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Derivative Financial Instruments (Details) - USD ($)
$ in Millions
9 Months Ended
Aug. 08, 2011
Sep. 30, 2015
Dec. 31, 2014
Dec. 30, 2013
Dec. 30, 2011
Derivatives, Fair Value [Line Items]          
Term of interest rate swap (in years) 4 years        
Senior credit facility balance covered under interest rate swap contracts       $ 150.0 $ 250.0
Asset Derivatives          
Fair Value   $ 9.7 $ 1.8    
Liability Derivatives          
Fair Value   0.6 0.1    
Foreign Exchange Forward          
Derivatives, Fair Value [Line Items]          
Notional amount   82.9      
Expected gain   4.7      
Foreign Exchange Forward | Accrued expenses and other current liabilities          
Liability Derivatives          
Fair Value   0.6 0.1    
Derivatives designated as hedging instruments | Foreign Exchange Forward | Prepaid expenses and other current assets          
Asset Derivatives          
Fair Value   6.3 1.8    
Derivatives designated as hedging instruments | Foreign Exchange Forward | Other non-current assets          
Asset Derivatives          
Fair Value   1.3 0.0    
Derivatives not designated as hedging instruments | Foreign Exchange Forward | Prepaid expenses and other current assets          
Asset Derivatives          
Fair Value   $ 2.1 $ 0.0    
London Interbank Offered Rate (LIBOR)          
Derivatives, Fair Value [Line Items]          
Variable interest rate (as a percent)         1.25%