Derivatives - Schedule of Fair Value of Derivative Financial Instruments (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Fair Value of Derivatives, Asset	$ 12.1	$ 14.9
Fair Value of Derivatives, Liability	57.8	56.7
Derivatives Designated as Effective Hedges [Member] | Cash Flow Hedges [Member] | Cross-currency Swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Derivatives, Liability	24.9	21.5
Derivatives Designated as Effective Hedges [Member] | Cash Flow Hedges [Member] | Foreign Currency Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Derivatives, Asset	2.6	2.0
Fair Value of Derivatives, Liability	6.9	6.6
Derivatives Designated as Effective Hedges [Member] | Fair Value Hedges [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Derivatives, Liability	16.3	7.8
Derivatives Not Designated as Effective Hedges [Member] | Foreign Currency Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Derivatives, Asset	9.4	12.7
Fair Value of Derivatives, Liability	9.7	20.8
Derivatives Not Designated as Effective Hedges [Member] | Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Derivatives, Asset	$ 0.1	$ 0.2