Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues [Abstract]
Earned premiums	$ 1,173	$ 1,111	$ 2,327	$ 2,205
Investment income, net of expenses	149	140	294	279
Realized investment gains, net	44	60	105	107
Fee revenues	3	3	6	6
Other revenues	2	2	3	4
Total revenues	1,371	1,316	2,735	2,601
Benefits and Expenses
Insurance losses and contract holders' benefits	821	712	1,545	1,461
Underwriting, acquisition and insurance expenses	366	340	726	685
Interest expense	13	13	26	26
Other operating expenses	5	3	7	7
Total benefits and expenses	1,205	1,068	2,304	2,179
Income Before Income Taxes	166	248	431	422
Provision (Benefit) for Income Taxes
Current	48	70	113	116
Deferred	(5)	2	7	2
Total provision for income taxes	43	72	120	118
Net Income	$ 123	$ 176	$ 311	$ 304
Per Common Share
Net income-basic (in USD per share)	$ 0.75	$ 1.07	$ 1.89	$ 1.85
Net income-diluted (in USD per share)	$ 0.74	$ 1.06	$ 1.87	$ 1.84