Financial Instruments and Risk Management (Derivatives Designated as Hedging Instruments Fair Values of Derivative Instruments) (Details) (Designated as Hedging Instrument [Member], USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Asset Derivatives Designated as Hedging Instrument, Fair Value	$ 15,221	$ 8,884
Liability Derivatives Designated as Hedging Instrument, Fair Value	1,007,287	934,921
Prepaid Expenses and Other Current Assets [Member] | Foreign Currency Forward Contracts [Member]
Asset Derivatives Designated as Hedging Instrument, Fair Value	15,221	8,884
Other Current Liabilities [Member] | Interest Rate Swaps [Member]
Liability Derivatives Designated as Hedging Instrument, Fair Value	21,078	25,666
Long-Term Debt [Member] | Foreign Currency Borrowings [Member]
Liability Derivatives Designated as Hedging Instrument, Fair Value	$ 986,209	$ 909,255