Segment Information (Tables)

12 Months Ended

Dec. 31, 2012

Segment Information [Abstract]

Segment Information

(In millions)		Years ended December 31,
		2012		2011		2010
Revenues:
Commercial lines insurance
Commercial casualty	$	767	$	711	$	693
Commercial property		545		497		489
Commercial auto		426		394		384
Workers' compensation		344		318		311
Specialty packages		151		138		149
Surety and executive risk		111		103		95
Machinery and equipment		39		36		33
Commercial lines insurance premiums		2,383		2,197		2,154
Fee revenue		4		3		2
Total commercial lines insurance		2,387		2,200		2,156
Personal lines insurance
Personal auto		404		368		337
Homeowner		353		294		289
Other personal lines		111		100		95
Personal lines insurance premiums		868		762		721
Fee revenue		2		1		2
Total personal lines insurance		870		763		723
Excess and surplus lines insurance		93		70		49
Life insurance premiums		178		165		158
Separate account investment management fees		1		2		1
Total life insurance		179		167		159
Investment operations
Investment income, net of expenses		531		525		518
Realized investment gains, net		42		70		159
Total Investment revenue		573		595		677
Other		9		8		8
Total Revenues	$	4,111	$	3,803	$	3,772
Income (loss) before income taxes:
Insurance underwriting results:
Commercial lines insurance	$	181	$	(102)	$	14
Personal lines insurance		(43)		(182)		(55)
Excess and surplus lines insurance		(1)		6		(8)
Life insurance		(3)		(3)		6
Investment operations		491		514		598
Other		(59)		(60)		(57)
Total income before income taxes	$	566	$	173	$	498
Identifiable assets:		December 31,		December 31,
		2012		2011
Property casualty insurance	$	2,395	$	2,272
Life insurance		1,201		1,237
Investment operations		12,599		11,883
Other		353		243
Total	$	16,548	$	15,635