Investments (ACL for Fixed Maturity Securities AFS By Sector) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	$ 195	$ 86	$ 194	$ 112
ACL not previously recorded	0	16	19	20
Changes for securities with previously recorded ACL	(4)	4	21	10
Securities sold or exchanged	(33)	(3)	(76)	(39)
Allowance, end of period	158	103	158	103
U.S. corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	121	26	125	45
ACL not previously recorded	0	16	0	16
Changes for securities with previously recorded ACL	0	7	21	11
Securities sold or exchanged	(28)	0	(53)	(23)
Allowance, end of period	93	49	93	49
Foreign corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	16	5	7	15
ACL not previously recorded	0	0	16	0
Changes for securities with previously recorded ACL	(4)	(2)	(4)	(2)
Securities sold or exchanged	0	(3)	(7)	(13)
Allowance, end of period	12	0	12	0
Foreign government
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	36	36	36	36
ACL not previously recorded	0	0	0	0
Changes for securities with previously recorded ACL	0	0	0	0
Securities sold or exchanged	0	0	0	0
Allowance, end of period	36	36	36	36
RMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	1	2	1	1
ACL not previously recorded	0	0	0	1
Changes for securities with previously recorded ACL	0	0	0	0
Securities sold or exchanged	0	0	0	0
Allowance, end of period	1	2	1	2
ABS & CLO
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	5	5	5	7
ACL not previously recorded	0	0	0	0
Changes for securities with previously recorded ACL	0	(1)	0	0
Securities sold or exchanged	(5)	0	(5)	(3)
Allowance, end of period	0	4	0	4
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	16	12	20	8
ACL not previously recorded	0	0	3	3
Changes for securities with previously recorded ACL	0	0	4	1
Securities sold or exchanged	0	0	(11)	0
Allowance, end of period	$ 16	$ 12	$ 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).

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