Segment Information (Reconciliation of Operating Revenues to Total Revenues) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 2,901	$ 1,238	$ 5,490	$ 4,372
Annuities
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,037	995	3,052	2,957
Life
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	278	307	807	885
Run-off
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	484	536	1,487	1,594
Corporate & Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	40	41	110	108
Segment Reconciling Items
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 1,062	$ (641)	$ 34	$ (1,172)