Schedule II - Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Statement of Income Captions [Line Items]
Net income attributable to AIG	$ 3,643	$ 10,227	$ 10,367
Other comprehensive loss	5,940	(32,303)	(5,424)
Comprehensive income (loss) attributable to AIG	8,284	(19,576)	5,042
Parent Company
Condensed Statement of Income Captions [Line Items]
Net income attributable to AIG	3,643	10,227	10,367
Other comprehensive loss	4,641	(29,803)	(5,325)
Comprehensive income (loss) attributable to AIG	$ 8,284	$ (19,576)	$ 5,042