Consolidated Statements Of Comprehensive Income (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
REVENUES
Earned premiums	$ 3,522		$ 3,194		$ 3,082
Investment income, net of expenses	531		525		518
Total realized investment gains (losses), net	42		70		159
Fee revenues	6		4		4
Other revenues	10		10		9
Total revenues	4,111	[1]	3,803	[1]	3,772
BENEFITS AND EXPENSES
Insurance losses and policyholder benefits	2,322		2,524		2,180
Underwriting, acquisition and insurance expenses	1,155		1,039		1,024
Interest expense	54		54		54
Other operating expenses	14		13		16
Total benefits and expenses	3,545		3,630		3,274
INCOME BEFORE INCOME TAXES	566		173		498
PROVISION (BENEFIT) FOR INCOME TAXES
Current	119		27		94
Deferred	26		(18)		29
Total provision for income taxes	145		9		123
NET INCOME	421		164		375
PER COMMON SHARE
Net income-basic	$ 2.59		$ 1.01		$ 2.30
Net income-diluted	$ 2.57		$ 1.01		$ 2.30
NET INCOME	421		164		375
OTHER COMPREHENSIVE INCOME, BEFORE TAX
Unrealized gains on investments available-for-sale	428		309		383
Reclassification adjustment for (gains) included in net income	(42)		(70)		(159)
Unrealized (losses) on other	(21)		(11)		(4)
Unrealized gains (losses) on investments available-for-sale and other	365		228		220
Amortization of pension actuarial (loss) gain and prior service costs	(13)		(25)		3
Other comprehensive income before tax	352		203		223
Income taxes on above	124		71		78
Other comprehensive income, net of tax	228		132		145
COMPREHENSIVE INCOME	$ 649		$ 296		$ 520

[1] Revenues including realized investment gains and losses, which are integral to our financial results over the long term, may cause this value to fluctuate substantially because we have substantial discretion in the timing of investment sales. Also, applicable accounting standards require us to recognize gains and losses from certain changes in fair values of securities and embedded derivatives without actual realization of those gains and losses. We discuss realized investment gains for the past three years in Item 7, Investments Results of Operations, Page .