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Segment Information (Tables)
3 Months Ended
Mar. 31, 2015
Segment Reporting [Abstract]  
Segment Information
Segment information is summarized in the following table: 
(Dollars in millions)
 
Three months ended March 31,
 
 
2015
 
2014
Revenues:
 
 

 
 

Commercial lines insurance
 
 

 
 

Commercial casualty
 
$
244

 
$
224

Commercial property
 
196

 
171

Commercial auto
 
136

 
126

Workers' compensation
 
93

 
92

Other commercial
 
64

 
79

Commercial lines insurance premiums
 
733

 
692

Fee revenues
 
1

 
1

Total commercial lines insurance
 
734

 
693

 
 
 
 
 
Personal lines insurance
 
 

 
 

Personal auto
 
123

 
116

Homeowner
 
114

 
109

Other personal
 
31

 
29

Personal lines insurance premiums
 
268

 
254

Fee revenues
 
1

 

      Total personal lines insurance
 
269

 
254

 
 
 
 
 
Excess and surplus lines insurance
 
40

 
33

 
 
 
 
 
Life insurance premiums
 
53

 
48

Separate account investment management fees
 
1

 
2

      Total life insurance
 
54

 
50

 
 
 
 
 
Investments
 
 
 
 
    Investment income, net of expenses
 
139

 
135

    Realized investment gains, net
 
47

 
22

        Total investment revenue
 
186

 
157

 
 
 
 
 
Other
 
2

 
2

Total revenues
 
$
1,285

 
$
1,189

 
 
 
 
 
Income (loss) before income taxes:
 
 

 
 

Insurance underwriting results
 
 

 
 

Commercial lines insurance
 
$
26

 
$
2

Personal lines insurance
 
(3
)
 
(7
)
Excess and surplus lines insurance
 
4

 
4

Life insurance
 
(3
)
 

Investments
 
165

 
136

Other
 
(15
)
 
(16
)
Total income before income taxes
 
$
174

 
$
119

Identifiable assets:
 
March 31,
2015
 
December 31, 2014
Property casualty insurance
 
$
2,711

 
$
2,656

Life insurance
 
1,306

 
1,316

Investments
 
14,544

 
14,441

Other
 
336

 
340

Total
 
$
18,897

 
$
18,753