Derivatives and Hedging Activities - Fair Value of Derivative Instruments (Parenthetical) (Detail) € in Millions, $ in Millions		Jun. 30, 2016 USD ($)	Jun. 30, 2016 EUR (€)	Dec. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2015 EUR (€)
Offsetting Liabilities [Line Items]
Long-term debt, less current portion	[1]	$ 4,259.1		$ 4,266.8
Gross position, Other Assets		35.7		72.2
Total Derivative Liabilities		(32.4)		(56.8)
Other Current Assets [Member]
Offsetting Liabilities [Line Items]
Gross position, Other Assets		14.5		36.2
Impact of master netting agreements		(0.4)		(24.1)
Net amounts recognized on the Condensed Consolidated Balance Sheet		14.1		12.1
Other Non-current Assets [Member]
Offsetting Liabilities [Line Items]
Gross position, Other Assets		21.2		36.0
Net amounts recognized on the Condensed Consolidated Balance Sheet		21.2		36.0
Other Current Liabilities [Member]
Offsetting Liabilities [Line Items]
Total Derivative Liabilities		(12.8)		(44.8)
Impact of master netting agreements		0.4		24.1
Net amounts recognized on the Condensed Consolidated Balance Sheet		(12.4)		(20.7)
Other Non-current Liabilities [Member]
Offsetting Liabilities [Line Items]
Total Derivative Liabilities		(19.6)		(12.0)
Net amounts recognized on the Condensed Consolidated Balance Sheet		(19.6)		(12.0)
Foreign Currency Forward Contracts [Member]
Offsetting Liabilities [Line Items]
Gross position, Other Assets		8.6		28.2
Total Derivative Liabilities		(12.8)		$ (44.8)
Foreign Currency Forward Contracts [Member] | Designated as Hedging Instruments [Member]
Offsetting Liabilities [Line Items]
Long-term debt, less current portion		$ 441.0	€ 400		$ 433.0	€ 400

[1] As of January 1, 2016, we have adopted ASU 2015-03 and ASU 2015-15 with retrospective application. This resulted in a reclassification from other non-current assets to long-term debt, less current portion for debt issuance costs. Refer to Note 2, “Recently Issued Accounting Standards” of the notes to the condensed consolidated financial statements for further details.