Earnings Per Common Share (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator for EPS:
Income (loss) from continuing operations	$ 1,600	$ (87)
Less: Net income (loss) from continuing operations attributable to noncontrolling interests	384	(117)
Dividends on preferred stock and preferred stock redemption premiums	22	7
Income (loss) attributable to AIG common shareholders from continuing operations	1,194	23
Income (loss) from discontinued operations, net of income tax expense	0	0
Net income (loss) attributable to AIG common shareholders	$ 1,194	$ 23
Denominator for EPS:
Weighted average common shares outstanding - basic (in shares)	682,576,848	738,661,428
Dilutive common shares (in shares)	5,384,670	5,437,758
Weighted average common shares outstanding - diluted (in shares)	687,961,518	744,099,186
Basic:
Income (loss) from continuing operations (in dollars per share)	$ 1.75	$ 0.03
Income from discontinued operations (in dollars per share)	0	0
Net income (loss) attributable to AIG common shareholders (in dollars per share)	1.75	0.03
Diluted:
Income (loss) from continuing operations (in dollars per share)	1.74	0.03
Income from discontinued operations (in dollars per share)	0	0
Net income attributable to AIG common shareholders (in dollars per share)	$ 1.74	$ 0.03
Number of shares excluded from diluted shares outstanding because the effect would have been anti-dilutive (in shares)	100,000	4,500,000