Earnings Per Common Share (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Numerator for EPS:
Income (loss) from continuing operations	$ 3,097	$ 2,700	$ 2,741
Less: Net income attributable to noncontrolling interests	1	0	0
Less: Preferred stock dividends and preferred stock redemption premiums	0	22	29
Income (loss) attributable to AIG common shareholders from continuing operations	3,096	2,678	2,712
Income (loss) from discontinued operations, net of income tax expense	0	(3,626)	1,137
Less: Net income attributable to noncontrolling interests	0	478	235
Net income (loss) from discontinued operations attributable to AIG	0	(4,104)	902
Net income (loss) attributable to AIG common shareholders	$ 3,096	$ (1,426)	$ 3,614
Denominator for EPS:
Weighted average common shares outstanding - basic (in shares)	565,078,072	651,448,307	719,506,291
Dilutive common shares (in shares)	5,271,916	5,834,853	5,726,777
Weighted average common shares outstanding - diluted (in shares)	570,349,988	657,283,160	725,233,068
Basic:
Income from continuing operations (in dollars per share)	$ 5.48	$ 4.11	$ 3.77
Loss from discontinued operations (in dollars per share)	0	(6.30)	1.25
Net income (loss) attributable to AIG common shareholders (in dollars per share)	5.48	(2.19)	5.02
Diluted:
Income from continuing operations (in dollars per share)	5.43	4.07	3.74
Loss from discontinued operations (in dollars per share)	0	(6.24)	1.24
Net income (loss) attributable to AIG common shareholders (in dollars per share)	$ 5.43	$ (2.17)	$ 4.98
Number of shares excluded from diluted shares outstanding because the effect would have been anti-dilutive (in shares)	132,504	103,957	4,350,324