Impact of Derivative Instruments on Consolidated Financial Statements (Detail) (Cash Flow Hedging, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Derivatives designated as cash flow hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) Recognized in OCI on Derivatives	$ (5.0)		$ (5.4)		$ 0.8
Amount of Pre-Tax Gain (Loss) Reclassified from AOCI into Earnings	(5.0)	[1]			(1.6)	[1]
Derivatives designated as cash flow hedging instruments | Interest Rate Swap Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) Recognized in OCI on Derivatives	(5.0)		(5.4)		0.8
Amount of Pre-Tax Gain (Loss) Reclassified from AOCI into Earnings	(5.0)	[1]
Derivatives designated as cash flow hedging instruments | Foreign Exchange Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) Reclassified from AOCI into Earnings					(1.6)	[1]
Derivatives not receiving hedge accounting treatment
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) Recognized in Earnings on Derivatives	(1.7)	[1]	(1.1)	[1]	9.9	[1]
Amount of Pre-Tax Gain (Loss) Recognized in OCI on Derivatives					2.6
Amount of Pre-Tax Gain (Loss) Reclassified from AOCI into Earnings			(17.3)	[1]	(14.6)	[1]
Derivatives not receiving hedge accounting treatment | Interest Rate Swap Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) Recognized in Earnings on Derivatives			(1.4)	[1]	9.5	[1]
Amount of Pre-Tax Gain (Loss) Recognized in OCI on Derivatives					2.6	[2]
Amount of Pre-Tax Gain (Loss) Reclassified from AOCI into Earnings			(17.3)	[1]	(14.6)	[1]
Derivatives not receiving hedge accounting treatment | Foreign Exchange Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) Recognized in Earnings on Derivatives	$ (1.7)	[1]	$ 0.3	[1]	$ 0.4	[1]

[1] Amount recognized in earnings related to interest rate swap contracts is included in Interest expense and amounts recognized in earnings related to foreign exchange contracts is included in Cost of sales.

[2] Represents amount recognized in OCI during the first quarter of 2009 related to interest rate swaps for which hedge accounting was discontinued on April 1, 2009; however, these derivative financial instruments were effective as cash flow hedges until that date.