Segment Information (Reconciliation of Operating Revenues to Total Revenues) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total revenues	$ 7,552	$ 5,627	$ 8,122
Annuities
Segment Reporting Information [Line Items]
Total revenues	4,005	4,062	3,921
Life
Segment Reporting Information [Line Items]
Total revenues	1,081	1,115	1,160
Run-off
Segment Reporting Information [Line Items]
Total revenues	1,937	2,009	2,112
Corporate & Other
Segment Reporting Information [Line Items]
Total revenues	148	145	147
Segment Reconciling Items
Segment Reporting Information [Line Items]
Total revenues	$ 381	$ (1,704)	$ 782