Segment Information (Reconciliation of Operating Revenues to Total Revenues) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 2,112	$ 1,510	$ 2,589	$ 3,134
Annuities
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,048	985	2,015	1,962
Life
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	275	278	529	578
Run-off
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	527	509	1,003	1,058
Corporate & Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	33	31	70	67
Segment Reconciling Items
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 229	$ (293)	$ (1,028)	$ (531)