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, 2024	Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ (539)	$ (1,610)
AIG Life
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	5	5
Policy fees
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	15	16
Net investment income - excluding Fortitude Re funds withheld assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ 0	$ 0
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net Investment Income	Net Investment Income
Net Investment Income - Fortitude Re Funds Withheld Assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ 6	$ (2)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	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	$ 220	$ (391)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Total net realized losses	Total net realized losses
Net Realized Gains (Losses) On Fortitude Re funds Withheld Assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ (77)	$ (1,127)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Total net realized losses	Total net realized losses
Policyholder benefits and claims incurred
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ (3)	$ 3
Change in the fair value of market risk benefits, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(700)	(109)
Interest rate contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	(289)	95
Foreign exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	71	(101)
Equity contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	189	(78)
Commodity contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	0	7
Credit contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	23	(1)
Other contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	16	16
Embedded derivatives
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total	$ (549)	$ (1,548)