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Investments (Credit Loss Expense Incurred) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] |  |  |  |
Gross credit loss expense recognized in net income (loss) | $ (5) | $ (8) | $ (11) | $ (9)
Net credit loss expense recognized in net income (loss) | (5) | (8) | (11) | (9)
Corporate Bonds [Member] |  |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] |  |  |  |
Gross credit loss expense recognized in net income (loss) |  | $ (8) | (2) | $ (9)
RMBS [Member] |  |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] |  |  |  |
Gross credit loss expense recognized in net income (loss) | (2) |  | (4) |
ABS [Member] |  |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Line Items] |  |  |  |
Gross credit loss expense recognized in net income (loss) | $ (3) |  | $ (5) |

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- Definition Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded, Net of associated amortization + References No definition available. + Details
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