Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues [Abstract]
Earned premiums	$ 1,154	$ 1,094
Investment income, net of expenses	145	139
Realized investment gains, net	61	47
Fee revenues	3	3
Other revenues	1	2
Total revenues	1,364	1,285
Benefits and Expenses
Insurance losses and contract holders' benefits	724	749
Underwriting, acquisition and insurance expenses	360	345
Interest expense	13	13
Other operating expenses	2	4
Total benefits and expenses	1,099	1,111
Income Before Income Taxes	265	174
Provision for Income Taxes
Current	65	46
Deferred	12	0
Total provision for income taxes	77	46
Net Income	$ 188	$ 128
Per Common Share
Net income-basic (in USD per share)	$ 1.14	$ 0.78
Net income-diluted (in USD per share)	$ 1.13	$ 0.77