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Derivatives (Fair Value Hedges) (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Derivative Instruments, Gain (Loss) [Line Items] |  |
Derivative, Collateral, Right to Reclaim Cash | $ 80 | $ 98
Fixed maturity securities AFS | Designated as Hedging Instrument [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) | (100) | (111)
Debt Instruments, Carrying Amount | 370 | 454
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | 3 | 3
Mortgages | Designated as Hedging Instrument [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Debt Instruments, Carrying Amount | 223 | 359
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | (5) | (11)
Future policy benefits [Member] | Designated as Hedging Instrument [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Debt Instruments, Carrying Amount | 2,661 | 2,863
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | 337 | 191
Policyholder Account Balances [Member] | Designated as Hedging Instrument [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Debt Instruments, Carrying Amount | 2,252 | 1,911
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | $ 170 | $ 25

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