Investments (ACL for Fixed Maturity Securities AFS By Sector) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	$ 193	$ 355	$ 183	$ 91
ACL not previously recorded	0	0	36	287
Changes for securities with previously recorded ACL	4	(13)	(6)	(6)
Securities sold or exchanged	0	(81)	(16)	(89)
Write-offs	0	0	0	(22)
Allowance, end of period	197	261	197	261
U.S. corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	63	13	29	30
ACL not previously recorded	0	0	36	13
Changes for securities with previously recorded ACL	6	15	6	15
Securities sold or exchanged	0	0	(2)	(8)
Write-offs	0	0	0	(22)
Allowance, end of period	69	28	69	28
Foreign corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	2	102	5	28
ACL not previously recorded	0	0	0	67
Changes for securities with previously recorded ACL	0	(5)	0	2
Securities sold or exchanged	0	(44)	(3)	(44)
Write-offs	0	0	0	0
Allowance, end of period	2	53	2	53
Foreign government
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	117	226	130	19
ACL not previously recorded	0	0	0	207
Changes for securities with previously recorded ACL	(2)	(23)	(15)	(23)
Securities sold or exchanged	0	(37)	0	(37)
Write-offs	0	0	0	0
Allowance, end of period	115	166	115	166
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	11	14	19	14
ACL not previously recorded	0	0	0	0
Changes for securities with previously recorded ACL	0	0	3	0
Securities sold or exchanged	0	0	(11)	0
Write-offs	0	0	0	0
Allowance, end of period	$ 11	$ 14	$ 11	$ 14