Derivative Instruments - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 0.2	$ 720.7
Derivative Liability, Fair Value, Gross Liability	312.2	56.2
Derivatives Designated as Cash Flow Hedges | Foreign Currency | Prepaid and Other Current Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	0.2	2.8
Derivatives Designated as Cash Flow Hedges | Foreign Currency | Other Accrued Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability	66.8	55.1
Derivatives Designated as Cash Flow Hedges | Forward Currency Contracts | Other Accrued Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability	4.3	1.1
Derivatives Designated as Net Investment Hedges | Foreign Currency | Derivative Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	0.0	717.9
Derivatives Designated as Net Investment Hedges | Forward Currency Contracts | Other Noncurrent Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 241.1	$ 0.0