Schedule II - Statements of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Condensed Statement of Income Captions [Line Items]
Net income (loss) attributable to AIG	$ 898	$ 459	$ (3,977)	$ 1,216	$ 93	$ 2,027	$ 1,493	$ 30	$ (1,404)	$ 3,643	$ 10,227
Other comprehensive income (loss) related to continued operations									6,105	5,940	(32,303)
Other comprehensive income (loss) related to discontinued operations									(945)	3,401	(25,235)
Corebridge Deconsolidation									7,214	0	0
Comprehensive income (loss) attributable to AIG									4,997	8,284	(19,576)
Parent Company
Condensed Statement of Income Captions [Line Items]
Net income (loss) attributable to AIG									(1,404)	3,643	10,227
Other comprehensive income (loss) related to continued operations									132	1,240	(4,568)
Other comprehensive income (loss) related to discontinued operations									(945)	3,401	(25,235)
Corebridge Deconsolidation									7,214	0	0
Comprehensive income (loss) attributable to AIG									$ 4,997	$ 8,284	$ (19,576)