Investments (ACL for Fixed Maturity Securities AFS By Sector) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	$ 113	$ 193	$ 184	$ 183
ACL not previously recorded	14	0	14	36
Changes for securities with previously recorded ACL	10	4	10	(6)
Securities sold or exchanged	(16)	0	(87)	(16)
Allowance, end of period	121	197	121	197
U.S. corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	15	63	68	29
ACL not previously recorded	14	0	14	36
Changes for securities with previously recorded ACL	11	6	11	6
Securities sold or exchanged	(3)	0	(56)	(2)
Allowance, end of period	37	69	37	69
Foreign corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	2	2	2	5
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	(3)
Allowance, end of period	2	2	2	2
Foreign government
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	66	117	88	130
ACL not previously recorded	0	0	0	0
Changes for securities with previously recorded ACL	(1)	(2)	(5)	(15)
Securities sold or exchanged	(7)	0	(25)	0
Allowance, end of period	58	115	58	115
RMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	1	0	1	0
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	1	0	1	0
ABS & CLO
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	9	0	7	0
ACL not previously recorded	0	0	0	0
Changes for securities with previously recorded ACL	0	0	2	0
Securities sold or exchanged	0	0	0	0
Allowance, end of period	9	0	9	0
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	20	11	18	19
ACL not previously recorded	0	0	0	0
Changes for securities with previously recorded ACL	0	0	2	3
Securities sold or exchanged	(6)	0	(6)	(11)
Allowance, end of period	$ 14	$ 11	$ 14	$ 11

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
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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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

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