets. In addition, employees and service providers may improperly use or disclose confidential information, which could result in litigation or serious financial harm, including limiting the Trust’s business prospects or future marketing activities. Despite the Advisor’s due diligence efforts, misconduct and intentional misrepresentations may be undetected or not fully comprehended, thereby potentially undermining the Advisor’s due diligence efforts. As a result, no assurances can be given that the due diligence performed by the Advisor will identify or prevent any such misconduct. |  |  |  |  |  |  |  |  |  |  |
Potential Conflicts of Interest of the Advisor and Others [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Potential Conflicts of Interest of the Advisor and Others The investment activities of BlackRock, the ultimate parent company of the Advisor, and its affiliates, which include the Investment Advisor and PNC Financial Services Group, Inc. (“Affiliates”), in the management of, or their interest in, their own accounts and other accounts they manage, may present conflicts of interest that could disadvantage the Trust and its shareholders. BlackRock and its Affiliates provide investment management services to other funds and discretionary managed accounts that may follow investment programs similar to that of the Trust. Subject to the requirements of the Investment Company Act, BlackRock and its Affiliates intend to engage in such activities and may receive compensation from third parties for their services. None of BlackRock or its Affiliates are under any obligation to share any investment opportunity, idea or strategy with the Trust. As a result, BlackRock and its Affiliates may compete with the Trust for appropriate investment opportunities. The results of the Trust’s investment activities, therefore, may differ from those of an Affiliate or another account managed by an Affiliate and it is possible that the Trust could sustain losses during periods in which one or more Affiliates and other accounts achieve profits on their trading for proprietary or other accounts. BlackRock has adopted policies and procedures designed to address potential conflicts of interest. For additional information about potential conflicts of interest and the way in which BlackRock addresses such conflicts, please see “Conflicts of Interest” and “Management of the Trust—Portfolio Management—Potential Material Conflicts of Interest” in the SAI. |  |  |  |  |  |  |  |  |  |  |
Special Risks for Holders of Rights [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Special Risks for Holders of Rights There is a risk that performance of the Trust may result in the common shares purchasable upon exercise of the rights being less attractive to investors at the conclusion of the subscription period. This may reduce or eliminate the value of the rights. Investors who receive rights may find that there is no market to sell rights they do not wish to exercise. If investors exercise only a portion of the rights, common shares may trade at less favorable prices than larger offerings for similar securities. |  |  |  |  |  |  |  |  |  |  |
Portfolio Turnover Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Portfolio Turnover Risk The Trust’s annual portfolio turnover rate may vary greatly from year to year, as well as within a given year. Portfolio turnover rate is not considered a limiting factor in the execution of investment decisions for the Trust. A higher portfolio turnover rate results in correspondingly greater brokerage commissions and other transactional expenses that are borne by the Trust. High portfolio turnover may result in an increased realization of net short-term capital gains by the Trust which, when distributed to common shareholders, will be taxable as ordinary income. Additionally, in a declining market, portfolio turnover may create realized capital losses. |  |  |  |  |  |  |  |  |  |  |
Anti-Takeover Provisions Risk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Risk [Text Block] |  | Anti-Takeover Provisions Risk The Trust’s Agreement and Declaration of Trust and Bylaws include provisions that could limit the ability of other entities or persons to acquire control of the Trust or convert the Trust to open-end status or to change the composition of the Board. Such provisions could limit the ability of shareholders to sell their shares at a premium over prevailing market prices by discouraging a third party from seeking to obtain control of the Trust. See “Certain Provisions in the Agreement and Declaration of Trust and Bylaws.” |  |  |  |  |  |  |  |  |  |  |
Business Contact [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Cover [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Entity Address, Address Line One |  | 50 Hudson Yards |  |  |  |  |  |  |  |  |  |  |
Entity Address, City or Town |  | New York |  |  |  |  |  |  |  |  |  |  |
Entity Address, State or Province |  | NY |  |  |  |  |  |  |  |  |  |  |
Entity Address, Postal Zip Code |  | 10001 |  |  |  |  |  |  |  |  |  |  |
Contact Personnel Name |  | John M. Perlowski |  |  |  |  |  |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Other Annual Expenses [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Basis of Transaction Fees, Note [Text Block] |  | as a percentage of net assets attributable to common shares |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Lowest Price or Bid |  |  |  |  | $ 8.26 | $ 8.14 | $ 8.08 | $ 8.29 | $ 9.15 | $ 9.37 | $ 7.67 | $ 9.45 | $ 8.29
Highest Price or Bid |  |  |  |  | 9.36 | 9.5 | 9.71 | 9.96 | 10.43 | 10.37 | 10.32 | 10.67 | 9.46
Lowest Price or Bid, NAV |  |  |  |  | 8.23 | 8.58 | 8.47 | 9.26 | 9.73 | 9.85 | 10.37 | 10.2 | 9.17
Highest Price or Bid, NAV |  |  |  |  | $ 9.15 | $ 9.49 | $ 9.42 | $ 10.26 | $ 10.55 | $ 10.61 | $ 10.56 | $ 10.71 | $ 10.13
Highest Price or Bid, Premium (Discount) to NAV [Percent] |  |  |  |  | 2.30% | 0.11% | 3.08% | (2.92%) | (1.14%) | (2.26%) | (2.27%) | (0.37%) | (6.61%)
Lowest Price or Bid, Premium (Discount) to NAV [Percent] |  |  |  |  | 0.36% | (5.13%) | (4.60%) | (10.44%) | (5.96%) | (4.87%) | (26.05%) | (7.35%) | (9.60%)
Latest Share Price |  |  | $ 8.03 |  |  |  |  |  |  |  |  |  |
Latest Premium (Discount) to NAV [Percent] |  |  | (5.53%) |  |  |  |  |  |  |  |  |  |
Latest NAV |  |  | $ 8.5 |  |  |  |  |  |  |  |  |  |
Capital Stock, Long-Term Debt, and Other Securities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Security Title [Text Block] |  | Common Shares |  |  |  |  |  |  |  |  |  |  |
Security Voting Rights [Text Block] |  | Each common share has one vote |  |  |  |  |  |  |  |  |  |  |
Outstanding Security, Title [Text Block] |  |  |  | Common Shares |  |  |  |  |  |  |  |  |
Outstanding Security, Held [Shares] |  |  |  | 0 |  |  |  |  |  |  |  |  |
Outstanding Security, Not Held [Shares] |  |  |  | 186,494,195 |  |  |  |  |  |  |  |  |
Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Stock, Long-Term Debt, and Other Securities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Security Title [Text Block] |  | Preferred Shares |  |  |  |  |  |  |  |  |  |  |
[1] | If the common shares are sold to or through underwriters, the Prospectus Supplement will set forth any applicable sales load and the estimated offering expenses. Trust shareholders will pay all offering expenses involved with an offering.
[2] | The Reinvestment Plan Agent’s (as defined below under “Dividend Reinvestment Plan”) fees for the handling of the reinvestment of dividends will be paid by the Trust. However, you will pay a $0.02 per share fee incurred in connection with open-market purchases, which will be deducted from the value of the dividend. You will also be charged a $0.02 per share fee if you direct the Reinvestment Plan Agent to sell your common shares held in a dividend reinvestment account. Per share fees include any applicable brokerage commissions the Reinvestment Plan Agent is required to pay.
[3] | The Trust and the Advisor have entered into a fee waiver agreement (the “Fee Waiver Agreement”), pursuant to which the Advisor has contractually agreed to waive the management fee with respect to any portion of the Trust’s assets attributable to investments in any equity and fixed-income mutual funds and exchange-traded funds (“ETFs”) managed by the Advisor or its affiliates that have a contractual management fee, through June 30, 2025. In addition, pursuant to the Fee Waiver Agreement, the Advisor has contractually agreed to waive its management fees by the amount of investment advisory fees the Trust pays to the Advisor indirectly through its investment in money market funds managed by the Advisor or its affiliates, through June 30, 2025. The Fee Waiver Agreement may be terminated at any time, without the payment of any penalty, only by the Trust (upon the vote of a majority of the Trustees who are not “interested persons” (as defined in the Investment Company Act of 1940, as amended (the “Investment Company Act”)) of the Trust (the “Independent Trustees”) or a majority of the outstanding voting securities of the Trust), upon 90 days’ written notice by the Trust to the Advisor.
[4] | The Trust currently pays the Advisor a monthly fee at an annual contractual investment management fee rate of 0.80% of the average weekly value of the Trust’s net assets.

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 6 + Details
Name: | cef_AnnualExpensesTableTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 4 + Details
Name: | cef_BasisOfTransactionFeesNoteTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 + Details
Name: | cef_BusinessDevelopmentCompanyFlag
Namespace Prefix: | cef_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 10 + Details
Name: | cef_CapitalStockLongTermDebtAndOtherSecuritiesAbstract
Namespace Prefix: | cef_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 10 -Subsection 1 -Paragraph a + Details
Name: | cef_CapitalStockTableTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 + Details
Name: | cef_DividendReinvestmentAndCashPurchaseFees
Namespace Prefix: | cef_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 + Details
Name: | cef_ExpenseExampleTableTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 11 + Details
Name: | cef_ExpenseExampleYear01
Namespace Prefix: | cef_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 11 + Details
Name: | cef_ExpenseExampleYears1to10
Namespace Prefix: | cef_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 11 + Details
Name: | cef_ExpenseExampleYears1to3
Namespace Prefix: | cef_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 11 + Details
Name: | cef_ExpenseExampleYears1to5
Namespace Prefix: | cef_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 + Details
Name: | cef_FeeTableAbstract
Namespace Prefix: | cef_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 8 + Details
Name: | cef_GeneralDescriptionOfRegistrantAbstract
Namespace Prefix: | cef_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 8 -Subsection 5 -Paragraph b + Details
Name: | cef_HighestPriceOrBid
Namespace Prefix: | cef_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 8 -Subsection 5 -Paragraph b -Subparagraph Instruction 4 + Details
Name: | cef_HighestPriceOrBidNav
Namespace Prefix: | cef_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 8 -Subsection 5 -Paragraph b -Subparagraph Instructions 4, 5 + Details
Name: | cef_HighestPriceOrBidPremiumDiscountToNavPercent
Namespace Prefix: | cef_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 + Details
Name: | cef_IntervalFundFlag
Namespace Prefix: | cef_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 8 -Subsection 2 -Paragraph b, d + Details
Name: | cef_InvestmentObjectivesAndPracticesTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 8 -Subsection 5 -Paragraph c + Details
Name: | cef_LatestNav
Namespace Prefix: | cef_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 8 -Subsection 5 -Paragraph c + Details
Name: | cef_LatestPremiumDiscountToNavPercent
Namespace Prefix: | cef_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 8 -Subsection 5 -Paragraph c + Details
Name: | cef_LatestSharePrice
Namespace Prefix: | cef_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 8 -Subsection 5 -Paragraph b + Details
Name: | cef_LowestPriceOrBid
Namespace Prefix: | cef_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 8 -Subsection 5 -Paragraph b -Subparagraph Instruction 4 + Details
Name: | cef_LowestPriceOrBidNav
Namespace Prefix: | cef_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 8 -Subsection 5 -Paragraph b -Subparagraph Instructions 4, 5 + Details
Name: | cef_LowestPriceOrBidPremiumDiscountToNavPercent
Namespace Prefix: | cef_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 7 -Subparagraph a + Details
Name: | cef_ManagementFeesPercent
Namespace Prefix: | cef_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 9 + Details
Name: | cef_NetExpenseOverAssetsPercent
Namespace Prefix: | cef_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 + Details
Name: | cef_NewCefOrBdcRegistrantFlag
Namespace Prefix: | cef_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 9 + Details
Name: | cef_OtherAnnualExpensesAbstract
Namespace Prefix: | cef_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 9 + Details
Name: | cef_OtherAnnualExpensesPercent
Namespace Prefix: | cef_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 10 -Subsection 3 + Details
Name: | cef_OtherSecurityDescriptionTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 10 -Subsection 3 + Details
Name: | cef_OtherSecurityTitleTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 5 + Details
Name: | cef_OtherTransactionExpense1Percent
Namespace Prefix: | cef_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 5 + Details
Name: | cef_OtherTransactionExpensesAbstract
Namespace Prefix: | cef_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 5 + Details
Name: | cef_OtherTransactionFeesNoteTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 10 -Subsection 5 + Details
Name: | cef_OutstandingSecuritiesTableTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 10 -Subsection 5 -Paragraph 3 + Details
Name: | cef_OutstandingSecurityHeldShares
Namespace Prefix: | cef_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 10 -Subsection 5 -Paragraph 4 + Details
Name: | cef_OutstandingSecurityNotHeldShares
Namespace Prefix: | cef_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 10 -Subsection 5 -Paragraph 1 + Details
Name: | cef_OutstandingSecurityTitleTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 + Details
Name: | cef_PrimaryShelfFlag
Namespace Prefix: | cef_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 + Details
Name: | cef_PrimaryShelfQualifiedFlag
Namespace Prefix: | cef_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 1 + Details
Name: | cef_PurposeOfFeeTableNoteTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 + Details
Name: | cef_RegisteredClosedEndFundFlag
Namespace Prefix: | cef_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 8 -Subsection 3 -Paragraph a + Details
Name: | cef_RiskFactorsTableTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | cef_RiskTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 + Details
Name: | cef_SalesLoadPercent
Namespace Prefix: | cef_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 10 -Subsection 1 -Paragraph a + Details
Name: | cef_SecurityTitleTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 10 -Subsection 1 -Paragraph a -Subparagraph 2 + Details
Name: | cef_SecurityVotingRightsTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 8 -Subsection 5 -Paragraph b -Subparagraph 4 + Details
Name: | cef_SharePriceTableTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 + Details
Name: | cef_ShareholderTransactionExpensesTableTextBlock
Namespace Prefix: | cef_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 8 + Details
Name: | cef_TotalAnnualExpensesPercent
Namespace Prefix: | cef_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 -Section Item 3 -Subsection 1 -Paragraph Instruction 9 + Details
Name: | cef_WaiversAndReimbursementsOfFeesPercent
Namespace Prefix: | cef_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Securities Act -Number 230 -Section 462 -Subsection b + Details
Name: | dei_AdditionalSecurities462b
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Securities Act -Number 230 -Section 413 -Subsection b + Details
Name: | dei_AdditionalSecuritiesEffective413b
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- Definition Boolean flag that is true when the XBRL content amends previously-filed or accepted submission. + References No definition available. + Details
Name: | dei_AmendmentFlag
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- Definition The approximate date of a commencement of a proposed sale of securities to the public. This element is disclosed in S-1, S-3, S-4, S-11, F-1, F-3 and F-10 filings. + References No definition available. + Details
Name: | dei_ApproximateDateOfCommencementOfProposedSaleToThePublic
Namespace Prefix: | dei_
Data Type: | dei:dateOrAsapItemType
Balance Type: | na
Period Type: | duration

X
- Definition Area code of city + References No definition available. + Details
Name: | dei_CityAreaCode
Namespace Prefix: | dei_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Name of contact personnel + References No definition available. + Details
Name: | dei_ContactPersonnelName
Namespace Prefix: | dei_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Cover page. + References No definition available. + Details
Name: | dei_CoverAbstract
Namespace Prefix: | dei_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form S-3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form F-3 + Details
Name: | dei_DelayedOrContinuousOffering
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form S-3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form F-3 + Details
Name: | dei_DividendOrInterestReinvestmentPlanOnly
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- Definition Boolean flag that is true only for a form used as a registration statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Exchange Act -Number 240 -Section 12 + Details
Name: | dei_DocumentRegistrationStatement
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- Definition The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'. + References No definition available. + Details
Name: | dei_DocumentType
Namespace Prefix: | dei_
Data Type: | dei:submissionTypeItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Securities Act -Number 230 -Section 462 -Subsection e + Details
Name: | dei_EffectiveUponFiling462e
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Securities Act -Section 8 -Subsection c + Details
Name: | dei_EffectiveWhenDeclaredSection8c
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- Definition Address Line 1 such as Attn, Building Name, Street Name + References No definition available. + Details
Name: | dei_EntityAddressAddressLine1
Namespace Prefix: | dei_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Name of the City or Town + References No definition available. + Details
Name: | dei_EntityAddressCityOrTown
Namespace Prefix: | dei_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Code for the postal or zip code + References No definition available. + Details
Name: | dei_EntityAddressPostalZipCode
Namespace Prefix: | dei_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Name of the state or province. + References No definition available. + Details
Name: | dei_EntityAddressStateOrProvince
Namespace Prefix: | dei_
Data Type: | dei:stateOrProvinceItemType
Balance Type: | na
Period Type: | duration

X
- Definition A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Exchange Act -Number 240 -Section 12 -Subsection b-2 + Details
Name: | dei_EntityCentralIndexKey
Namespace Prefix: | dei_
Data Type: | dei:centralIndexKeyItemType
Balance Type: | na
Period Type: | duration

X
- Definition Indicate if registrant meets the emerging growth company criteria. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Exchange Act -Number 240 -Section 12 -Subsection b-2 + Details
Name: | dei_EntityEmergingGrowthCompany
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- Definition Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen. + References No definition available. + Details
Name: | dei_EntityFileNumber
Namespace Prefix: | dei_
Data Type: | dei:fileNumberItemType
Balance Type: | na
Period Type: | duration

X
- Definition One of: N-1A (Mutual Fund), N-1 (Open-End Separate Account with No Variable Annuities), N-2 (Closed-End Investment Company), N-3 (Separate Account Registered as Open-End Management Investment Company), N-4 (Variable Annuity UIT Separate Account), N-5 (Small Business Investment Company), N-6 (Variable Life UIT Separate Account), S-1 or S-3 (Face Amount Certificate Company), S-6 (UIT, Non-Insurance Product). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-T -Number 232 -Section 313 + Details
Name: | dei_EntityInvCompanyType
Namespace Prefix: | dei_
Data Type: | dei:invCompanyType
Balance Type: | na
Period Type: | duration

X
- Definition The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Exchange Act -Number 240 -Section 12 -Subsection b-2 + Details
Name: | dei_EntityRegistrantName
Namespace Prefix: | dei_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Indicate 'Yes' or 'No' if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Securities Act -Number 230 -Section 405 + Details
Name: | dei_EntityWellKnownSeasonedIssuer
Namespace Prefix: | dei_
Data Type: | dei:yesNoItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Securities Act -Number 230 -Section 462 -Subsection d + Details
Name: | dei_ExhibitsOnly462d
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-6 + Details
Name: | dei_InvestmentCompanyActFileNumber
Namespace Prefix: | dei_
Data Type: | dei:fileNumberItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Investment Company Act -Number 270 + Details
Name: | dei_InvestmentCompanyActRegistration
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Investment Company Act -Number 270 + Details
Name: | dei_InvestmentCompanyRegistrationAmendment
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Investment Company Act -Number 270 + Details
Name: | dei_InvestmentCompanyRegistrationAmendmentNumber
Namespace Prefix: | dei_
Data Type: | dei:sequenceNumberItemType
Balance Type: | na
Period Type: | duration

X
- Definition Local phone number for entity. + References No definition available. + Details
Name: | dei_LocalPhoneNumber
Namespace Prefix: | dei_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-2 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form N-6 + Details
Name: | dei_NewEffectiveDateForPreviousFiling
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Securities Act -Number 230 -Section 462 -Subsection c + Details
Name: | dei_NoSubstantiveChanges462c
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Exchange Act -Number 240 -Section 12 + Details
Name: | dei_PostEffectiveAmendment
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Exchange Act -Number 240 -Section 12 + Details
Name: | dei_PreEffectiveAmendment
Namespace Prefix: | dei_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | cef_RiskAxis=cik0001332283_GeneralRisksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_CounterpartyRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_DefensiveInvestingRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_IssuerRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_InflationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_DeflationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_LegalTaxAndRegulatoryRisksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_LiborRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_RiskAssociatedWithRecentMarketEventsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_EconomicAndMonetaryUnionemuAndRedenominationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_MarketDisruptionAndGeopoliticalRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_RegulationAndGovernmentInterventionRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_FailuresOfFuturesCommissionMerchantsAndClearingOrganizationsRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_RegulationAsAcommodityPoolMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_DecisionMakingAuthorityRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_ManagementRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_RelianceOnTheAdvisorRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_RelianceOnServiceProvidersRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_InformationTechnologySystemsRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_CyberSecurityRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_MisconductOfEmployeesAndOfServiceProvidersRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_PotentialConflictsOfInterestOfTheAdvisorAndOthersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_SpecialRisksForHoldersOfRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_PortfolioTurnoverRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_RiskAxis=cik0001332283_AntiTakeoverProvisionsRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_EntityAddressesAddressTypeAxis=dei_BusinessContactMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_SecurityAxis=cik0001332283_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cef_SecurityAxis=cik0001332283_PreferredSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |