Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
REVENUES
Earned premiums	$ 3,902	$ 3,522	$ 3,194
Investment income, net of expenses	529	531	525
Total realized investment gains (losses), net	83	42	70
Fee revenues	8	6	4
Other revenues	9	10	10
Total revenues	4,531	4,111	3,803
BENEFITS AND EXPENSES
Insurance losses and policyholder benefits	2,505	2,322	2,524
Underwriting, acquisition and insurance expenses	1,243	1,155	1,039
Interest expense	54	54	54
Other operating expenses	15	14	13
Total benefits and expenses	3,817	3,545	3,630
Income (loss) before income taxes	714	566	173
PROVISION (BENEFIT) FOR INCOME TAXES
Current	178	119	27
Deferred	19	26	(18)
Total provision for income taxes	197	145	9
NET INCOME	517	421	164
PER COMMON SHARE
Net income-basic	$ 3.16	$ 2.59	$ 1.01
Net income-diluted	$ 3.12	$ 2.57	$ 1.01
NET INCOME	$ 517	$ 421	$ 164