Derivatives and Hedge Accounting - Derivatives not designated as hedging instruments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Fortitude Re funds withheld assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ 1,744	$ (224)	$ 7,830	$ 45
Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	3,443	67	12,415	409
Derivatives not designated as hedging instruments | Excluding Fortitude Re Funds Withheld Assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ 1,679	$ 277	$ 4,547	$ 329
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Total net realized gains	Total net realized gains	Total net realized gains	Total net realized gains
Derivatives not designated as hedging instruments | Policy fees
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ 17	$ 16	$ 47	$ 46
Derivatives not designated as hedging instruments | Net investment income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	8	(1)	10	(6)
Derivatives not designated as hedging instruments | Policyholder benefits and claims incurred
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(5)	(1)	(19)	(5)
Derivatives not designated as hedging instruments | Interest rate contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(528)	(172)	(2,010)	(861)
Derivatives not designated as hedging instruments | Foreign exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	1,010	310	1,976	271
Derivatives not designated as hedging instruments | Equity contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	19	(55)	(107)	(606)
Derivatives not designated as hedging instruments | Commodity contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	4	(5)	(3)	(4)
Derivatives not designated as hedging instruments | Credit contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(3)	0	(4)	(9)
Derivatives not designated as hedging instruments | Other contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	42	17	73	49
Derivatives not designated as hedging instruments | Embedded derivatives
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ 2,899	$ (28)	$ 12,490	$ 1,569