Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues [Abstract]
Earned premiums	$ 1,208	$ 1,154
Investment income, net of expenses	149	145
Realized investment gains, net	160	61
Fee revenues	5	3
Other revenues	1	1
Total revenues	1,523	1,364
Benefits and Expenses
Insurance losses and contract holders' benefits	853	724
Underwriting, acquisition and insurance expenses	377	360
Interest expense	13	13
Other operating expenses	4	2
Total benefits and expenses	1,247	1,099
Income Before Income Taxes	276	265
Provision for Income Taxes
Current	40	65
Deferred	35	12
Total provision for income taxes	75	77
Net Income	$ 201	$ 188
Per Common Share
Net income-basic (in USD per share)	$ 1.22	$ 1.14
Net income-diluted (in USD per share)	$ 1.21	$ 1.13