Fair Value Measurements and Other Financial Instruments - Fair Value Hierarchy of Financial Instruments (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	$ 76.3	$ 56.3
Compensating balance deposits	55.0	56.5
Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	76.3	48.3
Compensating balance deposits	55.0	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 and Options [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative financial instruments net asset (liability)	1.8
Foreign Currency Forward Contracts and Options [Member] | Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative financial instruments net asset (liability)	1.8
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)	23.1	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)	23.1	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)	(29.2)	(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)	$ (29.2)	(12.0)
Foreign Currency Forward Contracts [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative financial instruments net asset (liability)		(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)		$ (16.5)