Earnings Per Common Share (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator for EPS:
Income from continuing operations	$ 475	$ 841	$ 1,272	$ 1,178
Less: Preferred stock dividends and preferred stock redemption premiums	0	8	22	15
Income attributable to AIG common shareholders from continuing operations	475	833	1,250	1,163
Income (loss) from discontinued operations, net of income taxes	(4,359)	850	(3,556)	426
Less: Net income attributable to noncontrolling interests	93	198	477	81
Net income (loss) from discontinued operations attributable to AIG	(4,452)	652	(4,033)	345
Net income (loss) attributable to AIG common shareholders	$ (3,977)	$ 1,485	$ (2,783)	$ 1,508
Denominator for EPS:
Weighted average common shares outstanding - basic (in shares)	661,092,967	725,754,549	671,834,907	732,175,533
Dilutive common shares (in shares)	5,862,201	4,792,563	5,623,436	5,115,161
Weighted average common shares outstanding - diluted (in shares)	666,955,168	730,547,112	677,458,343	737,290,694
Basic:
Income from continuing operations (in dollars per share)	$ 0.72	$ 1.15	$ 1.86	$ 1.59
Income (loss) from discontinued operations (in dollars per share)	(6.74)	0.90	(6.00)	0.47
Net income (loss) attributable to AIG common shareholders (in dollars per share)	(6.02)	2.05	(4.14)	2.06
Diluted:
Income from continuing operations (in dollars per share)	0.71	1.14	1.85	1.58
Income (loss) from discontinued operations (in dollars per share)	(6.67)	0.89	(5.96)	0.47
Net income (loss) attributable to AIG common shareholders (in dollars per share)	$ (5.96)	$ 2.03	$ (4.11)	$ 2.05
Number of shares excluded from diluted shares outstanding because the effect would have been anti-dilutive (in shares)	100,000	6,600,000	100,000	5,500,000