Debt - Schedule of Outstanding Debt (Details) - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Long-term debt		$ 8,922	$ 10,606
Consolidated Entities, Excluding Consolidated Investments
Debt Instrument [Line Items]
Long-term debt		8,764	10,375
Consolidated Investments, Including Variable Interest Entities, Primarily Beneficiary
Debt Instrument [Line Items]
Long-term debt	[1]	158	231
Unsecured Debt
Debt Instrument [Line Items]
Long-term debt		8,726	10,338
Unsecured Debt | Notes and bonds payable
Debt Instrument [Line Items]
Long-term debt		7,885	9,079
Unsecured Debt | Junior subordinated debt
Debt Instrument [Line Items]
Long-term debt		602	992
Unsecured Debt | AIG Japan Holdings Kabushiki Kaisha
Debt Instrument [Line Items]
Long-term debt		239	267
Secured Debt | Notes and bonds payable
Debt Instrument [Line Items]
Long-term debt		37	37
Debt Not Guaranteed | Other subsidiaries notes, bonds, loans and mortgages payable
Debt Instrument [Line Items]
Long-term debt		1	0
Debt Not Guaranteed | Debt of consolidated investment entities | Real Estate and Investment Entities
Debt Instrument [Line Items]
Long-term debt		$ 158	79
Debt Not Guaranteed | Debt of consolidated investment entities | Other VIE
Debt Instrument [Line Items]
Long-term debt			$ 152
Minimum | Unsecured Debt | Notes and bonds payable
Debt Instrument [Line Items]
Interest rate (as a percent)		1.58%
Minimum | Unsecured Debt | Junior subordinated debt
Debt Instrument [Line Items]
Interest rate (as a percent)		5.75%
Minimum | Unsecured Debt | AIG Japan Holdings Kabushiki Kaisha
Debt Instrument [Line Items]
Interest rate (as a percent)		0.27%
Minimum | Secured Debt | Notes and bonds payable
Debt Instrument [Line Items]
Interest rate (as a percent)		4.48%
Minimum | Debt Not Guaranteed | Other subsidiaries notes, bonds, loans and mortgages payable
Debt Instrument [Line Items]
Interest rate (as a percent)		9.96%
Minimum | Debt Not Guaranteed | Debt of consolidated investment entities
Debt Instrument [Line Items]
Interest rate (as a percent)		4.15%
Maximum | Unsecured Debt | Notes and bonds payable
Debt Instrument [Line Items]
Interest rate (as a percent)		6.82%
Maximum | Unsecured Debt | Junior subordinated debt
Debt Instrument [Line Items]
Interest rate (as a percent)		8.18%
Maximum | Unsecured Debt | AIG Japan Holdings Kabushiki Kaisha
Debt Instrument [Line Items]
Interest rate (as a percent)		0.73%
Maximum | Secured Debt | Notes and bonds payable
Debt Instrument [Line Items]
Interest rate (as a percent)		7.05%
Maximum | Debt Not Guaranteed | Other subsidiaries notes, bonds, loans and mortgages payable
Debt Instrument [Line Items]
Interest rate (as a percent)		10.46%
Maximum | Debt Not Guaranteed | Debt of consolidated investment entities
Debt Instrument [Line Items]
Interest rate (as a percent)		4.48%

[1] See Note 10 for details of balances associated with variable interest entities.