Location and Amounts of Gains on Derivative Instruments Not Designated as Hedging Instruments (Detail) (Forward currency contracts, Other (income) expense, net, USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Forward currency contracts | Other (income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Gain Recognized in Earnings	$ 0	[1]	$ 0	[1]	$ 0	[1]	$ 3.0	[1]

[1] These derivative contracts mitigate changes in the value of remeasured foreign currency denominated intercompany loans attributable to changes in foreign currency exchange rates.