Segment Information (Total Assets) (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total assets	$ 224,301	$ 216,153
Annuities
Segment Reporting Information [Line Items]
Total assets	154,215	152,740
Life
Segment Reporting Information [Line Items]
Total assets	16,943	16,389
Run-off
Segment Reporting Information [Line Items]
Total assets	38,052	35,132
Corporate & Other
Segment Reporting Information [Line Items]
Total assets	$ 15,091	$ 11,892