Derivatives and Hedge Accounting - Derivatives not designated as hedging instruments (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ (1,610)	$ 3,411
Policy fees
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	16	15
Net investment income - excluding Fortitude Re funds withheld assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ 0	$ (1)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net Investment Income	Net Investment Income	Net Investment Income
Net Investment Income - Fortitude Re Funds Withheld Assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ (2)	$ 0
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net Investment Income	Net Investment Income	Net Investment Income
Net realized gains (losses) - Excluding Fortitude Re Funds Withheld Assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ (391)	$ 607
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Total net realized gains (losses)	Total net realized gains (losses)	Total net realized gains (losses)
Net Realized Gains (Losses) On Fortitude Re funds Withheld Assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ (1,127)	$ 3,262
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Total net realized gains (losses)	Total net realized gains (losses)	Total net realized gains (losses)
Policyholder benefits and claims incurred
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ 3	$ (7)
Change in the fair value of market risk benefits
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(109)	(465)
Interest rate contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	95	(613)
Foreign exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(101)	236
Equity contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(78)	(204)
Commodity contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	7	(4)
Credit contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(1)	(1)
Other contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	16	18
Embedded derivatives
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ (1,548)	$ 3,979