Schedule II - Balance Sheets (Details) - USD ($) $ in Millions		Dec. 14, 2022	Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021	Jan. 01, 2021
Assets:
Short-term investments	[1]		$ 17,200		$ 12,376
Other invested assets	[1]		16,217		15,953
Total investments			322,672		309,150
Cash			2,155	[1]	2,043	[1]	$ 2,198
Deferred income taxes			14,445		14,804			$ 12,963
Other assets			13,089	[1]	12,384	[1]		13,520
Total assets			539,306		522,228			598,841
Liabilities:
Total liabilities			488,005		478,774			532,906
AIG Shareholders’ equity:
Preferred stock			485		485
Common stock			4,766		4,766
Additional paid-in capital			75,810		79,915
Retained earnings			37,516		34,893			16,437
Accumulated other comprehensive loss			(14,037)		(22,616)			11,314
Total AIG shareholders’ equity			45,351		40,970			65,098
Total liabilities and equity			539,306		522,228			$ 598,841
Parent Company
Assets:
Short-term investments			7,782		3,389
Other invested assets			758		1,930
Total investments			8,540		5,319
Cash			10		5		$ 3
Loans to subsidiaries			0		84
Intercompany tax receivable			751		329
Deferred income taxes			4,566		4,992
Investment in consolidated subsidiaries			42,655		44,823
Other assets			909		250
Total assets			58,802		57,026
Liabilities:
Intercompany tax payable			767		1,633
Other liabilities			1,430		1,375
Total liabilities			13,451		16,056
AIG Shareholders’ equity:
Preferred stock			485		485
Common stock			4,766		4,766
Treasury stock			(59,189)		(56,473)
Additional paid-in capital			75,810		79,915
Retained earnings			37,516		34,893
Accumulated other comprehensive loss			(14,037)		(22,616)
Total AIG shareholders’ equity			45,351		40,970
Total liabilities and equity			58,802		57,026
Deconsolidation, Gain (Loss), Amount		$ (114)
Parent Company | Related Party
Assets:
Receivables, Net, Current			1,371		1,224
Accounts Payable, Current			703		1,195
Liabilities:
Notes Payable			443		521
Parent Company | AIGFP Operating
Liabilities:
Debt			18		18
Parent Company | Notes and bonds payable
Liabilities:
Debt			9,098		10,323
Parent Company | Junior subordinated debt
Liabilities:
Debt			$ 992		$ 991

[1] See Note 10 for details of balances associated with variable interest entities.