Debt - AIGLH Notes and Junior Subordinated Debentures (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Debt Instrument [Line Items] | ||
| Total long-term debt | $ 7,927 | $ 427 |
| AIGLH junior subordinated debentures | AIGLH junior subordinated debentures | ||
| Debt Instrument [Line Items] | ||
| Total long-term debt | 227 | 227 |
| AIGLH notes | AIGLH notes | ||
| Debt Instrument [Line Items] | ||
| Total long-term debt | 200 | $ 200 |
| AIGLH Junior Subordinated Debt, Due July 2030 | AIGLH notes | ||
| Debt Instrument [Line Items] | ||
| Total long-term debt | $ 54 | |
| Interest rate (as a percent) | 8.50% | |
| AIGLH Junior Subordinated Debt, Due March 2046 | AIGLH notes | ||
| Debt Instrument [Line Items] | ||
| Total long-term debt | $ 142 | |
| Interest rate (as a percent) | 8.125% | |
| AIGLH Junior Subordinated Debt, Due December 2045 | AIGLH notes | ||
| Debt Instrument [Line Items] | ||
| Total long-term debt | $ 31 | |
| Interest rate (as a percent) | 7.57% | |
| Consolidated Entities, Excluding Consolidated Investments | AIGLH notes | ||
| Debt Instrument [Line Items] | ||
| Total long-term debt | $ 427 |