Cash Flow Hedge Derivative Gains and Losses Recognized in AOCI and the Amounts Reclassified to Earnings (Detail) (Asset And Liability Management, Foreign Exchange Contracts, 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]
Net Gain/(Loss) Recognized in AOCI	$ (0.1)	$ (15.8)	$ (9.3)	$ 2.9
Net Gain/(Loss) Reclassified from AOCI to Earnings	(2.8)	(1.7)	(4.6)	(0.9)
Net Gain/(Loss) Reclassified from AOCI to Earnings
Derivative Instruments, Gain (Loss) [Line Items]
Other Operating Income	(1.0)	(0.8)	(1.7)	(2.3)
Other Operating Expense	$ (1.8)	$ (0.9)	$ (2.9)	$ 1.4