Financial Instruments - Derivatives Not Designated as Hedging, Fair Value Table (Details) - USD ($) $ in Millions		Sep. 30, 2024	Dec. 31, 2023
Derivatives Not Designated as Hedging Instruments, Fair Value
Unrealized Gain On Derivative Contracts		$ 43	$ 64
Derivative contracts, at fair value (liability)		$ 685	$ 979
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	[1]	Accrued Liabilities	Accrued Liabilities
Investment Segment
Derivatives Not Designated as Hedging Instruments, Fair Value
Collateral for derivative positions		$ 1,400	$ 1,700
Investment Segment | Not designated as hedging instrument
Derivatives Not Designated as Hedging Instruments, Fair Value
Derivative contracts, at fair value (liability)	[1]	678	979
Investment Segment | Not designated as hedging instrument | Other assets
Derivatives Not Designated as Hedging Instruments, Fair Value
Asset derivatives, Gross		179	64
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	(152)	(25)
Unrealized Gain On Derivative Contracts	[1]	27	39
Investment Segment | Not designated as hedging instrument | Accrued expenses and other liabilities
Derivatives Not Designated as Hedging Instruments, Fair Value
Liability derivatives, Gross		830	1,004
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	(152)	(25)
Investment Segment | Not designated as hedging instrument | Equity contracts | Other assets
Derivatives Not Designated as Hedging Instruments, Fair Value
Asset derivatives, Gross		122	11
Investment Segment | Not designated as hedging instrument | Equity contracts | Accrued expenses and other liabilities
Derivatives Not Designated as Hedging Instruments, Fair Value
Liability derivatives, Gross		829	999
Investment Segment | Not designated as hedging instrument | Credit contracts | Other assets
Derivatives Not Designated as Hedging Instruments, Fair Value
Asset derivatives, Gross		27	39
Investment Segment | Not designated as hedging instrument | Credit contracts | Accrued expenses and other liabilities
Derivatives Not Designated as Hedging Instruments, Fair Value
Liability derivatives, Gross		1	2
Investment Segment | Not designated as hedging instrument | Commodity contracts | Other assets
Derivatives Not Designated as Hedging Instruments, Fair Value
Asset derivatives, Gross		30	14
Investment Segment | Not designated as hedging instrument | Commodity contracts | Accrued expenses and other liabilities
Derivatives Not Designated as Hedging Instruments, Fair Value
Liability derivatives, Gross			3
Energy Segment
Derivatives Not Designated as Hedging Instruments, Fair Value
Asset derivatives, Gross	[2]	(16)	(6)
Liability derivatives, Gross	[2]	(16)	(6)
Unrealized Gain On Derivative Contracts		16	25
Derivative contracts, at fair value (liability)		7
Collateral for derivative positions		3
Energy Segment | Commodity contracts
Derivatives Not Designated as Hedging Instruments, Fair Value
Asset derivatives, Gross		32	31
Liability derivatives, Gross		$ 23	$ 6

[1] Excludes netting of cash collateral received and posted. The total collateral posted at September 30, 2024 and December 31, 2023 was $1.4 billion and $1.7 billion, respectively, across all counterparties, which are included in cash held at consolidated affiliated partnerships and restricted cash in the condensed consolidated balance sheets.

[2] Excludes netting of derivatives primarily related to initial margin requirements of $12 million and $13 million at September 30, 2024 and December 31, 2023, respectively, which was not offset against derivatives liabilities, net in the condensed consolidated balance sheets.