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Accumulated Other Comprehensive Income (Loss)
12 Months Ended
Dec. 31, 2017
Stockholders' Equity Note [Abstract]  
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Loss
The following table sets forth the changes in each component of accumulated other comprehensive loss, net of tax:
(in millions)
Foreign Currency
Translation
Adjustment
 
Net Unrealized
Gain/(Loss)
On Hedges
 
Net Unrealized
Gain/(Loss) On 
Available-for-sale
Securities
 
Accumulated Other
Comprehensive Loss
Balance, December 31, 2014
$
(116.8
)
 
$
(0.8
)
 
$
0.1

 
$
(117.5
)
Change
(74.8
)
 
0.5

 

 
(74.3
)
Balance, December 31, 2015
$
(191.6
)

$
(0.3
)
 
$
0.1

 
$
(191.8
)
Change
24.0

 
(7.2
)
 
0.2

 
17.0

Balance, December 31, 2016
$
(167.6
)
 
$
(7.5
)
 
$
0.3

 
$
(174.8
)
Change
33.1

 
6.5

 
(0.1
)
 
39.5

Balance, December 31, 2017
$
(134.5
)
 
$
(1.0
)
 
$
0.2

 
$
(135.3
)