Investments (ACL for Fixed Maturity Securities AFS By Sector) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	$ 160	$ 184
ACL not previously recorded	8	0
Changes for securities with previously recorded ACL	10	0
Securities sold or exchanged	(41)	(71)
Allowance, end of period	137	113
U.S. corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	59	68
ACL not previously recorded	0	0
Changes for securities with previously recorded ACL	7	0
Securities sold or exchanged	(26)	(53)
Allowance, end of period	40	15
Foreign corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	18	2
ACL not previously recorded	0	0
Changes for securities with previously recorded ACL	0	0
Securities sold or exchanged	(12)	0
Allowance, end of period	6	2
Foreign government
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	57	88
ACL not previously recorded	0	0
Changes for securities with previously recorded ACL	0	(4)
Securities sold or exchanged	0	(18)
Allowance, end of period	57	66
RMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	1	1
ACL not previously recorded	1	0
Changes for securities with previously recorded ACL	0	0
Securities sold or exchanged	0	0
Allowance, end of period	2	1
ABS & CLO
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	9	7
ACL not previously recorded	0	0
Changes for securities with previously recorded ACL	1	2
Securities sold or exchanged	(3)	0
Allowance, end of period	7	9
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	16	18
ACL not previously recorded	7	0
Changes for securities with previously recorded ACL	2	2
Securities sold or exchanged	0	0
Allowance, end of period	$ 25	$ 20

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
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Section 50
-Paragraph 9
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-9

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Name Accounting Standards Codification
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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