Schedule IV - Reinsurance Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Life insurance in force, gross	$ 8,974	$ 9,869	$ 10,873
Life insurance in force, ceded	9,202	10,116	11,140
Life insurance in force, assumed	228	247	267
Life insurance in force, net	0	0	0
Total premiums, gross	41	48	870
Total premiums, ceded	0	0	0
Total premiums, assumed	0	0	0
Total premiums, net	$ 41	$ 48	$ 870
SEC Schedule, 12-17, Insurance Companies, Reinsurance, Premium, Percentage Assumed to Net	0.00%	0.00%	0.00%
Accident and health insurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Total premiums, gross	$ 0	$ 0	$ 0
Total premiums, ceded	0	0	0
Total premiums, assumed	0	0	0
Total premiums, net	$ 0	$ 0	$ 0
SEC Schedule, 12-17, Insurance Companies, Reinsurance, Premium, Percentage Assumed to Net	0.00%	0.00%	0.00%
Annuities
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Total premiums, gross	$ 41	$ 48	$ 870
Total premiums, ceded	0	0	0
Total premiums, assumed	0	0	0
Total premiums, net	$ 41	$ 48	$ 870
SEC Schedule, 12-17, Insurance Companies, Reinsurance, Premium, Percentage Assumed to Net	0.00%	0.00%	0.00%