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Investments (ACL for Fixed Maturity Securities AFS By Sector) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	$ 121	$ 197	$ 184	$ 183
ACL not previously recorded	40	10	54	46
Changes for securities with previously recorded ACL	4	(4)	14	(10)
Securities sold or exchanged	(3)	(21)	(90)	(37)
Allowance, end of period	162	182	162	182
U.S. corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	37	69	68	29
ACL not previously recorded	27	0	41	36
Changes for securities with previously recorded ACL	(1)	0	10	6
Securities sold or exchanged	(3)	(2)	(59)	(4)
Allowance, end of period	60	67	60	67
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	13	0	13	0
Changes for securities with previously recorded ACL	0	0	0	0
Securities sold or exchanged	0	0	0	(3)
Allowance, end of period	15	2	15	2
Foreign government
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	58	115	88	130
ACL not previously recorded	0	0	0	0
Changes for securities with previously recorded ACL	4	(7)	(1)	(22)
Securities sold or exchanged	0	(19)	(25)	(19)
Allowance, end of period	62	89	62	89
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	1	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	1	1	1
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	7	0	7
Changes for securities with previously recorded ACL	1	0	3	0
Securities sold or exchanged	0	0	0	0
Allowance, end of period	10	7	10	7
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	14	11	18	19
ACL not previously recorded	0	2	0	2
Changes for securities with previously recorded ACL	0	3	2	6
Securities sold or exchanged	0	0	(6)	(11)
Allowance, end of period	$ 14	$ 16	$ 14	$ 16

X

- Definition

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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aaa)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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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-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Section 50
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+ References

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