Derivatives and Fair Value Measurements - Location and Amount of Gains and Losses Reported in Consolidated Statements of Operations (Detail) (Derivatives not designated as hedging instruments under ASC 815 [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) recognized in income on derivatives, Total	$ (0.3)	$ 1.4	$ (1.8)
Foreign exchange contracts [Member] | Other income and (expense), net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) recognized in income on derivatives, Total		0.1	0.2
Commodity contracts [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) recognized in income on derivatives, Total	(0.3)	1.3	(1.9)
Natural gas commodity contracts [Member] | Operating Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/(loss) recognized in income on derivatives, Total			$ (0.1)