Investments (ACL for Fixed Maturity Securities AFS By Sector) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	$ 249	$ 160
ACL not previously recorded	56	8
Changes for securities with previously recorded ACL	25	10
Securities sold or exchanged	(57)	(41)
Allowance, end of period	273	137
U.S. corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	138	59
ACL not previously recorded	0	0
Changes for securities with previously recorded ACL	22	7
Securities sold or exchanged	(26)	(26)
Allowance, end of period	134	40
Foreign corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	7	18
ACL not previously recorded	52	0
Changes for securities with previously recorded ACL	0	0
Securities sold or exchanged	(7)	(12)
Allowance, end of period	52	6
Foreign government
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	57	57
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	57	57
RMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	1	1
ACL not previously recorded	0	1
Changes for securities with previously recorded ACL	0	0
Securities sold or exchanged	0	0
Allowance, end of period	1	2
ABS & CLO
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	6	9
ACL not previously recorded	0	0
Changes for securities with previously recorded ACL	(1)	1
Securities sold or exchanged	0	(3)
Allowance, end of period	5	7
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	40	16
ACL not previously recorded	4	7
Changes for securities with previously recorded ACL	4	2
Securities sold or exchanged	(24)	0
Allowance, end of period	$ 24	$ 25

Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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