Financial Instruments And Risk Management (Derivatives Designated As Hedging Instruments Fair Values Of Derivative Instruments) (Details) (Designated As Hedging Instruments [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Asset Derivatives Designated as Hedging Instruments, Fair Value	$ 38,598	$ 29,773
Liability Derivatives Designated as Hedging Instruments, Fair Value	34,328	57,733
Prepaid Expenses And Other Current Assets [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Asset Derivatives Designated as Hedging Instruments, Fair Value	38,598	29,773
Other Current Liabilities [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Liability Derivatives Designated as Hedging Instruments, Fair Value	31,572	57,075
Other Current Liabilities [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Liability Derivatives Designated as Hedging Instruments, Fair Value	$ 2,756	$ 658