Derivatives and Hedge Accounting - Balance sheet location (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Fixed maturity securities | ||
| Derivative [Line Items] | ||
| Carrying amount of hedged assets | $ 6,520 | $ 7,478 |
| Commercial mortgage and other loans | ||
| Derivative [Line Items] | ||
| Carrying amount of hedged assets | 0 | 0 |
| Policyholder contract deposits(b) | ||
| Derivative [Line Items] | ||
| Carrying amount of hedged liabilities | (2,218) | (1,500) |
| Cumulative effect of change in accounting principle | Fixed maturity securities | ||
| Derivative [Line Items] | ||
| Carrying amount of hedged assets | 0 | 0 |
| Cumulative effect of change in accounting principle | Commercial mortgage and other loans | ||
| Derivative [Line Items] | ||
| Carrying amount of hedged assets | (25) | (6) |
| Cumulative effect of change in accounting principle | Policyholder contract deposits(b) | ||
| Derivative [Line Items] | ||
| Carrying amount of hedged liabilities | $ (68) | $ 79 |