Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes [Abstract]

Components Of Deferred Tax Assets And Liabilities

(In millions)		At December 31,
		2012		2011
Deferred tax assets:
Loss and loss expense reserves	$	202	$	201
Unearned premiums		124		113
Investments		31		36
Other		39		46
Total		396		396
Deferred tax liabilities:
Unrealized investment gains and other		605		481
Deferred acquisition costs		163		156
Life policy reserves		65		42
Other		16		20
Total		849		699
Net deferred tax liability	$	453	$	303

Differences Between The 35 Percent Statutory Income Tax Rate And Effective Income Tax Rate

(Dollars in millions)	Years ended December 31,
		2012				2011				2010
Tax at statutory rate	$	198	35.0	%	$	61	35.0	%	$	174	35.0	%
Increase (decrease) resulting from:
Tax-exempt income from municipal bonds		(33)	(5.9)			(35)	(20.0)			(36)	(7.2)
Dividend received exclusion		(24)	(4.2)			(20)	(11.7)			(19)	(3.8)
Other		4	0.7			3	1.9			4	0.7
Effective tax	$	145	25.6	%	$	9	5.2	%	$	123	24.7	%