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Quarterly Financial Information (Unaudited)
 12 Months Ended
Dec. 31, 2013
Quarterly Financial Information (Unaudited) [Abstract]  
Quarterly Financial Information (Unaudited)
Note 20.  Quarterly Financial Information (Unaudited)

The following table presents selected quarterly financial data for the periods indicated:

 
 
First
Quarter
  
Second
Quarter
  
Third
Quarter
  
Fourth
Quarter
 
For the Year Ended December 31, 2013:
 
  
  
  
 
Revenues
 
$
11,383.1
  
$
11,149.3
  
$
12,093.3
  
$
13,101.3
 
Operating income
  
957.7
   
774.2
   
819.9
   
915.5
 
Net income
  
755.3
   
553.3
   
592.8
   
705.7
 
Net income attributable to limited partners
  
753.5
   
552.5
   
592.0
   
698.9
 
 
                
Earnings per unit:
                
Basic
 
$
0.85
  
$
0.62
  
$
0.66
  
$
0.77
 
Diluted
 
$
0.83
  
$
0.60
  
$
0.64
  
$
0.75
 
 
                
For the Year Ended December 31, 2012:
                
Revenues
 
$
11,252.5
  
$
9,789.8
  
$
10,468.7
  
$
11,072.1
 
Operating income
  
748.9
   
749.1
   
788.5
   
822.7
 
Net income
  
655.5
   
567.2
   
587.9
   
617.4
 
Net income attributable to limited partners
  
651.3
   
566.3
   
586.8
   
615.5
 
 
                
Earnings per unit:
                
Basic
 
$
0.76
  
$
0.66
  
$
0.68
  
$
0.70
 
Diluted
 
$
0.73
  
$
0.64
  
$
0.66
  
$
0.68
 

The sum of our quarterly earnings per unit amounts may not equal our full year amounts due to slight rounding differences.