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Investments (ACL for Fixed Maturity Securities AFS by Sector) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | $ 184 | $ 183
ACL not previously recorded | 60 | 47
Changes for securities with previously recorded ACL | 9 | (9)
Securities sold or exchanged | (93) | (37)
Allowance, end of period | 160 | 184
U.S. corporate |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 68 | 29
ACL not previously recorded | 41 | 36
Changes for securities with previously recorded ACL | 9 | 7
Securities sold or exchanged | (59) | (4)
Allowance, end of period | 59 | 68
Foreign corporate |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 2 | 5
ACL not previously recorded | 19 | 0
Changes for securities with previously recorded ACL | 0 | 0
Securities sold or exchanged | (3) | (3)
Allowance, end of period | 18 | 2
Foreign government |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 88 | 130
ACL not previously recorded | 0 | 0
Changes for securities with previously recorded ACL | (6) | (23)
Securities sold or exchanged | (25) | (19)
Allowance, end of period | 57 | 88
RMBS |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 1 | 0
ACL not previously recorded | 0 | 2
Changes for securities with previously recorded ACL | 0 | (1)
Securities sold or exchanged | 0 | 0
Allowance, end of period | 1 | 1
ABS & CLO |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 7 | 0
ACL not previously recorded | 0 | 7
Changes for securities with previously recorded ACL | 2 | 0
Securities sold or exchanged | 0 | 0
Allowance, end of period | 9 | 7
CMBS |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 18 | 19
ACL not previously recorded | 0 | 2
Changes for securities with previously recorded ACL | 4 | 8
Securities sold or exchanged | (6) | (11)
Allowance, end of period | $ 16 | $ 18

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