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Segment Information (Tables)
3 Months Ended
Mar. 31, 2014
Segment Reporting [Abstract]  
Segment Information
Segment information is summarized in the following table: 
(In millions)
 
Three months ended March 31,
 
 
2014
 
2013
Revenues:
 
 

 
 

Commercial lines insurance
 
 

 
 

Commercial casualty
 
$
224

 
$
204

Commercial property
 
171

 
147

Commercial auto
 
126

 
114

Workers' compensation
 
92

 
88

Specialty packages
 
36

 
39

Management liability and surety
 
31

 
29

Machinery and equipment
 
12

 
10

Commercial lines insurance premiums
 
692

 
631

Fee revenue
 
1

 

Total commercial lines insurance
 
693

 
631

Personal lines insurance
 
 

 
 

Personal auto
 
116

 
107

Homeowner
 
109

 
96

Other personal lines
 
29

 
28

Personal lines insurance premiums
 
254

 
231

 
 
 
 
 
Excess and surplus lines insurance
 
33

 
27

 
 
 
 
 
Life insurance premiums
 
48

 
42

Separate account investment management fees
 
2

 
1

             Total life insurance
 
50

 
43

 
 
 
 
 
Investment operations
 
 
 
 
     Investment income, net of expenses
 
135

 
128

     Realized investment gains, net
 
22

 
41

             Total investment revenue
 
157

 
169

 
 
 
 
 
Other
 
2

 
2

Total revenues
 
$
1,189

 
$
1,103

Income (loss) before income taxes:
 
 

 
 

Insurance underwriting results
 
 

 
 

Commercial lines insurance
 
$
2

 
$
58

Personal lines insurance
 
(7
)
 
20

Excess and surplus lines insurance
 
4

 

Life insurance
 

 
7

Investment operations
 
136

 
148

Other
 
(16
)
 
(16
)
Total income before income taxes
 
$
119

 
$
217

Identifiable assets:
 
March 31,
2014
 
December 31, 2013
Property casualty insurance
 
$
2,493

 
$
2,455

Life insurance
 
1,302

 
1,225

Investment operations
 
13,730

 
13,618

Other
 
417

 
364

Total
 
$
17,942

 
$
17,662