Derivatives and Hedging Activities - Effect of Derivative Instruments on Condensed Consolidated Statements of Operations (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Derivative Instruments Gain Loss [Line Items]
Interest expenses	$ 287.7	$ 361.0	[1]	$ 384.7	[1]
Designated as Hedging Instruments [Member] | Interest Rate And Currency Swaps [Member]
Derivative Instruments Gain Loss [Line Items]
Gain on interest rate and currency swaps	16.5
Interest expenses	$ 3.0

[1] Certain amounts have been revised to reflect the retrospective application of the Company’s change in inventory costing method for certain U.S. inventories to the FIFO method from the LIFO method. Refer to Note 2, “Summary of Significant Accounting Policies - Inventories,” of the notes to consolidated financial statements for further details surrounding this accounting policy change.