Summary of Net Gain (Loss) on Foreign Exchange Forwards Not Designated as Hedging Instruments and on Interest Rate Swaps Designated as Fair Value Hedge (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Designated As Hedging Instrument [Member] | Interest Rate Swap [Member] | Interest Income Expense Net [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income		$ 1.1
Designated As Hedging Instrument [Member] | Interest Rate Swap [Member] | Interest Income Expense Net [Member] | Fair Value Hedge [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income	(1.5)
Nondesignated [Member] | Foreign Exchange Forward [Member] | Other Nonoperating Income Expense [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income	$ (0.4)	$ (1.1)