Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues [Abstract]
Earned premiums	$ 1,127	$ 1,071	$ 3,332	$ 3,157
Investment income, net of expenses	143	138	422	409
Realized investment gains, net	3	65	110	101
Fee revenues	4	3	10	9
Other revenues	1	3	5	7
Total revenues	1,278	1,280	3,879	3,683
Benefits and Expenses
Insurance losses and contract holders' benefits	670	686	2,131	2,181
Underwriting, acquisition and insurance expenses	348	319	1,033	967
Interest expense	14	13	40	40
Other operating expenses	3	3	10	10
Total benefits and expenses	1,035	1,021	3,214	3,198
Income Before Income Taxes	243	259	665	485
Provision for Income Taxes
Current	64	68	180	106
Deferred	5	8	7	21
Total provision for income taxes	69	76	187	127
Net Income	$ 174	$ 183	$ 478	$ 358
Per Common Share
Net income-basic (in USD per share)	$ 1.06	$ 1.12	$ 2.91	$ 2.19
Net income-diluted (in USD per share)	$ 1.05	$ 1.11	$ 2.89	$ 2.17