Financial Instruments And Risk Management (Fair Values Of Derivative Instruments, Derivatives Not Designated As Hedging Instruments) (Details) (Not Designated as Hedging Instruments, USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 785,215	$ 642,118
Liability Derivatives, Fair Value	785,271	639,665
Prepaid expenses and other current assets | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	5,515	5,818
Other assets | Purchased cash convertible note hedge
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	779,700	636,300
Other current liabilities | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	5,571	3,365
Long-term debt | Cash conversion feature of Cash Convertible Notes
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	$ 779,700	$ 636,300