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Investments (excluding Consolidated Investment Entities) - Net Realized Capital Gains (Losses) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jun. 01, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net realized capital gains (losses)		$ (103)	$ (70)	$ 1,602	$ (304)
Proceeds from sale of investments
Discontinued Operation, Equity Method Investment Retained after Disposal, Ownership Interest Prior to Disposal	9.99%
Equity Method Investment, Realized Gain (Loss) on Disposal				95
Proceeds on sales		369	341	10,582	1,706
Gross gains		22	7	1,733	97
Gross losses		1	4	3	73
Embedded derivatives - fixed maturities
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net realized capital gains (losses)		(1)	(3)	(6)	4
Guaranteed benefit derivatives
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net realized capital gains (losses)		1	35	49	(113)
Derivatives
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net realized capital gains (losses)		11	11	(5)	(22)
Mortgage loans on real estate
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net realized capital gains (losses)		14	17	177	(41)
Other investments
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net realized capital gains (losses)		2	1	100	0
Fixed maturities, available-for-sale, including securities pledged
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net realized capital gains (losses)		6	(7)	1,789	(59)
Fixed maturities, at fair value option
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net realized capital gains (losses)		(137)	(131)	(514)	(84)
Equity securities, at fair value
Available-for-sale Securities, Including Securities Pledged [Line Items]
Net realized capital gains (losses)		$ 1	$ 7	$ 12	$ 11