Insurance Liabilities - Expected future benefits, expenses, and gross premiums (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Individual Retirement | ||
| Liability for Future Policy Benefit, Activity [Line Items] | ||
| Expected future benefits and expense | $ 1,959 | $ 1,747 |
| Expected future gross premiums | 0 | 0 |
| Group Retirement | ||
| Liability for Future Policy Benefit, Activity [Line Items] | ||
| Expected future benefits and expense | 321 | 328 |
| Expected future gross premiums | 0 | 0 |
| Life Insurance | ||
| Liability for Future Policy Benefit, Activity [Line Items] | ||
| Expected future benefits and expense | 38,909 | 38,869 |
| Expected future gross premiums | 29,035 | 29,272 |
| Institutional Markets | ||
| Liability for Future Policy Benefit, Activity [Line Items] | ||
| Expected future benefits and expense | 25,066 | 20,839 |
| Expected future gross premiums | 0 | 0 |
| Corporate and Other * | ||
| Liability for Future Policy Benefit, Activity [Line Items] | ||
| Expected future benefits and expense | 44,530 | 46,038 |
| Expected future gross premiums | $ 2,262 | $ 2,437 |