v2.4.0.6

Foreign Currency Risk Management And Derivatives (Narrative) (Detail) In Millions, unless otherwise specified				9 Months Ended
	Sep. 30, 2012 USD ($)	Dec. 31, 2011 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2012 Canadian Subsidiary's Intercompany Transactions [Member] USD ($)	Sep. 30, 2012 European Subsidiary's Intercompany Transactions [Member] USD ($)	Sep. 30, 2012 Pound Sterling Denominated Balance Sheet Amounts [Member] USD ($)	Sep. 30, 2012 Pound Sterling Denominated Balance Sheet Amounts [Member] EUR (€)
Derivative [Line Items]
Notional value of outstanding foreign currency forward contract				$ 30.7	$ 47.3	$ 10.2	€ 7.9
Maturity of foreign currency forward contract				1 month	1 month
Fair values of foreign currency forward contracts, liabilities	$ 1.3	$ 0.7	$ 0.5

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- Definition

Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 17

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

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- Definition

Maximum amount of time remaining before foreign currency exchange rate derivatives mature or expire, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Aggregate notional amount of foreign currency exchange rate derivatives. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

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