Financial Instruments And Risk Management (Fair Values Of Derivative Instruments, Derivatives Designated As Hedging Instruments) (Details) (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	$ 199,105	$ 36,647
Liability Derivatives, Fair Value	54,246	25,686
Prepaid expenses and other current assets | Interest rate swaps
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	82,688	36,647
Other assets | Interest rate swaps
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	116,417
Other current liabilities | Interest rate swaps
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	2,580	9,823
Other current liabilities | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	$ 51,666	$ 15,863