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Supplemental Cash Flow Information (Tables)
 3 Months Ended
Mar. 31, 2018
Supplemental Cash Flow Information [Abstract]  
Net Effect of Changes in Operating Assets and Liabilities
The following table presents the net effect of changes in our operating accounts for the periods indicated:

 
 
For the Three Months
Ended March 31,
 
 
 
2018
  
2017
 
Decrease (increase) in:
      
Accounts receivable – trade
 
$
(106.8
)
 
$
110.1
 
Accounts receivable – related parties
  
(0.8
)
  
(0.6
)
Inventories
  
(19.5
)
  
(71.9
)
Prepaid and other current assets
  
(71.9
)
  
249.0
 
Other assets
  
(10.3
)
  
(2.2
)
Increase (decrease) in:
        
Accounts payable – trade
  
(53.1
)
  
6.5
 
Accounts payable – related parties
  
(0.9
)
  
(21.1
)
Accrued product payables
  
328.4
   
(16.8
)
Accrued interest
  
(147.3
)
  
(137.9
)
Other current liabilities
  
(106.9
)
  
(400.2
)
Other liabilities
  
(14.0
)
  
(3.7
)
Net effect of changes in operating accounts
 
$
(203.1
)
 
$
(288.8
)