Derivatives and Hedging Activities - Fair Value of Derivative Instruments (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Fair Value of Asset Derivatives	$ 5.4	$ 20.6
Fair Value of (Liability) Derivatives	(30.4)	(3.5)
Foreign currency forward contracts [Member] | Designated as hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Asset Derivatives	0.5	0.5
Fair Value of (Liability) Derivatives	(0.8)	(0.5)
Foreign currency forward contracts [Member] | Not designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Asset Derivatives	4.9	18.0
Fair Value of (Liability) Derivatives	(29.6)	(3.0)
Interest rate swaps [Member] | Designated as hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Asset Derivatives		2.1
Fair Value of (Liability) Derivatives