Investments (ACL for Fixed Maturity Securities AFS By Sector) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	$ 137	$ 113	$ 160	$ 184
ACL not previously recorded	16	14	24	14
Changes for securities with previously recorded ACL	2	10	12	10
Securities sold or exchanged	(4)	(16)	(45)	(87)
Allowance, end of period	151	121	151	121
U.S. corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	40	15	59	68
ACL not previously recorded	16	14	16	14
Changes for securities with previously recorded ACL	6	11	13	11
Securities sold or exchanged	0	(3)	(26)	(56)
Allowance, end of period	62	37	62	37
Foreign corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	6	2	18	2
ACL not previously recorded	0	0	0	0
Changes for securities with previously recorded ACL	(2)	0	(2)	0
Securities sold or exchanged	(4)	0	(16)	0
Allowance, end of period	0	2	0	2
Foreign government
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	57	66	57	88
ACL not previously recorded	0	0	0	0
Changes for securities with previously recorded ACL	0	(1)	0	(5)
Securities sold or exchanged	0	(7)	0	(25)
Allowance, end of period	57	58	57	58
RMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	2	1	1	1
ACL not previously recorded	0	0	1	0
Changes for securities with previously recorded ACL	0	0	0	0
Securities sold or exchanged	0	0	0	0
Allowance, end of period	2	1	2	1
ABS & CLO
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	7	9	9	7
ACL not previously recorded	0	0	0	0
Changes for securities with previously recorded ACL	(2)	0	(1)	2
Securities sold or exchanged	0	0	(3)	0
Allowance, end of period	5	9	5	9
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	25	20	16	18
ACL not previously recorded	0	0	7	0
Changes for securities with previously recorded ACL	0	0	2	2
Securities sold or exchanged	0	(6)	0	(6)
Allowance, end of period	$ 25	$ 14	$ 25	$ 14

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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