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Accumulated Other Comprehensive Income
 12 Months Ended
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss)
Components of our accumulated other comprehensive income (loss), after tax, and related changes are as follows:
 
 
 
Net Unrealized Gain on Securities
 
Net Gain on Cash Flow Hedges
 
Foreign Currency Translation Adjustment
 
Unrecognized Pension and Postretirement Benefit Costs
 
Total
 
 
 
(in millions of dollars)
Balance at December 31, 2014
 
$
290.3

 
$
391.0

 
$
(113.4
)
 
$
(401.5
)
 
$
166.4

 
Other Comprehensive Income (Loss) Before Reclassifications
 
(114.7
)
 
43.3

 
(60.2
)
 
1.3

 
(130.3
)
 
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss
 
28.7

 
(56.3
)
 
—

 
7.6

 
(20.0
)
 
Net Other Comprehensive Income (Loss)
 
(86.0
)
 
(13.0
)
 
(60.2
)
 
8.9

 
(150.3
)
Balance at December 31, 2015
 
204.3

 
378.0

 
(173.6
)
 
(392.6
)
 
16.1

 
Other Comprehensive Income (Loss) Before Reclassifications
 
226.5

 
(15.8
)
 
(180.4
)
 
(82.8
)
 
(52.5
)
 
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss
 
9.8

 
(34.7
)
 
—

 
10.3

 
(14.6
)
 
Net Other Comprehensive Income (Loss)
 
236.3

 
(50.5
)
 
(180.4
)
 
(72.5
)
 
(67.1
)
Balance at December 31, 2016
 
440.6

 
327.5

 
(354.0
)
 
(465.1
)
 
(51.0
)
 
Other Comprehensive Income (Loss) Before Reclassifications
 
176.7

 
(14.7
)
 
99.5

 
(55.9
)
 
205.6

 
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss
 
(9.5
)
 
(30.5
)
 
—

 
12.9

 
(27.1
)
 
Net Other Comprehensive Income (Loss)
 
167.2

 
(45.2
)
 
99.5

 
(43.0
)
 
178.5

Balance at December 31, 2017
 
$
607.8

 
$
282.3

 
$
(254.5
)
 
$
(508.1
)
 
$
127.5



The net unrealized gain on securities consists of the following components:
 
 
December 31
 
Change for the Year Ended December 31
 
 
2017
 
2016
 
2015
 
2014
 
2017
 
2016
 
2015
 
 
(in millions of dollars)
Fixed Maturity Securities
 
$
5,677.3

 
$
4,664.6

 
$
3,695.7

 
$
6,261.5

 
$
1,012.7

 
$
968.9

 
$
(2,565.8
)
Other Investments
 
14.4

 
(22.7
)
 
(33.7
)
 
13.9

 
37.1

 
11.0

 
(47.6
)
Deferred Acquisition Costs
 
(51.4
)
 
(38.9
)
 
(29.4
)
 
(50.8
)
 
(12.5
)
 
(9.5
)
 
21.4

Reserves for Future Policy and Contract Benefits
 
(5,094.7
)
 
(4,253.2
)
 
(3,578.4
)
 
(6,150.3
)
 
(841.5
)
 
(674.8
)
 
2,571.9

Reinsurance Recoverable
 
375.8

 
321.3

 
263.2

 
365.0

 
54.5

 
58.1

 
(101.8
)
Income Tax
 
(313.6
)
 
(230.5
)
 
(113.1
)
 
(149.0
)
 
(83.1
)
 
(117.4
)
 
35.9

Total
 
$
607.8

 
$
440.6

 
$
204.3

 
$
290.3

 
$
167.2

 
$
236.3

 
$
(86.0
)

Amounts reclassified from accumulated other comprehensive income (loss) were recognized in our consolidated statements of income as follows:
 
 
 
 
Year Ended December 31
 
 
 
 
2017
 
2016
 
2015
 
 
 
 
(in millions of dollars)
Net Unrealized Gain on Securities
 
 
 
 
 
 
 
Net Realized Investment Gain (Loss)
 
 
 
 
 
 
 
 
Gain (Loss) on Sales of Securities and Other Invested Assets
 
$
22.7

 
$
15.3

 
$
(12.2
)
 
 
Other-Than-Temporary Impairment Loss
 
(8.1
)
 
(30.5
)
 
(32.4
)
 
 
 
 
14.6


(15.2
)
 
(44.6
)
 
Income Tax Expense (Benefit)
 
5.1

 
(5.4
)
 
(15.9
)
 
Total
 
$
9.5


$
(9.8
)
 
$
(28.7
)
 
 
 
 
 
 
 
 
 
Net Gain on Cash Flow Hedges
 
 
 
 
 
 
 
Net Investment Income
 
 
 
 
 
 
 
 
Gain on Interest Rate Swaps and Forwards
 
$
59.0

 
$
54.5

 
$
50.2

 
 
Loss on Foreign Exchange Contracts
 
(1.2
)
 
(1.1
)
 
(1.6
)
 
Net Realized Investment Gain (Loss)
 
 
 
 
 
 
 
 
Gain on Interest Rate Swaps
 
0.2

 
3.2

 
0.5

 
 
Gain (Loss) on Foreign Exchange Contracts
 
(9.2
)
 
(1.4
)
 
36.1

 
Interest and Debt Expense
 
 
 
 
 
 
 
 
Loss on Interest Rate Swaps
 
(2.0
)
 
(1.9
)
 
(1.8
)
 
 
 
 
46.8


53.3

 
83.4

 
Income Tax Expense
 
16.3

 
18.6

 
27.1

 
Total
 
$
30.5


$
34.7

 
$
56.3

 
 
 
 
 
 
 
 
 
Unrecognized Pension and Postretirement Benefit Costs
 
 
 
 
 
 
 
Other Expenses
 
 
 
 
 
 
 
 
Amortization of Net Actuarial Loss
 
$
(20.3
)
 
$
(16.3
)
 
$
(11.9
)
 
 
Amortization of Prior Service Credit
 
0.7

 
0.5

 
0.3

 
 
 
 
(19.6
)

(15.8
)
 
(11.6
)
 
Income Tax Benefit
 
(6.7
)
 
(5.5
)
 
(4.0
)
 
Total
 
$
(12.9
)

$
(10.3
)
 
$
(7.6
)