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Long-Term Debt (Tables)
6 Months Ended
Jun. 30, 2011
Credit Agreement/Long-Term Debt [Abstract]  
Long-Term Debt
                 
    June 30,     December 31,  
    2011     2010  
    (In millions)  
2019 Notes – 8.125% Notes due 2019
  $ 780     $ 769  
2020 Notes – 6.875% Notes due 2020
    750       750  
2040 Notes – 8.125% Notes due 2040
    250       250  
 
           
Total long-term debt
  $ 1,780     $ 1,769