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Derivatives (Fair Value Hedges) (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Fixed maturity securities AFS |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) | $ (111) | $ (136)
Debt Instruments, Carrying Amount | 454 | 1,411
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | 3 | 1
Mortgage loans |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Debt Instruments, Carrying Amount | 359 | 331
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | (11) | (19)
Future policy benefits [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Debt Instruments, Carrying Amount | (2,863) | (2,816)
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | 191 | 199
Policyholder Account Balances [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Debt Instruments, Carrying Amount | (1,911) | (1,789)
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | $ 25 | $ 104

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