Segment Information (Reconciliation of Operating Revenues to Total Revenues) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Total revenues	$ 8,600	$ 477
Annuities
Segment Reporting Information [Line Items]
Total revenues	1,013	967
Life
Segment Reporting Information [Line Items]
Total revenues	269	254
Run-off
Segment Reporting Information [Line Items]
Total revenues	493	476
Corporate & Other
Segment Reporting Information [Line Items]
Total revenues	38	37
Segment Reconciling Items
Segment Reporting Information [Line Items]
Total revenues	$ 6,787	$ (1,257)