Segment Information (Reconciliation of Operating Revenues to Total Revenues) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 477	$ 1,624
Annuities
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	967	977
Life
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	254	300
Run-off
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	476	549
Corporate & Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	37	36
Segment Reconciling Items
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ (1,257)	$ (238)