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FINANCIAL INSTRUMENTS (Details) (USD $)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2011
Jun. 30, 2011
4.75% Senior Notes Due 2020 [Member]
Interest rate swaps [Member]
Dec. 31, 2010
4.75% Senior Notes Due 2020 [Member]
Interest rate swaps [Member]
Jun. 30, 2011
Interest rate swaps [Member]
Designated as Hedging Instrument [Member]
Other assets [Member]
Dec. 31, 2010
Interest rate swaps [Member]
Designated as Hedging Instrument [Member]
Other assets [Member]
Jun. 30, 2011
Foreign currency forward contracts [Member]
Not Designated as Hedging Instrument [Member]
Other current assets [Member]
Dec. 31, 2010
Foreign currency forward contracts [Member]
Not Designated as Hedging Instrument [Member]
Other current assets [Member]
Jun. 30, 2011
Foreign currency forward contracts [Member]
Not Designated as Hedging Instrument [Member]
Other current liabilities [Member]
Dec. 31, 2010
Foreign currency forward contracts [Member]
Not Designated as Hedging Instrument [Member]
Other current liabilities [Member]
Jun. 30, 2011
Interest rate swaps [Member]
Mar. 31, 2011
Interest Rate Lock Agreements [Member]
Cash Flow Hedging [Member]
Jun. 30, 2011
Interest Rate Lock Agreements [Member]
Cash Flow Hedging [Member]
Jun. 30, 2011
Asset [Member]
Dec. 31, 2010
Asset [Member]
Mar. 31, 2011
Fair Value Hedging [Member]
Dec. 31, 2009
Fair Value Hedging [Member]
Jun. 30, 2011
Cash Flow Hedging [Member]
Dec. 31, 2010
Cash Flow Hedging [Member]
Notional Amount of Interest Rate Cash Flow Hedge Derivatives                       $ 400,000,000            
Derivative, Maturity Date Apr. 05, 2011
Gain (loss) on settlement of derivative instruments                                 3,100,000  
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges                                 8,100,000 6,600,000
Derivative asset designated as hedging instrument fair value   15,500,000 10,500,000             3,400,000                
Total Net Derivatives Asset       18,939,000 10,483,000 1,094,000 4,527,000                      
Total Net Derivatives Liabilities               110,000 464,000                  
Derivative, Fair Value, Net                         19,923,000 14,546,000        
Fair Value hedges - Fixed to Variable interest rate swaps                             200,000,000 350,000,000    
Variable Interest Rate                             0.54% 1.33%    
Net amount of deferred gains and losses on cash flow hedges that is expected to be reclassified within the next 12 months                                 1,300,000  
Notional amount of foreign currency forward contracts $ 55,400,000