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Derivative Financial Instruments and Certain Hedging Activities (Amount and Location of Gains (Losses) for Derivatives not Designated as Hedges) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ 0.2	$ (4.1)
Not Designated As Hedging Instrument [Member] \| Other (Expense) Income Net [Member] \| Foreign Currency Forwards [Member]
Derivative [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ 0.2	$ (4.1)

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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