Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Components of the deferred income tax assets and liabilities
Unrecognized tax benefits	$ 1,000,000	$ 1,000,000	$ 0
Unrecognized tax benefits, interest on income taxes accrued	0	0
Tax penalties or interest accrued	0	0
Deferred assets
Deferred reinsurance gain	16,000,000	17,000,000
Difference in tax bases of investments	0	46,000,000
Other assets	4,000,000	9,000,000
Total deferred assets	20,000,000	72,000,000
Deferred liabilities
DAC	(370,000,000)	(387,000,000)
Unrealized net capital gains	(369,000,000)	(287,000,000)
Life and annuity reserves	(362,000,000)	(309,000,000)
Difference in tax bases of investments	(35,000,000)	0
Other liabilities	(75,000,000)	(75,000,000)
Total deferred liabilities	(1,211,000,000)	(1,058,000,000)
Net deferred liability	(1,191,000,000)	(986,000,000)
Components of income tax expense
Current	24,000,000	251,000,000	101,000,000
Deferred	120,000,000	50,000,000	132,000,000
Total income tax expense	144,000,000	301,000,000	233,000,000
Income taxes paid		221,000,000	$ 80,000,000
Income tax refunds received	22,000,000
Current income tax receivable	$ 16,000,000	$ 30,000,000
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation
Statutory federal income tax rate	35.00%	35.00%	35.00%
Tax credits	(3.30%)	(1.70%)	(1.90%)
Dividends received deduction	(1.30%)	(0.60%)	(0.90%)
Adjustments to prior year tax liabilities	(0.00%)	(0.30%)	(0.20%)
Sale of subsidiary	0.00%	0.00%	(1.80%)
State income taxes	0.30%	0.40%	0.10%
Non-deductible expenses	0.20%	0.20%	0.20%
Change in accounting for investments in qualified affordable housing projects	0.00%	2.00%	0.00%
Other	0.10%	(0.10%)	0.20%
Effective income tax rate	31.00%	34.90%	30.70%