Earnings Per Common Share (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator for EPS:
Income from continuing operations	$ 1,691	$ 3,080	$ 1,604	$ 7,640
Less: Net income from continuing operations attributable to noncontrolling interests	198	325	81	712
Less: Preferred stock dividends	8	8	15	15
Income attributable to AIG common shareholders from continuing operations	1,485	2,747	1,508	6,913
Income (loss) from discontinued operations, net of income tax expense	0	(1)	0	(1)
Net income attributable to AIG common shareholders	$ 1,485	$ 2,746	$ 1,508	$ 6,912
Denominator for EPS:
Weighted average common shares outstanding - basic (in shares)	725,754,549	790,897,301	732,175,533	803,532,447
Dilutive common shares (in shares)	4,792,563	9,833,445	5,115,161	9,765,891
Weighted average common shares outstanding - diluted (in shares)	730,547,112	800,730,746	737,290,694	813,298,338
Basic:
Income (loss) from continuing operations (in dollars per share)	$ 2.05	$ 3.47	$ 2.06	$ 8.60
Income from discontinued operations (in dollars per share)	0	0	0	0
Income (loss) attributable to AIG common shareholders (in dollars per share)	2.05	3.47	2.06	8.60
Diluted:
Income (loss) from continuing operations (in dollars per share)	2.03	3.43	2.05	8.50
Income from discontinued operations (in dollars per share)	0	0	0	0
Net income attributable to AIG common shareholders (in dollars per share)	$ 2.03	$ 3.43	$ 2.05	$ 8.50
Number of shares excluded from diluted shares outstanding because the effect would have been anti-dilutive (in shares)	6,600,000	46,600,000	5,500,000	46,200,000