Segment Information (Reconciliation of Operating Revenues to Total Revenues) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total revenues	$ 8,122	$ 5,798	$ 2,260
Annuities
Segment Reporting Information [Line Items]
Total revenues	3,921	3,721	4,423
Life
Segment Reporting Information [Line Items]
Total revenues	1,160	1,036	1,036
Run-off
Segment Reporting Information [Line Items]
Total revenues	2,112	2,148	2,313
Corporate & Other
Segment Reporting Information [Line Items]
Total revenues	147	250	338
Segment Reconciling Items
Segment Reporting Information [Line Items]
Total revenues	$ 782	$ (1,357)	$ (5,850)