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Receivables
 9 Months Ended
Sep. 30, 2013
Receivables [Abstract]  
Receivables
Note 4: Receivables
 
Receivables consisted of the following (in millions):

 
 
September 30,
2013
  
December 31,
2012
 
 
 
  
 
Trade receivables
 
$
2,275.5
  
$
1,823.2
 
Other receivables
  
203.9
   
151.4
 
Allowance for doubtful accounts
  
(11.7
)
  
(7.9
)
Total receivables
 
$
2,467.7
  
$
1,966.7