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Commercial Commitments (Tables)
6 Months Ended
Jun. 30, 2011
Commercial Commitments [Abstract]  
Commercial Commitments
                 
    June 30     December 31  
    2011     2010  
Affiliate guarantees
  $ 50.0     $ 30.0  
Asset residual value guarantees
    49.3       48.0  
Lease payment guarantees
    49.9       52.7  
 
           
Total guarantees (a)
    149.2       130.7  
Standby letters of credit and bonds
    11.0       11.5  
 
           
 
  $ 160.2     $ 142.2