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NET INCOME PER COMMON UNIT (Tables)
9 Months Ended
Sep. 30, 2011
NET INCOME PER COMMON UNIT 
Schedule of net income per common unit
 
(unaudited)
  
Three months ended
September 30,
    
Nine months ended
September 30,
  
(millions of dollars except per common unit amounts)
  
2011
  
2010
  
2011
  
2010
Net income(a)
     40.7       38.6       119.1       100.0  
Net income allocated to General Partner:
                                
   General Partner interest
     (0.8 )     (0.8 )     (2.4 )     (2.0 )
   Incentive distribution income allocation
     -       -       -       -  
      (0.8 )     (0.8 )     (2.4 )     (2.0 )
Net income allocable to common units
     39.9       37.8       116.7       98.0  
Weighted average common units outstanding (millions)
     53.5       46.2       50.2       46.2  
Net income per common unit
     $0.75       $0.82       $2.33       $2.12  
 
(a) Includes equity earnings from GTN and Bison from May 3, 2011, date of acquisition, to September 30, 2011.