Equity - Schedule of noncontrolling interest (Details) - USD ($) $ in Millions				3 Months Ended		6 Months Ended
	Jun. 26, 2023	Jun. 12, 2023	Sep. 19, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Noncontrolling Interest [Line Items]
Net income attributable to AIG common shareholders				$ 1,485	$ 2,746	$ 1,508	$ 6,912
Contributions from noncontrolling interests				11	$ 5	27	$ 5
Total AIG Shareholders' Equity
Noncontrolling Interest [Line Items]
Net income attributable to AIG common shareholders				1,485		1,508
Contributions from noncontrolling interests	$ (15)	$ (71)	$ 497	(86)		(86)
Change from Net income attributable to AIG common shareholders and changes in AIG's ownership interests				$ 1,399		$ 1,422