Derivatives and Hedge Accounting - Derivatives not designated as hedging instruments (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ 10,418	$ (365)	$ (3,336)
Policy fees
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	63	61	62
Net investment income - excluding Fortitude Re funds withheld assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ 2	$ 5	$ (8)
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	$ (10)	$ 0	$ 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	$ 3,035	$ 148	$ (508)
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	$ 7,347	$ (575)	$ (2,894)
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	$ (19)	$ (4)	$ 12
Interest rate contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(2,190)	(573)	1,451
Foreign exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	1,149	278	(389)
Equity contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(497)	(736)	211
Commodity contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(13)	(9)	0
Credit contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(4)	(12)	52
Other contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	100	64	61
Embedded derivatives
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ 11,873	$ 623	$ (4,722)