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Investments (Credit Losses Recognized In Earnings on Fixed Maturity Securities Held by the Company) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Available-for-sale |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | $ 138 | $ 114 | $ 133
Additions to allowance for credit losses not previously recorded | 161 | 124 | 96
Reductions for securities sold during the period | (162) | (86) | (57)
Reductions for securities with intent to sell | 0 | 81 |
Additions (reductions) on securities with previous allowance | 40 | 67 | (57)
Write-offs charged against the allowance | (17) |  |
Reclassified to “Assets held-for sale” |  |  | (1)
Balance, ending of period | 160 | 138 | 114
Available-for-sale | U.S. Treasury securities and obligations of U.S. government authorities and agencies |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | 0 | 0 | 0
Additions to allowance for credit losses not previously recorded | 0 | 0 | 0
Reductions for securities sold during the period | 0 | 0 | 0
Reductions for securities with intent to sell | 0 | 0 |
Additions (reductions) on securities with previous allowance | 0 | 0 | 0
Write-offs charged against the allowance | 0 |  |
Reclassified to “Assets held-for sale” |  |  | 0
Balance, ending of period | 0 | 0 | 0
Available-for-sale | Foreign government bonds |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | 1 | 7 | 0
Additions to allowance for credit losses not previously recorded | 62 | 11 | 7
Reductions for securities sold during the period | 0 | (6) | 0
Reductions for securities with intent to sell | 0 | 13 |
Additions (reductions) on securities with previous allowance | (10) | 2 | 0
Write-offs charged against the allowance | 0 |  |
Reclassified to “Assets held-for sale” |  |  | 0
Balance, ending of period | 53 | 1 | 7
Available-for-sale | Corporate securities |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | 136 | 107 | 123
Additions to allowance for credit losses not previously recorded | 99 | 109 | 89
Reductions for securities sold during the period | (162) | (80) | (48)
Reductions for securities with intent to sell | 0 | 68 |
Additions (reductions) on securities with previous allowance | 49 | 68 | (56)
Write-offs charged against the allowance | (17) |  |
Reclassified to “Assets held-for sale” |  |  | (1)
Balance, ending of period | 105 | 136 | 107
Available-for-sale | Asset-backed securities |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | 1 | 0 | 0
Additions to allowance for credit losses not previously recorded | 0 | 4 | 0
Reductions for securities sold during the period | 0 | 0 | 0
Reductions for securities with intent to sell | 0 | 0 |
Additions (reductions) on securities with previous allowance | 1 | (3) | 0
Write-offs charged against the allowance | 0 |  |
Reclassified to “Assets held-for sale” |  |  | 0
Balance, ending of period | 2 | 1 | 0
Available-for-sale | Commercial mortgage-backed securities |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | 0 | 0 | 10
Additions to allowance for credit losses not previously recorded | 0 | 0 | 0
Reductions for securities sold during the period | 0 | 0 | (9)
Reductions for securities with intent to sell | 0 | 0 |
Additions (reductions) on securities with previous allowance | 0 | 0 | (1)
Write-offs charged against the allowance | 0 |  |
Reclassified to “Assets held-for sale” |  |  | 0
Balance, ending of period | 0 | 0 | 0
Available-for-sale | Residential mortgage-backed securities |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | 0 | 0 | 0
Additions to allowance for credit losses not previously recorded | 0 | 0 | 0
Reductions for securities sold during the period | 0 | 0 | 0
Reductions for securities with intent to sell | 0 | 0 |
Additions (reductions) on securities with previous allowance | 0 | 0 | 0
Write-offs charged against the allowance | 0 |  |
Reclassified to “Assets held-for sale” |  |  | 0
Balance, ending of period | 0 | 0 | 0
Fixed maturities, held-to-maturity |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | 2 | 5 | 9
Current period provision for expected losses | (2) | (2) | (3)
Change in foreign exchange | 0 | (1) | (1)
Balance, ending of period | 0 | 2 | 5
Fixed maturities, held-to-maturity | U.S. Treasury securities and obligations of U.S. government authorities and agencies |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | 0 | 0 | 0
Current period provision for expected losses | 0 | 0 | 0
Change in foreign exchange | 0 | 0 | 0
Balance, ending of period | 0 | 0 | 0
Fixed maturities, held-to-maturity | Foreign government bonds |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | 0 | 0 | 0
Current period provision for expected losses | 0 | 0 | 0
Change in foreign exchange | 0 | 0 | 0
Balance, ending of period | 0 | 0 | 0
Fixed maturities, held-to-maturity | Corporate securities |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | 2 | 5 | 9
Current period provision for expected losses | (2) | (2) | (3)
Change in foreign exchange | 0 | (1) | (1)
Balance, ending of period | 0 | 2 | 5
Fixed maturities, held-to-maturity | Asset-backed securities |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | 0 | 0 | 0
Current period provision for expected losses | 0 | 0 | 0
Change in foreign exchange | 0 | 0 | 0
Balance, ending of period | 0 | 0 | 0
Fixed maturities, held-to-maturity | Commercial mortgage-backed securities |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | 0 | 0 | 0
Current period provision for expected losses | 0 | 0 | 0
Change in foreign exchange | 0 | 0 | 0
Balance, ending of period | 0 | 0 | 0
Fixed maturities, held-to-maturity | Residential mortgage-backed securities |  |  |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |  |  |
Balance, beginning of period | 0 | 0 | 0
Current period provision for expected losses | 0 | 0 | 0
Change in foreign exchange | 0 | 0 | 0
Balance, ending of period | $ 0 | $ 0 | $ 0

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