Segment Information (Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total assets	$ 235,288	$ 216,153
Annuities
Segment Reporting Information [Line Items]
Total assets	167,806	152,740
Life
Segment Reporting Information [Line Items]
Total assets	17,796	16,389
Run-off
Segment Reporting Information [Line Items]
Total assets	38,366	35,132
Corporate & Other
Segment Reporting Information [Line Items]
Total assets	$ 11,320	$ 11,892