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Investments (Held-to-maturity credit quality indicator) (Details) $ in Millions | Dec. 31, 2022 USD ($)
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Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] |
Debt Securities, Held-to-maturity | $ 8,882
Fixed Maturities Percent of Total Amortized cost | 100.00%
Standard & Poor's, AAA Rating [Member] |
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] |
Debt Securities, Held-to-maturity | $ 1,612
Fixed Maturities Percent of Total Amortized cost | 18.00%
Standard & Poor's, AA Rating [Member] |
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] |
Debt Securities, Held-to-maturity | $ 5,023
Fixed Maturities Percent of Total Amortized cost | 57.00%
Standard & Poor's, A Rating [Member] |
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] |
Debt Securities, Held-to-maturity | $ 1,634
Fixed Maturities Percent of Total Amortized cost | 18.00%
Standard & Poor's, BBB Rating [Member] |
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] |
Debt Securities, Held-to-maturity | $ 593
Fixed Maturities Percent of Total Amortized cost | 7.00%
Standard & Poor's, BB Rating [Member] |
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] |
Debt Securities, Held-to-maturity | $ 20
Fixed Maturities Percent of Total Amortized cost | 0.00%
Other [Member] |
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] |
Debt Securities, Held-to-maturity | $ 0
Fixed Maturities Percent of Total Amortized cost | 0.00%

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