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Insurance (Reconciliation of Separate Account Liability) (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022
--- | --- | --- | ---
Separate Account, Liability [Line Items] |  |  |
Separate account liabilities | $ 87,440 | $ 84,965 | $ 104,441
Variable income annuities | 150 |  | 161
Pension risk transfer annuities | 18 |  | 20
Rollforwards Total |  |  |
Separate Account, Liability [Line Items] |  |  |
Separate account liabilities | $ 87,272 |  | $ 104,260

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