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Derivative Instruments, Balance Sheet Location (Details) (Foreign Exchange Contract [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset Designated as Hedging Instrument, Fair Value	$ 0.4	$ 0.4
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability Designated as Hedging Instrument, Fair Value	$ 9.6	$ 2.6

Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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- Definition

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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