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Investments (ACL for Fixed Maturity Securities AFS by Sector) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | $ 91 | $ 81
ACL not previously recorded | 292 | 85
Changes for securities with previously recorded ACL | (29) | 2
Securities sold or exchanged | (139) | (62)
DebtSecuritiesAvailableforsaleAllowanceforCreditLossReversalRelatedtoBusinessDisposition | 0 | (2)
Debt Securities Available for sale Allowance for Credit Loss, Foreign Currency Translation | (10) | 0
Write-offs | (22) | (13)
Allowance, end of period | 183 | 91
U.S. corporate |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 30 | 44
ACL not previously recorded | 13 | 48
Changes for securities with previously recorded ACL | 17 | 3
Securities sold or exchanged | (9) | (52)
DebtSecuritiesAvailableforsaleAllowanceforCreditLossReversalRelatedtoBusinessDisposition | 0 | 0
Debt Securities Available for sale Allowance for Credit Loss, Foreign Currency Translation | 0 | 0
Write-offs | (22) | (13)
Allowance, end of period | 29 | 30
Foreign corporate |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 28 | 16
ACL not previously recorded | 67 | 26
Changes for securities with previously recorded ACL | 2 | (4)
Securities sold or exchanged | (93) | (10)
DebtSecuritiesAvailableforsaleAllowanceforCreditLossReversalRelatedtoBusinessDisposition | 0 | 0
Debt Securities Available for sale Allowance for Credit Loss, Foreign Currency Translation | 1 | 0
Write-offs | 0 | 0
Allowance, end of period | 5 | 28
Foreign government |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 19 | 21
ACL not previously recorded | 207 | 0
Changes for securities with previously recorded ACL | (48) | 0
Securities sold or exchanged | (37) | 0
DebtSecuritiesAvailableforsaleAllowanceforCreditLossReversalRelatedtoBusinessDisposition | 0 | (2)
Debt Securities Available for sale Allowance for Credit Loss, Foreign Currency Translation | (11) | 0
Write-offs | 0 | 0
Allowance, end of period | 130 | 19
CMBS |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 14 | 0
ACL not previously recorded | 5 | 11
Changes for securities with previously recorded ACL | 0 | 3
Securities sold or exchanged | 0 | 0
DebtSecuritiesAvailableforsaleAllowanceforCreditLossReversalRelatedtoBusinessDisposition | 0 | 0
Debt Securities Available for sale Allowance for Credit Loss, Foreign Currency Translation | 0 | 0
Write-offs | 0 | 0
Allowance, end of period | $ 19 | $ 14

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