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Separate Accounts (Reconciliation of Separate Account Liability) (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023
--- | --- | --- | ---
Separate Account, Liability [Line Items] |  |  |
Separate account liabilities | $ 90,332 | $ 88,271 | $ 87,440
Variable income annuities | 207 |  | 150
Pension risk transfer annuities | 20 |  | 18
Rollforwards Total |  |  |
Separate Account, Liability [Line Items] |  |  |
Separate account liabilities | $ 90,105 |  | $ 87,272

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