XML 9 R1.htm IDEA: XBRL DOCUMENT
v3.25.0.1

N-2 - USD ($) |  |  | 3 Months Ended
--- | --- | --- | ---
Feb. 07, 2025 | Jan. 31, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023
Cover [Abstract] |  |  |  |  |  |  |  |  |  |  |
Entity Central Index Key |  | 0001222401 |  |  |  |  |  |  |  |  |
Amendment Flag |  | false |  |  |  |  |  |  |  |  |
Document Type |  | 424B2 |  |  |  |  |  |  |  |  |
Entity Registrant Name |  | BLACKROCK CORPORATE HIGH YIELD FUND, INC. |  |  |  |  |  |  |  |  |
Fee Table [Abstract] |  |  |  |  |  |  |  |  |  |  |
Shareholder Transaction Expenses [Table Text Block] |  |
Shareholder Transaction Expenses |  |  |  |
Sales load paid by you (as a percentage of offering price) |  |  | 1.00 | % (1)
Offering expenses borne by the Fund (as a percentage of offering price) |  |  | 0.02 | % (2)
Dividend reinvestment plan fees |  |  | $0.02 per share for open-market purchases of common shares (3) |
Dividend reinvestment plan sale transaction fee |  |  | $2.50 | (3)
(1) | Represents the estimated commission with respect to the Fund’s common shares being sold in this offering. There is no guarantee that there will be any sales of the Fund’s common shares pursuant to this Prospectus Supplement and the accompanying Prospectus. Actual sales of the Fund’s common shares under this Prospectus Supplement and the accompanying Prospectus, if any, may be less than as set forth under “Capitalization” below. In addition, the price per share of any such sale may be greater than or less than the price set forth under “Capitalization” below, depending on market price of the Fund’s common shares at the time of any such sale.
(2) | Based on a sale price per share of $9.90, which represents the last reported sale price per share of the Fund’s common shares on the NYSE on January 31 2025. Assumes all of the common shares being offered by this Prospectus Supplement and the accompanying Prospectus are sold. Represents the initial offering costs incurred by the Fund in connection with this offering, which are estimated to be $203,769. Offering costs generally include, but are not limited to, the preparation, review and filing with the SEC of the Fund’s registration statement, the preparation, review and filing of any associated marketing or similar materials, costs associated with the printing, mailing or other distribution of the Prospectus Supplement and the accompanying Prospectus and/or marketing materials, associated filing fees, NYSE listing fees, and legal and auditing fees associated with the offering.
(3) | Computershare Trust Company, N.A.’s (the “Reinvestment Plan Agent”) fees for the handling of the reinvestment of dividends will be paid by the Fund. 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 $2.50 sales fee and pay a $0.15 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] | $ 2.5 |  |  |  |  |  |  |  |  |
Other Transaction Expenses [Abstract] |  |  |  |  |  |  |  |  |  |  |
Other Transaction Expenses [Percent] | [3] | 0.02% |  |  |  |  |  |  |  |  |
Annual Expenses [Table Text Block] |  |
Estimated Annual Expenses (as a percentage of net assets attributable to common shares) |  |  |  |
Management fees (4)(5) |  |  | 0.85 | %
Interest Payments on Borrowed Fund (6) |  |  | 2.44 | %
Other Expenses |  |  | 0.06 | %
Total Annual Expenses |  |  | 3.35 | %
Fee Waivers and/or Expense Reimbursements (5) |  |  | — |
Total Annual Expenses after Fee Waivers and/or Expense Reimbursements (5) |  |  | 3.35 | %
(4) | The Fund currently pays the Advisor a contractual management fee at an annual rate of 0.60% based on an aggregate of (i) the Fund’s average daily Net Assets and (ii) the proceeds of any outstanding debt securities or borrowings used for leverage (together, “average daily Managed Assets”). “Net Assets” means the total assets of the Fund minus the sum of the accrued liabilities. The liquidation preference of any outstanding preferred stock (other than accumulated dividends) is not considered a liability in determining the Fund’s net asset value. The Fund uses leverage in the form of a credit facility, which for the period of 12 months ended at December 31, 2023, amounted to approximately 29.0% of the Fund’s Managed Assets (approximately 40.9% of the Fund’s net assets). “Managed Assets” means the total assets of the Fund minus the sum of the Fund’s accrued liabilities (other than the aggregate indebtedness constituting financial leverage). The Fund’s net assets attributable to common stock are the Fund’s Managed Assets minus the value of the Fund’s assets attributable to indebtedness constituting financial leverage. Thus, when the Fund uses leverage, its net assets attributable to common stock are less than its Managed Assets and its expenses (including the management fee) stated as a percentage of its net assets attributable to common stock are greater than they would be if stated as a percentage of its Managed Assets. This table reflects the fact that you, as a common shareholder, bear the expenses of the Fund’s use of leverage in the form of higher fees as a percentage of the Fund’s net assets attributable to common stock than if the Fund did not use leverage.
(5) | The Fund 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 Fund’s assets attributable to investments in any equity and fixed-income mutual funds and exchange-traded funds managed by the Advisor or its affiliates that have a contractual management fee, through June 30, 2026. 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 Fund pays to the Advisor indirectly through its investment in money market funds managed by the Advisor or its affiliates, through June 30, 2026. The Fee Waiver Agreement may be terminated at any time, without the payment of any penalty, only by the Fund (upon the vote of a majority of the Directors who are not “interested persons” (as defined in the Investment Company Act) of the Fund (the “Independent Directors”)) or a majority of the outstanding voting securities of the Fund, upon 90 days’ written notice by the Fund to the Advisor.
(6) | Reflects leverage, in the form of a credit facility, in an amount equal to approximately 29.0% of the Fund’s Managed Assets for the period of 12 months ended at December 31, 2023. The interest expense borne by the Fund will vary over time in accordance with the level of the Fund’s use of leverage and variations in market interest rates. Interest expense is required to be treated as an expense of the Fund for accounting purposes.
Management Fees [Percent] | [4],[5] | 0.85% |  |  |  |  |  |  |  |  |
Interest Expenses on Borrowings [Percent] | [6] | 2.44% |  |  |  |  |  |  |  |  |
Other Annual Expenses [Abstract] |  |  |  |  |  |  |  |  |  |  |
Other Annual Expenses [Percent] |  | 0.06% |  |  |  |  |  |  |  |  |
Total Annual Expenses [Percent] |  | 3.35% |  |  |  |  |  |  |  |  |
Waivers and Reimbursements of Fees [Percent] | [4] | 0.00% |  |  |  |  |  |  |  |  |
Net Expense over Assets [Percent] | [4] | 3.35% |  |  |  |  |  |  |  |  |
Expense Example [Table Text Block] |  | Example The following example illustrates the expenses (including the sales load of $10.00 and offering costs of $0.13) that you would pay on a $1,000 investment in common shares, assuming (i) total net annual expenses of 3.35% of net assets attributable to common shares and (ii) a 5% annual return:
|  | 1 Year |  |  | 3 Years |  |  | 5 Years |  |  | 10 Years |
Total expenses incurred |  | $ | 44 |  |  | $ | 112 |  |  | $ | 183 |  |  | $ | 370 |
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 net asset value. Actual expenses may be greater or less than those assumed. Moreover, the Fund’s actual rate of return may be greater or less than the hypothetical 5% return shown in the example. |  |  |  |  |  |  |  |  |
Expense Example, Year 01 |  | $ 44 |  |  |  |  |  |  |  |  |
Expense Example, Years 1 to 3 |  | 112 |  |  |  |  |  |  |  |  |
Expense Example, Years 1 to 5 |  | 183 |  |  |  |  |  |  |  |  |
Expense Example, Years 1 to 10 |  | $ 370 |  |  |  |  |  |  |  |  |
Purpose of Fee Table , Note [Text Block] |  | The following table and example are intended to assist you in understanding the various costs and expenses directly or indirectly associated with investing in our common shares. |  |  |  |  |  |  |  |  |
Basis of Transaction Fees, Note [Text Block] |  | as a percentage of offering price |  |  |  |  |  |  |  |  |
Other Transaction Fees, Note [Text Block] |  | Computershare Trust Company, N.A.’s (the “Reinvestment Plan Agent”) fees for the handling of the reinvestment of dividends will be paid by the Fund. 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 $2.50 sales fee and pay a $0.15 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. |  |  |  |  |  |  |  |  |
Management Fee not based on Net Assets, Note [Text Block] |  | The Fund currently pays the Advisor a contractual management fee at an annual rate of 0.60% based on an aggregate of (i) the Fund’s average daily Net Assets and (ii) the proceeds of any outstanding debt securities or borrowings used for leverage (together, “average daily Managed Assets”). “Net Assets” means the total assets of the Fund minus the sum of the accrued liabilities. The liquidation preference of any outstanding preferred stock (other than accumulated dividends) is not considered a liability in determining the Fund’s net asset value. The Fund uses leverage in the form of a credit facility, which for the period of 12 months ended at December 31, 2023, amounted to approximately 29.0% of the Fund’s Managed Assets (approximately 40.9% of the Fund’s net assets). “Managed Assets” means the total assets of the Fund minus the sum of the Fund’s accrued liabilities (other than the aggregate indebtedness constituting financial leverage). The Fund’s net assets attributable to common stock are the Fund’s Managed Assets minus the value of the Fund’s assets attributable to indebtedness constituting financial leverage. Thus, when the Fund uses leverage, its net assets attributable to common stock are less than its Managed Assets and its expenses (including the management fee) stated as a percentage of its net assets attributable to common stock are greater than they would be if stated as a percentage of its Managed Assets. This table reflects the fact that you, as a common shareholder, bear the expenses of the Fund’s use of leverage in the form of higher fees as a percentage of the Fund’s net assets attributable to common stock than if the Fund did not use leverage. |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |
Investment Objectives and Practices [Text Block] |  | The Fund’s investment objective is to provide shareholders with current income. The Fund’s secondary investment objective is to provide shareholders with capital appreciation. |  |  |  |  |  |  |  |  |
Share Price [Table Text Block] |  | 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 |
December 31, 2024 |  | $ | 10.11 |  |  | $ | 9.64 |  |  | $ | 9.87 |  |  | $ | 9.64 |  |  |  | 2.43 | % |  |  | 0.00 | % |  |  | 31,471,256 |
September 30, 2024 |  | $ | 10.10 |  |  | $ | 9.59 |  |  | $ | 9.81 |  |  | $ | 9.58 |  |  |  | 2.96 | % |  |  | 0.10 | % |  |  | 29,991,036 |
June 30, 2024 |  | $ | 9.93 |  |  | $ | 9.26 |  |  | $ | 9.60 |  |  | $ | 9.47 |  |  |  | 3.44 | % |  |  | (2.22 | )% |  |  | 22,921,620 |
March 31, 2024 |  | $ | 9.88 |  |  | $ | 9.38 |  |  | $ | 9.73 |  |  | $ | 9.58 |  |  |  | 1.54 | % |  |  | (2.09 | )% |  |  | 27,063,172 |
December 31, 2023 |  | $ | 9.56 |  |  | $ | 8.24 |  |  | $ | 9.74 |  |  | $ | 8.87 |  |  |  | (1.85 | )% |  |  | (7.10 | )% |  |  | 32,227,355 |
September 30, 2023 |  | $ | 9.28 |  |  | $ | 8.60 |  |  | $ | 9.41 |  |  | $ | 9.18 |  |  |  | (1.38 | )% |  |  | (6.32 | )% |  |  | 31,818,726 |
June 30, 2023 |  | $ | 8.92 |  |  | $ | 8.41 |  |  | $ | 9.39 |  |  | $ | 9.29 |  |  |  | (5.01 | )% |  |  | (9.47 | )% |  |  | 27,377,682 |
March 31, 2023 |  | $ | 9.43 |  |  | $ | 8.28 |  |  | $ | 9.85 |  |  | $ | 9.13 |  |  |  | (4.26 | )% |  |  | (9.31 | )% |  |  | 39,758,961 |
As of January 31, 2025, the NAV per common share of the Fund was $9.74 and the market price per common share was $9.90, representing a premium to NAV of 1.64%. Common shares of the Fund have historically traded at both a premium and discount to NAV. As of January 31, 2025, the Fund had outstanding 154,445,033 common shares. |  |  |  |  |  |  |  |  |
Capital Stock, Long-Term Debt, and Other Securities [Abstract] |  |  |  |  |  |  |  |  |  |  |
Outstanding Security, Held [Shares] |  |  | 154,445,033 |  |  |  |  |  |  |  |
Common Shares [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 |  |  |  | $ 9.64 | $ 9.59 | $ 9.26 | $ 9.38 | $ 8.24 | $ 8.6 | $ 8.41 | $ 8.28
Highest Price or Bid |  |  |  | 10.11 | 10.1 | 9.93 | 9.88 | 9.56 | 9.28 | 8.92 | 9.43
Lowest Price or Bid, NAV |  |  |  | 9.64 | 9.58 | 9.47 | 9.58 | 8.87 | 9.18 | 9.29 | 9.13
Highest Price or Bid, NAV |  |  |  | $ 9.87 | $ 9.81 | $ 9.6 | $ 9.73 | $ 9.74 | $ 9.41 | $ 9.39 | $ 9.85
Highest Price or Bid, Premium (Discount) to NAV [Percent] |  |  |  | 2.43% | 2.96% | 3.44% | 1.54% | (1.85%) | (1.38%) | (5.01%) | (4.26%)
Lowest Price or Bid, Premium (Discount) to NAV [Percent] |  |  |  | 0.00% | 0.10% | (2.22%) | (2.09%) | (7.10%) | (6.32%) | (9.47%) | (9.31%)
Share Price |  |  | $ 9.9 |  |  |  |  |  |  |  |
NAV Per Share |  |  | $ 9.74 |  |  |  |  |  |  |  |
Latest Premium (Discount) to NAV [Percent] |  |  | 1.64% |  |  |  |  |  |  |  |
[1] | Represents the estimated commission with respect to the Fund’s common shares being sold in this offering. There is no guarantee that there will be any sales of the Fund’s common shares pursuant to this Prospectus Supplement and the accompanying Prospectus. Actual sales of the Fund’s common shares under this Prospectus Supplement and the accompanying Prospectus, if any, may be less than as set forth under “Capitalization” below. In addition, the price per share of any such sale may be greater than or less than the price set forth under “Capitalization” below, depending on market price of the Fund’s common shares at the time of any such sale.
[2] | Computershare Trust Company, N.A.’s (the “Reinvestment Plan Agent”) fees for the handling of the reinvestment of dividends will be paid by the Fund. 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 $2.50 sales fee and pay a $0.15 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] | Based on a sale price per share of $9.90, which represents the last reported sale price per share of the Fund’s common shares on the NYSE on January 31 2025. Assumes all of the common shares being offered by this Prospectus Supplement and the accompanying Prospectus are sold. Represents the initial offering costs incurred by the Fund in connection with this offering, which are estimated to be $203,769. Offering costs generally include, but are not limited to, the preparation, review and filing with the SEC of the Fund’s registration statement, the preparation, review and filing of any associated marketing or similar materials, costs associated with the printing, mailing or other distribution of the Prospectus Supplement and the accompanying Prospectus and/or marketing materials, associated filing fees, NYSE listing fees, and legal and auditing fees associated with the offering.
[4] | The Fund 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 Fund’s assets attributable to investments in any equity and fixed-income mutual funds and exchange-traded funds managed by the Advisor or its affiliates that have a contractual management fee, through June 30, 2026. 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 Fund pays to the Advisor indirectly through its investment in money market funds managed by the Advisor or its affiliates, through June 30, 2026. The Fee Waiver Agreement may be terminated at any time, without the payment of any penalty, only by the Fund (upon the vote of a majority of the Directors who are not “interested persons” (as defined in the Investment Company Act) of the Fund (the “Independent Directors”)) or a majority of the outstanding voting securities of the Fund, upon 90 days’ written notice by the Fund to the Advisor.
[5] | The Fund currently pays the Advisor a contractual management fee at an annual rate of 0.60% based on an aggregate of (i) the Fund’s average daily Net Assets and (ii) the proceeds of any outstanding debt securities or borrowings used for leverage (together, “average daily Managed Assets”). “Net Assets” means the total assets of the Fund minus the sum of the accrued liabilities. The liquidation preference of any outstanding preferred stock (other than accumulated dividends) is not considered a liability in determining the Fund’s net asset value. The Fund uses leverage in the form of a credit facility, which for the period of 12 months ended at December 31, 2023, amounted to approximately 29.0% of the Fund’s Managed Assets (approximately 40.9% of the Fund’s net assets). “Managed Assets” means the total assets of the Fund minus the sum of the Fund’s accrued liabilities (other than the aggregate indebtedness constituting financial leverage). The Fund’s net assets attributable to common stock are the Fund’s Managed Assets minus the value of the Fund’s assets attributable to indebtedness constituting financial leverage. Thus, when the Fund uses leverage, its net assets attributable to common stock are less than its Managed Assets and its expenses (including the management fee) stated as a percentage of its net assets attributable to common stock are greater than they would be if stated as a percentage of its Managed Assets. This table reflects the fact that you, as a common shareholder, bear the expenses of the Fund’s use of leverage in the form of higher fees as a percentage of the Fund’s net assets attributable to common stock than if the Fund did not use leverage.
[6] | Reflects leverage, in the form of a credit facility, in an amount equal to approximately 29.0% of the Fund’s Managed Assets for the period of 12 months ended at December 31, 2023. The interest expense borne by the Fund will vary over time in accordance with the level of the Fund’s use of leverage and variations in market interest rates. Interest expense is required to be treated as an expense of the Fund for accounting purposes.

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 -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 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 -Section Item 3 -Subsection 1 -Paragraph Instruction 8 + Details
Name: | cef_InterestExpensesOnBorrowingsPercent
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 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_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 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 b + Details
Name: | cef_ManagementFeeNotBasedOnNetAssetsNoteTextBlock
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 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 -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 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_OtherTransactionExpensesPercent
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_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 -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 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 -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 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
- 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 Cover page. + References No definition available. + Details
Name: | dei_CoverAbstract
Namespace Prefix: | dei_
Data Type: | xbrli:stringItemType
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
- 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 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 Net asset value per share or per unit of investments in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes fair value disclosure. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479168/946-830-55-12 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477796/946-210-45-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 205 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478494/946-205-50-7 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 205 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478494/946-205-50-7 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478448/946-505-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.6-05(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479170/946-210-S99-2 + Details
Name: | us-gaap_NetAssetValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Price of a single share of a number of saleable stocks of a company. + References No definition available. + Details
Name: | us-gaap_SharePrice
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=cik0001222401_CommonSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |