Condensed Consolidated Balance Sheets (Parenthetical - equity) - $ / shares	Mar. 31, 2022	Dec. 31, 2021
AIG shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 5.00	$ 5
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	20,000	20,000
Preferred stock liquidation preference	$ 500	$ 500
Common stock, par value (in dollars per share)	$ 2.50	$ 2.5
Common stock, shares authorized	5,000,000,000	5,000,000,000
Common stock, shares issued	1,906,671,492	1,906,671,492
Treasury stock, shares of common stock	1,106,447,402	1,087,984,129