Investments (ACL for Fixed Maturity Securities AFS By Sector) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	$ 355	$ 104	$ 91	$ 81
ACL not previously recorded	0	8	287	36
Changes for securities with previously recorded ACL	(13)	(1)	(6)	(6)
Securities sold or exchanged	(81)	(12)	(89)	(12)
Write-offs	0	0	(22)	0
Allowance, end of period	261	99	261	99
U.S. corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	13	43	30	44
ACL not previously recorded	0	0	13	0
Changes for securities with previously recorded ACL	15	4	15	3
Securities sold or exchanged	0	(8)	(8)	(8)
Write-offs	0	0	(22)	0
Allowance, end of period	28	39	28	39
Foreign corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	102	33	28	16
ACL not previously recorded	0	4	67	25
Changes for securities with previously recorded ACL	(5)	(1)	2	(5)
Securities sold or exchanged	(44)	(4)	(44)	(4)
Write-offs	0	0	0	0
Allowance, end of period	53	32	53	32
Foreign government
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	226	21	19	21
ACL not previously recorded	0	0	207	0
Changes for securities with previously recorded ACL	(23)	0	(23)	0
Securities sold or exchanged	(37)	0	(37)	0
Write-offs	0	0	0	0
Allowance, end of period	166	21	166	21
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance, beginning of period	14	7	14	0
ACL not previously recorded	0	4	0	11
Changes for securities with previously recorded ACL	0	(4)	0	(4)
Securities sold or exchanged	0	0	0	0
Write-offs	0	0	0	0
Allowance, end of period	$ 14	$ 7	$ 14	$ 7