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Financial Instruments and Hedging Activities, Concentrations of Credit Risk and Fair Value of Financial Instruments.

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Fixed Interest rate on Hedged Debt.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The face amount of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

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The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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

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The difference between the book value and the sale price of agreements to purchase or sell mineral resources, energy, and agricultural products at some future point. This element refers to the gain (loss) included in earnings and not to the cash proceeds.

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Aggregate notional amount of all price risk derivatives designated as hedging instruments in cash flow hedges. Notional amount refers to the number of currency units specified in the price risk derivative contract. Excludes notional amount expressed in nonmonetary terms such as for a commodity forward contract.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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Financial Instruments and Hedging Activities, Concentrations of Credit Risk and Fair Value of Financial Instruments (Details Textual)	6 Months Ended				1 Months Ended
	Jun. 30, 2011 USD ($)	Jun. 30, 2010 USD ($)	Dec. 31, 2010 USD ($)	Oct. 25, 2005 EUR (€)	Oct. 31, 2005 Fixed-rate debt maturing in November 2012 USD [Member] USD ($)	Oct. 31, 2005 Fixed-rate debt maturing in November 2012 EUR [Member] EUR (€)	Jun. 30, 2011 Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2010 Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Jun. 30, 2011 Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2010 Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)
Debt Instrument [Line Items]
Fixed Interest rate on Hedged Debt					5.25%	3.55%
Long term debt					$ 325,000,000	€ 272,600,000
Proceeds from long term debt issuance					325,000,000	272,600,000
Partially fund repayment of debt				300,000,000
Fair Value of Financial Instruments Other than Derivatives (Textuals) [Abstract]
Total Debt							1,430,000,000	1,430,000,000	1,540,000,000	1,520,000,000
Financial Instruments and Hedging Activities, Concentrations of Credit Risk and Fair Value of Financial Instruments (Textuals) [Abstract]
Currency forward exchange contracts representing assets	33,900,000		48,700,000
Currency forward exchange contracts representing liabilities	22,600,000		38,300,000
Recognized net gain for commodity swaps	1,600,000	1,700,000
Net loss on derivatives designated as cash flow hedges to be reclassified during next 12 months	300,000
Contractual amounts of Cooper's commodity swap contracts	20,000,000		14,000,000
Aggregate notional value of other instruments	$ 118,600,000		$ 108,700,000
Fair Value, Concentration of Risk, Accounts Receivable	4.80%		5.00%