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Debt (Debt) (Details) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Debt Instrument [Line Items]    
Indebtedness to banks under credit facilities $ 90,000,000 $ 481,300,000
Term loan ($1.4 billion face value) due 2018 1,386,292,000  
Other 9,356,000 21,903,000
Total 4,575,611,000 4,043,148,000
Less current maturities of debt and short-term borrowings 111,260,000 280,851,000
Long-term debt 4,464,351,000 3,762,297,000
6.75% Senior Notes Due 2013 [Member]
   
Debt Instrument [Line Items]    
Senior notes   450,971,000
Senior notes interest rate 6.75%  
Face value of senior notes 450,000,000  
8.75% Senior Notes Due 2016 [Member]
   
Debt Instrument [Line Items]    
Senior notes 589,963,000 588,974,000
Senior notes interest rate 8.75%  
Face value of senior notes 600,000,000  
7.00% Senior Notes Due 2019 [Member]
   
Debt Instrument [Line Items]    
Senior notes 1,000,000,000 1,000,000,000
Senior notes interest rate 7.00%  
7.25% Senior Notes Due 2020 [Member]
   
Debt Instrument [Line Items]    
Senior notes 500,000,000 500,000,000
Senior notes interest rate 7.25%  
7.25% Senior Notes Due 2021 [Member]
   
Debt Instrument [Line Items]    
Senior notes $ 1,000,000,000 $ 1,000,000,000
Senior notes interest rate 7.25%