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The amount redeemed by the related party under the manager agreement.

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Percentage fair value of investments under management.

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Amount of consideration transferred in asset acquisition. Includes, but is not limited to, cash, liability incurred by acquirer, and equity interest issued by acquirer.

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Amount of operating dividend income on securities.

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Portion of equity (net assets) in a variable interest entity (VIE) not attributable, directly or indirectly, to the parent entity. That is, this is the portion of equity in a VIE that is attributable to the noncontrolling interest (previously referred to as minority interest).

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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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Related Party Transactions (Details) $ in Millions			1 Months Ended	3 Months Ended		5 Months Ended	8 Months Ended	9 Months Ended		12 Months Ended
Related Party Transactions (Details) $ in Millions	May 05, 2022 item	Oct. 01, 2020	Jul. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Jan. 31, 2023 USD ($)
Related Party Transaction
Number of portfolios \| item	2
Mr. Icahn and affiliates
Related Party Transaction
Noncontrolling Interest in Variable Interest Entity				$ 1,500				$ 1,500		$ 2,100
Percentage of assets under management				35.00%				35.00%		39.00%
Auto Plus
Related Party Transaction
Repayment of notes receivable								$ 7
Brett Icahn
Related Party Transaction
Portfolio manager term	7 years	7 years
Number of lump sum payment after term \| item	1
Investment in funds
Related Party Transaction
Investment funds			$ 650
Investment in funds \| Mr. Icahn and affiliates
Related Party Transaction
Investment funds			256
Amount redeemed in accordance with manager agreement								250	$ 2,000
Investment in funds \| Holding Company
Related Party Transaction
Investment funds			$ 394
Expense sharing arrangement \| Consolidated VIE
Related Party Transaction
Amount of transaction with related party								14	10
Debtor in Possession Financing \| Auto Plus
Related Party Transaction
Aggregate amount											$ 75
Auto Plus Auction \| AEP PLC
Related Party Transaction
Assets acquired										$ 10
Automotive Segment
Related Party Transaction
Revenues from operating leases				$ 15	$ 14			45	43
Automotive Segment \| Deconsolidation of Investment in Auto Plus \| Auto Plus
Related Party Transaction
Revenues from operating leases							$ 3
Purchases from related party						$ 4
Real Estate Segment
Related Party Transaction
Revenues from operating leases				$ 2	$ 3			7	15
Real Estate Segment \| Deconsolidation of Investment in Auto Plus \| Auto Plus
Related Party Transaction
Revenues from operating leases						$ 3
Brett Icahn
Related Party Transaction
Amount redeemed in accordance with manager agreement								4	$ 9
Investment funds total fair value								$ 17		$ 28