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Income From Investments (Tables)
12 Months Ended
Dec. 31, 2017
Investment Income, Net [Abstract]  
Investment Income
Net Investment Income for the years ended December 31, 2017, 2016 and 2015 was:
DOLLARS IN MILLIONS
 
2017
 
2016
 
2015
Investment Income (Loss):
 
 
 
 
 
 
Interest and Dividends on Fixed Maturities
 
$
246.6

 
$
242.7

 
$
236.2

Dividends on Equity Securities Excluding Alternative Investments
 
9.3

 
11.8

 
14.8

Alternative Investments:
 
 
 
 
 
 
Equity Method Limited Liability Investments
 
24.8

 
7.5

 
19.0

Fair Value Option Investments
 
1.3

 
(1.9
)
 
0.2

Limited Liability Investments Included in Equity Securities
 
28.6

 
22.0

 
17.6

Total Alternative Investments
 
54.7

 
27.6

 
36.8

Short-term Investments
 
1.6

 
0.5

 
0.4

Loans to Policyholders
 
21.6

 
21.6

 
21.1

Real Estate
 
10.7

 
11.8

 
11.9

Other
 
0.5

 
0.3

 

Total Investment Income
 
345.0

 
316.3

 
321.2

Investment Expenses:
 
 
 
 
 
 
Real Estate
 
10.5

 
11.0

 
11.3

Other Investment Expenses
 
7.3

 
7.0

 
7.3

Total Investment Expenses
 
17.8

 
18.0

 
18.6

Net Investment Income
 
$
327.2

 
$
298.3

 
$
302.6

Realized Gain (Loss) on Investments
The components of Net Realized Gains on Sales of Investments for the years ended December 31, 2017, 2016 and 2015 were:
DOLLARS IN MILLIONS
 
2017
 
2016
 
2015
Fixed Maturities:
 
 
 
 
 
 
Gains on Sales
 
$
8.4

 
$
17.0

 
$
16.1

Losses on Sales
 
(0.9
)
 
(4.6
)
 
(1.1
)
Equity Securities:
 
 
 
 
 
 
Gains on Sales
 
42.0

 
19.9

 
39.2

Losses on Sales
 

 
(0.3
)
 
(1.6
)
Real Estate:
 
 
 
 
 
 
Gains on Sales
 
6.4

 
1.1

 

Losses on Sales
 

 

 
(0.2
)
Other Investments:
 
 
 
 
 
 
Gains on Other Sales
 
0.1

 

 

Losses on Sales
 
(0.1
)
 
(0.2
)
 

Net Gains (Losses) on Trading Securities
 
0.6

 
0.2

 
(0.3
)
Net Realized Gains on Sales of Investments
 
$
56.5

 
$
33.1

 
$
52.1

 
 
 
 
 
 
 
Gross Gains on Sales
 
$
56.9

 
$
38.0

 
$
55.3

Gross Losses on Sales
 
(1.0
)
 
(5.1
)
 
(2.9
)
Net Gains (Losses) on Trading Securities
 
0.6

 
0.2

 
(0.3
)
Net Realized Gains on Sales of Investments
 
$
56.5

 
$
33.1

 
$
52.1

Other than Temporary Impairment, Credit Losses Recognized in Earnings
The components of Net Impairment Losses Recognized in Earnings reported in the Consolidated Statements of Income for the years ended December 31, 2017, 2016 and 2015 were:
DOLLARS IN MILLIONS
 
2017
 
2016
 
2015
Fixed Maturities
 
$
(12.1
)
 
$
(26.6
)
 
$
(11.5
)
Equity Securities
 
(2.2
)
 
(5.6
)
 
(15.7
)
Real Estate
 

 
(0.5
)
 

Net Impairment Losses Recognized in Earnings
 
$
(14.3
)
 
$
(32.7
)
 
$
(27.2
)