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Accounts Payable and Accrued Liabilities
 12 Months Ended
Dec. 31, 2011
Accounts Payable and Accrued Liabilities, Current [Abstract]  
Accounts Payable and Accrued Liabilities
5. ACCOUNTS PAYABLE AND ACCRUED LIABILITES

   
December 31,
 
   
2011
    
2010
  
   
(millions)
  
Trade payables
  $ 20.2     $ 36.3  
Compensation and benefits
    45.2       61.3  
American Centrifuge accrued liabilities
    11.0       14.5  
Accrued property and other taxes payable
     10.9       9.8  
Accrued lease turnover – current
    -       10.5  
Accrued interest payable on debt
    4.7       5.3  
Other accrued liabilities
    28.1       34.7  
    $ 120.1     $ 172.4  

 
The decline in accounts payable and accrued liabilities is primarily due to the Portsmouth site transition to the D&D contractor in 2011, reduced ACP related activities, and reduced compensation related accruals.