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) (Nondesignated [Member], Fair Value Hedge [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest Rate Swap [Member] | Interest Income Expense Net [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income	$ 2.0	$ 1.0	$ 0.5	$ 2.1
Foreign Exchange Forward [Member] | Other Nonoperating Income Expense [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Income	$ 1.3	$ 1.0	$ 0.9	$ (0.1)