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	$ 194	$ 112
ACL not previously recorded	19	4
Changes for securities with previously recorded ACL	25	6
Securities sold or exchanged	(43)	(36)
Allowance, end of period	195	86
U.S. corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	125	45
ACL not previously recorded	0	0
Changes for securities with previously recorded ACL	21	4
Securities sold or exchanged	(25)	(23)
Allowance, end of period	121	26
Foreign corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	7	15
ACL not previously recorded	16	0
Changes for securities with previously recorded ACL	0	0
Securities sold or exchanged	(7)	(10)
Allowance, end of period	16	5
Foreign government
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	36	36
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	36	36
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	5	7
ACL not previously recorded	0	0
Changes for securities with previously recorded ACL	0	1
Securities sold or exchanged	0	(3)
Allowance, end of period	5	5
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	20	8
ACL not previously recorded	3	3
Changes for securities with previously recorded ACL	4	1
Securities sold or exchanged	(11)	0
Allowance, end of period	$ 16	$ 12

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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