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Fair Value Measurements and Other Financial Instruments - Fair Value Hierarchy of Financial Instruments (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash equivalents $ 56.3 $ 28.5
Compensating balance deposits 56.5 36.2
Level 1 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash equivalents 48.3 23.2
Compensating balance deposits 56.5 36.2
Level 2 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash equivalents 8.0 5.3
Foreign Currency Forward Contracts [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Derivative financial instruments net asset (liability) (16.5) (22.4)
Foreign Currency Forward Contracts [Member] | Level 2 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Derivative financial instruments net asset (liability) (16.5) (22.4)
Interest Rate and Currency Swap [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Derivative financial instruments net asset (liability) 44.0 17.8
Interest Rate and Currency Swap [Member] | Level 2 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Derivative financial instruments net asset (liability) 44.0 $ 17.8
Cross-Currency Swaps [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Derivative financial instruments net asset (liability) (12.0)  
Cross-Currency Swaps [Member] | Level 2 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Derivative financial instruments net asset (liability) $ (12.0)