Financial Instruments - Derivatives Not Designated as Hedging, Fair Value Table (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022
Derivatives Not Designated as Hedging Instruments, Fair Value
Unrealized Gain On Derivative Contracts		$ 64	$ 805
Derivative contracts, at fair value (liability)		$ 979	$ 691
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		$ 1,731	$ 1,436
Investment Segment | Not designated as hedging instrument
Derivatives Not Designated as Hedging Instruments, Fair Value
Derivative contracts, at fair value (liability)	[1]	979	687
Investment Segment | Not designated as hedging instrument | Other assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value
Asset derivatives, Gross		64	839
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	(25)	(34)
Unrealized Gain On Derivative Contracts	[1]	39	805
Investment Segment | Not designated as hedging instrument | Accrued expenses and other liabilities
Derivatives Not Designated as Hedging Instruments, Fair Value
Liability derivatives, Gross		1,004	721
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	(25)	(34)
Investment Segment | Not designated as hedging instrument | Equity Contracts | Other assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value
Asset derivatives, Gross		11	392
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		999	719
Investment Segment | Not designated as hedging instrument | Credit Contracts | Other assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value
Asset derivatives, Gross		39	447
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		2	1
Investment Segment | Not designated as hedging instrument | Commodity Contracts | Other assets [Member]
Derivatives Not Designated as Hedging Instruments, Fair Value
Asset derivatives, Gross		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	$ 1

[1] Excludes netting of cash collateral received and posted. The total collateral posted at December 31, 2023 and 2022 was $1,731 million and $1,436 million, respectively, across all counterparties, which are included in cash held at consolidated affiliated partnerships and restricted cash in the consolidated balance sheets.