Derivative Instruments and Hedging Activities - Fair Value of Derivative Instruments on Gross Basis (Detail) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 47.1	$ 15.9
Derivative Liabilities	50.0	147.2
Other Current Assets [Member] | Derivatives Not Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets		1.5
Other Current Liabilities [Member] | Derivatives Not Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities		3.8
Foreign Exchange Forward Contracts [Member] | Other Current Assets [Member] | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	21.3	12.2
Foreign Exchange Forward Contracts [Member] | Other Current Assets [Member] | Derivatives Not Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets		1.5
Foreign Exchange Forward Contracts [Member] | Other Assets [Member] | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	15.0	3.7
Foreign Exchange Forward Contracts [Member] | Other Current Liabilities [Member] | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	22.0	37.4
Foreign Exchange Forward Contracts [Member] | Other Current Liabilities [Member] | Derivatives Not Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities		3.8
Foreign Exchange Forward Contracts [Member] | Other Long-term Liabilities [Member] | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	12.7	26.5
Cross-currency Interest Rate Swaps [Member] | Other Current Assets [Member] | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0.2
Cross-currency Interest Rate Swaps [Member] | Other Assets [Member] | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	10.6
Cross-currency Interest Rate Swaps [Member] | Other Current Liabilities [Member] | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	13.9	55.0
Cross-currency Interest Rate Swaps [Member] | Other Long-term Liabilities [Member] | Derivatives Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$ 1.4	$ 28.3