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Fair Value Measurements and Other Financial Instruments - Fair Value Hierarchy of Financial Instruments (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash equivalents $ 71.3 $ 56.3
Compensating balance deposits 52.9 56.5
Level 1 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash equivalents 71.3 48.3
Compensating balance deposits 52.9 56.5
Level 2 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash equivalents   8.0
Foreign Currency Forward Contracts [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Derivative financial instruments net asset (liability) 4.7 (16.5)
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) 4.7 (16.5)
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) 23.9 44.0
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) 23.9 44.0
Cross-Currency Swaps [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Derivative financial instruments net asset (liability) (5.3) (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) $ (5.3) $ (12.0)