XML 81 R70.htm IDEA: XBRL DOCUMENT
v3.25.3

Equity - Preferred Units (Details) $ / shares in Units, $ in Millions |  |  | 3 Months Ended | 6 Months Ended | 81 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 01, 2025 $ / shares | Oct. 03, 2023 $ / shares shares | Sep. 30, 2025 USD ($) subclass $ / shares shares | Sep. 30, 2024 | Sep. 30, 2025 USD ($) subclass $ / shares shares | Sep. 30, 2024 | Sep. 30, 2025 USD ($) subclass $ / shares shares | Mar. 31, 2025 USD ($) $ / shares shares | Jun. 08, 2023 shares | Jun. 07, 2023 shares | Jun. 06, 2023 $ / shares
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  |  | 250,000,000 |  | 250,000,000 |  | 250,000,000 | 250,000,000 |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  |  | $ 0.001 |  | $ 0.001 |  | $ 0.001 | $ 0.001 |  |  |
Valuation (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 800.00
Potential exchange price (in dollars per share) | $ / shares |  |  | $ 840 |  | $ 840 |  | $ 840 |  |  |  |
Number of days preceding exchange date |  |  |  |  | 20 days |  |  |  |  |  |
Series A preferred stock |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  |  | 50,000,000 |  | 50,000,000 |  | 50,000,000 |  |  |  |
Preferred stock, shares issued (in shares) |  |  | 0 |  | 0 |  | 0 | 0 | 34,962 | 34,961 |
Preferred stock, shares outstanding (in shares) |  |  | 0 |  | 0 |  | 0 | 0 | 34,962 |  |
Preferred stock, par value (in dollars per share) | $ / shares |  |  | $ 0.001 |  | $ 0.001 |  | $ 0.001 |  |  |  |
Series B Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Conversion of stock (in shares) |  | 3,768,995 |  |  |  |  |  |  |  |  |
Price per unit (in dollars per share) | $ / shares |  | $ 218.40 |  |  |  |  |  |  |  |  |
Liquidation preference (in dollars per share) | $ / shares |  |  | 10.00 |  | $ 10.00 |  | 10.00 |  |  |  |
Calendar days after original issuance date |  |  |  |  | 210 days |  |  |  |  |  |
Calendar months after original issuance date |  |  |  |  | 60 months |  |  |  |  |  |
Anniversary of original issuance date |  |  |  |  | 1 year |  |  |  |  |  |
Class A common stock |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Conversion of stock (in shares) |  | 172,574 |  |  |  |  |  |  |  |  |
Valuation (in dollars per share) | $ / shares |  |  | $ 10.00 |  | $ 10.00 |  | $ 10.00 |  |  |  |
Initial conversion price, percentage |  |  | 50.00% |  | 50.00% |  | 50.00% |  |  |  |
Units issuable (in shares) |  |  | 51,531,744 |  | 51,531,744 |  | 51,531,744 |  |  |  |
Annual conversion limit |  |  | 9.99% |  | 9.99% |  | 9.99% |  |  |  |
Preferred Series A Subclass 0 |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Quarterly guaranteed payment, annual basis |  |  | 6.00% |  | 6.00% |  | 6.00% |  |  |  |
Quarterly guaranteed payment, fiscal quarter basis |  |  | 1.50% |  | 1.50% |  | 1.50% |  |  |  |
Guaranteed payment accrual | $ |  |  | $ 64.8 |  | $ 64.8 |  | $ 64.8 | $ 55.5 |  |  |
Percentage redeemable |  |  | 12.50% |  | 12.50% |  | 12.50% |  |  |  |
Maximum percentage redeemable |  |  | 50.00% | 50.00% | 50.00% | 50.00% | 50.00% |  |  |  |
Convertible shares of preferred stock, percentage redeemable |  |  | 12.50% |  | 12.50% |  | 12.50% |  |  |  |
Preferred Series A Subclass 1 |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Annual conversion limit | 20.00% |  |  |  |  |  |  |  |  |  |
Weighted average preferred return rate |  |  | 1.59% | 0.00% | 1.59% | 0.00% |  |  |  |  |
Deemed dividend | $ |  |  | $ 151.4 |  | $ 151.4 |  | $ 151.4 |  |  |  |
Maximum conversion price (in dollars per share) | $ / shares | $ 1,440 |  |  |  |  |  |  |  |  |  |
Number of days preceding exchange date | 30 days |  |  |  |  |  |  |  |  |  |
Limit on indebtedness, capital percent of NAV threshold |  |  | 55.00% |  | 55.00% |  | 55.00% |  |  |  |
Limit on indebtedness, debt percent of NAV threshold |  |  | 40.00% |  | 40.00% |  | 40.00% |  |  |  |
Class S Ordinary |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Units issuable (in shares) |  |  | 402,383 |  | 402,383 |  | 402,383 |  |  |  |
Common stock exchange ratio |  |  | 1 |  | 1 |  | 1 |  |  |  |
Class S Preferred |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred stock exchange ratio |  |  | 1.2 |  | 1.2 |  | 1.2 |  |  |  |
Preferred return earned | $ |  |  |  |  |  |  | $ 0.2 |  |  |  |
Series B preferred stock |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  |  | 5,600,000 |  | 5,600,000 |  | 5,600,000 |  |  |  |
Preferred stock, shares issued (in shares) |  |  | 1,543,071 |  | 1,543,071 |  | 1,543,071 | 363,125 |  |  |
Preferred stock, shares outstanding (in shares) |  |  | 1,543,071 |  | 1,543,071 |  | 1,543,071 | 363,125 |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  |  | $ 0.001 |  | $ 0.001 |  | $ 0.001 |  |  |  |
Preferred stock, number of subclasses issued | subclass |  |  | 8 |  | 8 |  | 8 |  |  |  |
Preferred stock, number of subclasses outstanding | subclass |  |  | 7 |  | 7 |  | 7 |  |  |  |
Initial conversion price, percentage |  |  | 75.00% |  | 75.00% |  | 75.00% |  |  |  |
Annual conversion limit |  |  | 4.99% |  | 4.99% |  | 4.99% |  |  |  |
Series B preferred stock | Minimum |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Conversion price (in dollars per share) | $ / shares |  |  | $ 0.22 |  | $ 0.22 |  | $ 0.22 |  |  |  |
Series B preferred stock | Maximum |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Conversion price (in dollars per share) | $ / shares |  |  | 436.80 |  | $ 436.80 |  | 436.80 |  |  |  |
Preferred Series B Subclass 5 |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Conversion of stock (in shares) |  |  |  |  | 136,193 |  |  |  |  |  |
Conversion price (in dollars per share) | $ / shares |  |  | $ 0.69 |  | $ 0.69 |  | $ 0.69 |  |  |  |
Series B Resettable Convertible Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Conversion of stock (in shares) |  |  |  |  | 1,179,946 |  |  |  |  |  |
Preferred Series B Subclass 6 |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Conversion of stock (in shares) |  |  |  |  | 965,576 |  |  |  |  |  |
Preferred Series B Subclass 7 |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Conversion of stock (in shares) |  |  |  |  | 23,333 |  |  |  |  |  |
Preferred Series B Subclass 8 |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Conversion of stock (in shares) |  |  |  |  | 191,037 |  |  |  |  |  |

X
- Definition Common Stock Exchange Ratio + References No definition available. + Details
Name: | ben_CommonStockExchangeRatio
Namespace Prefix: | ben_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Conversion of Stock, Annual Conversion Limit + References No definition available. + Details
Name: | ben_ConversionOfStockAnnualConversionLimit
Namespace Prefix: | ben_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Conversion of Stock, Initial Conversion Price Minimum, Percentage + References No definition available. + Details
Name: | ben_ConversionOfStockInitialConversionPriceMinimumPercentage
Namespace Prefix: | ben_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Conversion of Stock, Maximum Conversion Price + References No definition available. + Details
Name: | ben_ConversionOfStockMaximumConversionPrice
Namespace Prefix: | ben_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Conversion of Stock, Number of Days Preceding Exchange Date + References No definition available. + Details
Name: | ben_ConversionOfStockNumberOfDaysPrecedingExchangeDate
Namespace Prefix: | ben_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Conversion of Stock, Price Per Share Valuation + References No definition available. + Details
Name: | ben_ConversionOfStockPricePerShareValuation
Namespace Prefix: | ben_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Guaranteed Payment Accrual for Preferred Stock + References No definition available. + Details
Name: | ben_GuaranteedPaymentAccrualForPreferredStock
Namespace Prefix: | ben_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Limit on Indebtedness, Capital Percentage of Net Asset Value Threshold + References No definition available. + Details
Name: | ben_LimitOnIndebtednessCapitalPercentageOfNetAssetValueThreshold
Namespace Prefix: | ben_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Limit on Indebtedness, Debt Percent of Net Asset Value Threshold + References No definition available. + Details
Name: | ben_LimitOnIndebtednessDebtPercentOfNetAssetValueThreshold
Namespace Prefix: | ben_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Preferred Series A, Subclass 0, Number of Days Preceding Exchange Date + References No definition available. + Details
Name: | ben_PreferredSeriesASubclass0NumberOfDaysPrecedingExchangeDate
Namespace Prefix: | ben_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Preferred Series A, Subclass 0, Potential Exchange Price + References No definition available. + Details
Name: | ben_PreferredSeriesASubclass0PotentialExchangePrice
Namespace Prefix: | ben_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Preferred Stock, Conversions, Anniversary of Issuance Date + References No definition available. + Details
Name: | ben_PreferredStockConversionsAnniversaryOfIssuanceDate
Namespace Prefix: | ben_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Preferred Stock, Conversions, Days After Issuance Date, Minimum + References No definition available. + Details
Name: | ben_PreferredStockConversionsDaysAfterIssuanceDateMinimum
Namespace Prefix: | ben_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Preferred Stock, Conversions, Months After Issuance Date, Maximum + References No definition available. + Details
Name: | ben_PreferredStockConversionsMonthsAfterIssuanceDateMaximum
Namespace Prefix: | ben_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Preferred Stock Exchange Ratio + References No definition available. + Details
Name: | ben_PreferredStockExchangeRatio
Namespace Prefix: | ben_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Preferred Stock, Number of Subclasses Issued + References No definition available. + Details
Name: | ben_PreferredStockNumberOfSubclassesIssued
Namespace Prefix: | ben_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Preferred Stock, Number of Subclasses Outstanding + References No definition available. + Details
Name: | ben_PreferredStockNumberOfSubclassesOutstanding
Namespace Prefix: | ben_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Preferred Stock, Return Earned + References No definition available. + Details
Name: | ben_PreferredStockReturnEarned
Namespace Prefix: | ben_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Preferred Stock, Weighted Average Return Rate + References No definition available. + Details
Name: | ben_PreferredStockWeightedAverageReturnRate
Namespace Prefix: | ben_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Quarterly Preferred Stock Guaranteed Payment, Percentage of Initial Capital Account Balance, Annual Basis + References No definition available. + Details
Name: | ben_QuarterlyPreferredStockGuaranteedPaymentPercentageOfInitialCapitalAccountBalanceAnnualBasis
Namespace Prefix: | ben_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Quarterly Preferred Stock Guaranteed Payment, Percentage of Initial Capital Account Balance, Fiscal Quarter Basis + References No definition available. + Details
Name: | ben_QuarterlyPreferredStockGuaranteedPaymentPercentageOfInitialCapitalAccountBalanceFiscalQuarterBasis
Namespace Prefix: | ben_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Redemption of Preferred Stock, Conversion of Shares, Percentage of Capital Account Balance + References No definition available. + Details
Name: | ben_RedemptionOfPreferredStockConversionOfSharesPercentageOfCapitalAccountBalance
Namespace Prefix: | ben_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Redemption of Preferred Stock, Maximum Percentage of Capital Account Balance Redeemable + References No definition available. + Details
Name: | ben_RedemptionOfPreferredStockMaximumPercentageOfCapitalAccountBalanceRedeemable
Namespace Prefix: | ben_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Redemption of Preferred Stock, Percentage of Capital Account Balance + References No definition available. + Details
Name: | ben_RedemptionOfPreferredStockPercentageOfCapitalAccountBalance
Namespace Prefix: | ben_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Temporary Equity, Deemed Dividend, Amount + References No definition available. + Details
Name: | ben_TemporaryEquityDeemedDividendAmount
Namespace Prefix: | ben_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 480 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479857/480-10-S50-1 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-13 Reference 6: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 272 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483014/272-10-45-3 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 272 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482987/272-10-50-1 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-13 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-13 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-13 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-13 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-14 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-18 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(2)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(2)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3 + Details
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per share conversion price of preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-13 + Details
Name: | us-gaap_PreferredStockConvertibleConversionPrice
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of common shares issuable upon conversion of preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-13 + Details
Name: | us-gaap_PreferredStockConvertibleSharesIssuable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-4 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-13 + Details
Name: | us-gaap_PreferredStockLiquidationPreference
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-13 + Details
Name: | us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(16)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1 + Details
Name: | us-gaap_PreferredStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares issued for nonredeemable preferred shares and preferred shares redeemable solely at option of issuer. Includes, but is not limited to, preferred shares issued, repurchased, and held as treasury shares. Excludes preferred shares classified as debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-13 + Details
Name: | us-gaap_PreferredStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: 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 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(4)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(16)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(7)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3 + Details
Name: | us-gaap_PreferredStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
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
- Definition The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=ben_PreferredSeriesBSubclass1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=ben_PreferredSeriesASubclass0Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=ben_PreferredSeriesASubclass1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=ben_PreferredSeriesBSubclass5Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=ben_PreferredSeriesBSubclass6Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=ben_PreferredSeriesBSubclass7Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=ben_PreferredSeriesBSubclass8Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |