Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of the deferred income tax assets and liabilities
Unrecognized tax benefits	$ 1	$ 0	$ 0
Tax penalties or interest accrued	0
Deferred assets
Difference in tax bases of investments	46	31
Deferred reinsurance gain	17	20
Other assets	9	15
Total deferred assets	72	66
Deferred liabilities
Unrealized net capital gains	(287)	(747)
DAC	(387)	(396)
Unrealized net capital gains	(309)	(255)
Other liabilities	(75)	(75)
Total deferred liabilities	(1,058)	(1,473)
Net deferred liability	(986)	(1,407)
Components of income tax expense
Current	251	101	71
Deferred	50	132	(52)
Total income tax expense	301	233	19
Income tax refunds received			$ 11
Income taxes paid	221	80
Current income tax payable		$ 7
Current income tax receivable	$ 30
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation
Statutory federal income tax rate - expense (benefit)	35.00%	35.00%	(35.00%)
Tax credits (as a percent)	(1.70%)	(1.90%)	(181.80%)
Dividends received deduction (as a percent)	(0.60%)	(0.90%)	(46.10%)
Adjustments to prior year tax liabilities (as a percent)	(0.30%)	(0.20%)	(14.10%)
Sale of subsidiary (as a percent)	0.00%	(1.80%)	351.30%
State income taxes (as a percent)	0.40%	0.10%	15.30%
Non-deductible expenses (as a percent)	0.20%	0.20%	6.80%
Change in accounting for investments in qualified affordable housing projects (as a percent)	2.00%	0.00%	0.00%
Other (as a percent)	(0.10%)	0.20%	0.10%
Effective income tax rate - expense (as a percent)	34.90%	30.70%	96.50%