Equity and Redeemable Noncontrolling Interest - AIG Bermuda tax payment allocation agreement (Details) - USD ($) $ in Millions |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Equity [Abstract] | ||
| Unrecognized Tax Benefits, Increase (Decrease) From Tax Payment Agreement | $ 353 | $ 203 |