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Investments (ACL for Fixed Maturity Securities AFS By Sector) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | $ 184 | $ 183
ACL not previously recorded | 0 | 36
Changes for securities with previously recorded ACL | 0 | (10)
Securities sold or exchanged | (71) | (16)
Allowance, end of period | 113 | 193
U.S. corporate |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 68 | 29
ACL not previously recorded | 0 | 36
Changes for securities with previously recorded ACL | 0 | 0
Securities sold or exchanged | (53) | (2)
Allowance, end of period | 15 | 63
Foreign corporate |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 2 | 5
ACL not previously recorded | 0 | 0
Changes for securities with previously recorded ACL | 0 | 0
Securities sold or exchanged | 0 | (3)
Allowance, end of period | 2 | 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 | (4) | (13)
Securities sold or exchanged | (18) | 0
Allowance, end of period | 66 | 117
RMBS |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 1 | 0
ACL not previously recorded | 0 | 0
Changes for securities with previously recorded ACL | 0 | 0
Securities sold or exchanged | 0 | 0
Allowance, end of period | 1 | 0
ABS & CLO |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 7 | 0
ACL not previously recorded | 0 | 0
Changes for securities with previously recorded ACL | 2 | 0
Securities sold or exchanged | 0 | 0
Allowance, end of period | 9 | 0
CMBS |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items] |  |
Allowance, beginning of period | 18 | 19
ACL not previously recorded | 0 | 0
Changes for securities with previously recorded ACL | 2 | 3
Securities sold or exchanged | 0 | (11)
Allowance, end of period | $ 20 | $ 11

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