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	Mar. 31, 2013	Dec. 31, 2012
Derivative [Line Items]
Asset Derivatives, Fair Value	$ 694,793	$ 642,118
Liability Derivatives, Fair Value	697,503	639,665
Prepaid expenses and other current assets | Foreign currency forward contracts
Derivative [Line Items]
Asset Derivatives, Fair Value	3,193	5,818
Other assets | Purchased cash convertible note hedge
Derivative [Line Items]
Asset Derivatives, Fair Value	691,600	636,300
Other current liabilities | Foreign currency forward contracts
Derivative [Line Items]
Liability Derivatives, Fair Value	5,903	3,365
Long-term debt | Cash conversion feature of Cash Convertible Notes
Derivative [Line Items]
Liability Derivatives, Fair Value	$ 691,600	$ 636,300