Other Operating Expenses (Income), net - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2014 USD ($)
Components Of Other Income And Expense [Line Items]
Net loss on derivatives	$ 133.0
Foreign currency derivatives, premium	59.9
Gain (loss) due to change in fair value	(34.5)
Net gain related to the reclassification of amounts from AOCI	13.4
Cross Currency Interest Rate Contract [Member]
Components Of Other Income And Expense [Line Items]
Gain (loss) due to change in fair value	(165.8)
2014 Term Loan Facility [Member]
Components Of Other Income And Expense [Line Items]
Gain (loss) due to change in fair value	$ 88.9