Schedule II - Balance Sheets (Details) - USD ($) $ in Millions		Dec. 31, 2024	Jun. 30, 2024	Jun. 09, 2024	Dec. 31, 2023	Dec. 31, 2022
Assets:
Short-term investments	[1]	$ 14,462			$ 12,865
Other investments		9,828			6,368
Total investments		93,613			90,244
Cash		1,302			1,540	$ 1,482
Deferred income tax assets		4,956			6,186
Other assets	[1]	4,735			5,425
Total assets		161,322			539,306
Liabilities:
Long-term debt		8,922			10,606
Total liabilities		118,772			488,005
AIG Shareholders’ equity:
Preferred stock		0			485
Additional paid-in capital		75,348			75,810
Retained earnings		35,079			37,516
Accumulated other comprehensive loss		(7,099)			(14,037)
Total AIG shareholders’ equity		42,521			45,351
Total liabilities and equity		161,322			539,306
Corebridge Financial Inc
Assets:
Retained investment in Corebridge using fair value option		3,810		$ 12,409	0
Other investments			$ 817
Discontinued Operations
Assets:
Assets of discontinued operations - net		0			378,748
Parent Company
Assets:
Short-term investments		8,360			7,782
Other investments		393			758
Total investments		12,563			8,540
Cash		4			10	$ 5
Intercompany tax receivable		288			379
Deferred income tax assets		3,380			4,566
Investment in consolidated subsidiaries		35,312			36,544
Other assets		755			1,335
Total assets		54,233			58,802
Liabilities:
Intercompany tax payable		551			767
Other liabilities		1,144			1,451
Total liabilities		11,712			13,451
AIG Shareholders’ equity:
Preferred stock		0			485
Common stock		4,766			4,766
Treasury stock		(65,573)			(59,189)
Additional paid-in capital		75,348			75,810
Retained earnings		35,079			37,516
Accumulated other comprehensive loss		(7,099)			(14,037)
Total AIG shareholders’ equity		42,521			45,351
Total liabilities and equity		54,233			58,802
Parent Company | Discontinued Operations
Assets:
Assets of discontinued operations - net		0			6,111
Parent Company | Related Party
Assets:
Due from affiliates - net		1,931			1,317
Liabilities:
Due to affiliates		1,031			682
Loans from subsidiaries		462			443
Parent Company | AIGFP Operating
Liabilities:
Long-term debt		18			18
Parent Company | Notes and bonds payable
Liabilities:
Long-term debt		7,904			9,098
Parent Company | Junior subordinated debt
Liabilities:
Long-term debt		$ 602			$ 992

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