Income Taxes -Schedule of net deferred tax assets (liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Valuation Allowance [Line Items]
Valuation allowance	$ (4,250)	$ (1,987)
Net deferred tax assets (liabilities)	14,849	11,479
Net deferred tax assets before valuation allowance	19,099	13,466
Subtotal - Net U.S., foreign, state and local deferred tax assets	15,144	11,714
Net foreign, state and local deferred tax liabilities	(2,771)	(4,860)
Total AIG net deferred tax assets (liabilities)	14,849	11,479
United States
Valuation Allowance [Line Items]
Net U.S. deferred tax assets	12,094	14,656
Net deferred tax assets (liabilities) in AOCI	4,958	(2,772)
Valuation allowance	(3,128)	(859)
Net deferred tax assets (liabilities)	13,924	11,025
Total AIG net deferred tax assets (liabilities)	13,924	11,025
Foreign State And Local
Valuation Allowance [Line Items]
Valuation allowance	(1,122)	(1,128)
Net deferred tax assets (liabilities)	1,220	689
Net deferred tax assets before valuation allowance	2,342	1,817
Net foreign, state and local deferred tax liabilities	(295)	(235)
Total AIG net deferred tax assets (liabilities)	$ 1,220	$ 689