Cash Flow Hedge Derivative Gains and Losses Recognized in AOCI and the Amounts Reclassified to Earnings (Detail) (Asset And Liability Management, USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Foreign Exchange Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Net Gain/(Loss) Recognized in AOCI	$ (6.9)	$ 5.3	$ (5.8)	$ (4.0)
Net Gain/(Loss) Reclassified from AOCI to Earnings	0.7	(1.1)	3.2	(5.7)
Interest Rate Option Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Net Gain/(Loss) Recognized in AOCI	(0.7)		(0.7)
Net Gain/(Loss) Reclassified from AOCI to Earnings	0.1		0.1
Net Gain/(Loss) Reclassified from AOCI to Earnings | Foreign Exchange Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Other Operating Income	0.7		3.4	(1.8)
Other Operating Expense		$ (1.1)	$ (0.2)	$ (3.9)