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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, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	$ 151	$ 121	$ 160	$ 184
ACL not previously recorded	66	40	90	54
Changes for securities with previously recorded ACL	31	4	43	14
Securities sold or exchanged	0	(3)	(45)	(90)
Allowance, end of period	248	162	248	162
U.S. corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	62	37	59	68
ACL not previously recorded	66	27	82	41
Changes for securities with previously recorded ACL	25	(1)	38	10
Securities sold or exchanged	0	(3)	(26)	(59)
Allowance, end of period	153	60	153	60
Foreign corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	0	2	18	2
ACL not previously recorded	0	13	0	13
Changes for securities with previously recorded ACL	0	0	(2)	0
Securities sold or exchanged	0	0	(16)	0
Allowance, end of period	0	15	0	15
Foreign government
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	57	58	57	88
ACL not previously recorded	0	0	0	0
Changes for securities with previously recorded ACL	0	4	0	(1)
Securities sold or exchanged	0	0	0	(25)
Allowance, end of period	57	62	57	62
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	5	9	9	7
ACL not previously recorded	0	0	0	0
Changes for securities with previously recorded ACL	1	1	0	3
Securities sold or exchanged	0	0	(3)	0
Allowance, end of period	6	10	6	10
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	25	14	16	18
ACL not previously recorded	0	0	7	0
Changes for securities with previously recorded ACL	5	0	7	2
Securities sold or exchanged	0	0	0	(6)
Allowance, end of period	$ 30	$ 14	$ 30	$ 14

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- 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
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Amount of expense 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), for which no credit loss was previously recorded.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
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-Section 50
-Paragraph 9
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-Publisher FASB
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Reference 2: 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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-Section 50
-Paragraph 9
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