Derivative Instruments and Hedging Activities (Tables)
 3 Months Ended
Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Gain (loss) recognized on non-designated derivative instruments
The following table summarizes the gain (loss) recognized on non-designated foreign-exchange derivative instruments for the three months ended March 31:
 
 
Three Months Ended
 
 
March 31,

 
2015
 
2014
Interest expense
 
$
(1.3
)
 
$
(1.4
)
Foreign exchange gain (loss), net
 
5.5

 
1.2

 
 
$
4.2

 
$
(0.2
)