Income Taxes - Schedule of consolidated income tax group credits carryforwards (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, gross	$ 24,804
Net operating loss carryforwards	5,209
Capital loss carryforwards, gross	0
Capital loss carryforwards	0
Foreign tax credit carryforwards	22
Other carryforwards	0
Total AIG U.S. consolidated federal income tax group tax losses and credits carryforwards on a U.S. GAAP basis(a)	5,231
2023
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0
Capital loss carryforwards	0
Foreign tax credit carryforwards	22
Other carryforwards	0
Total AIG U.S. consolidated federal income tax group tax losses and credits carryforwards on a U.S. GAAP basis(a)	22
2024
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0
Capital loss carryforwards	0
Foreign tax credit carryforwards	0
Other carryforwards	0
Total AIG U.S. consolidated federal income tax group tax losses and credits carryforwards on a U.S. GAAP basis(a)	0
2025
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0
Capital loss carryforwards	0
Foreign tax credit carryforwards	0
Other carryforwards	0
Total AIG U.S. consolidated federal income tax group tax losses and credits carryforwards on a U.S. GAAP basis(a)	0
2026
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0
Capital loss carryforwards	0
Foreign tax credit carryforwards	0
Other carryforwards	0
Total AIG U.S. consolidated federal income tax group tax losses and credits carryforwards on a U.S. GAAP basis(a)	0
2027
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0
Capital loss carryforwards	0
Foreign tax credit carryforwards	0
Other carryforwards	0
Total AIG U.S. consolidated federal income tax group tax losses and credits carryforwards on a U.S. GAAP basis(a)	0
2028
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	3,253
Capital loss carryforwards	0
Foreign tax credit carryforwards	0
Other carryforwards	0
Total AIG U.S. consolidated federal income tax group tax losses and credits carryforwards on a U.S. GAAP basis(a)	3,253
Unlimited Carryforwards And Tax Years 2029 And After
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	1,956
Capital loss carryforwards	0
Foreign tax credit carryforwards	0
Other carryforwards	0
Total AIG U.S. consolidated federal income tax group tax losses and credits carryforwards on a U.S. GAAP basis(a)	$ 1,956