Impact of Derivative Financial Instruments on Condensed Consolidated Financial Statements (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-tax Gain (Loss) Recognized in Earnings	$ (0.2)	$ (0.2)	$ (0.3)	$ 0.8
Amount of Pre-tax (Loss) Recognized in OCI	(0.2)	(0.9)	0.1	(1.6)
Amount of Pre-tax Loss Reclassified from AOCI into Earnings	(0.7)	0	(1.4)	0
Designated as Hedging Instrument | Interest rate swap contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-tax Gain (Loss) Recognized in Earnings	0	0	0	0
Amount of Pre-tax (Loss) Recognized in OCI	0.1	(0.9)	0.1	(1.6)
Amount of Pre-tax Loss Reclassified from AOCI into Earnings	(0.7)	0	(1.4)	0
Designated as Hedging Instrument | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-tax Gain (Loss) Recognized in Earnings	0	0
Amount of Pre-tax (Loss) Recognized in OCI	(0.3)	0
Amount of Pre-tax Loss Reclassified from AOCI into Earnings	0	0
Not Designated as Hedging Instrument | Interest rate swap contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-tax Gain (Loss) Recognized in Earnings			0	(0.1)
Amount of Pre-tax (Loss) Recognized in OCI			0	0
Amount of Pre-tax Loss Reclassified from AOCI into Earnings			0	0
Not Designated as Hedging Instrument | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-tax Gain (Loss) Recognized in Earnings	(0.2)	(0.2)	(0.3)	0.9
Amount of Pre-tax (Loss) Recognized in OCI	0	0		0
Amount of Pre-tax Loss Reclassified from AOCI into Earnings	$ 0	$ 0		$ 0