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Earnings Per Unit (Tables)
 3 Months Ended
Mar. 31, 2022
Earnings Per Unit [Abstract]  
Basic and Diluted Earnings Per Unit
The following table presents our calculation of basic and diluted earnings per common unit for the periods indicated:

 
  
For the Three Months
Ended March 31,
  
 
  
2022
    
2021
  
BASIC EARNINGS PER COMMON UNIT
            
Net income attributable to common unitholders
  
$
1,296
    
$
1,341
  
Earnings allocated to phantom unit awards (1)
    
(11
)
    
(11
)
Net income allocated to common unitholders
  
$
1,285
    
$
1,330
  
 
                
Basic weighted-average number of common units outstanding
    
2,178
      
2,183
  
 
                
Basic earnings per common unit
  
$
0.59
    
$
0.61
  
 
                
DILUTED EARNINGS PER COMMON UNIT
                
Net income attributable to common unitholders
  
$
1,296
    
$
1,341
  
Net income attributable to preferred units
    
1
      
1
  
Net income attributable to limited partners
  
$
1,297
    
$
1,342
  
 
                
Diluted weighted-average number of units outstanding:
                
Distribution-bearing common units
    
2,178
      
2,183
  
Phantom units (2)
    
19
      
17
  
Preferred units (2)
    
2
      
3
  
Total
    
2,199
      
2,203
  
 
                
Diluted earnings per common unit
  
$
0.59
    
$
0.61
  

(1)
Phantom units are considered participating securities for purposes of computing basic earnings per unit. See Note 13 for information regarding our phantom units.
(2)
We use the “if-converted method” to determine the potential dilutive effect of the vesting of phantom unit awards and the conversion of preferred units outstanding.  See Note 13 for information regarding phantom unit awards.  See Note 8 for information regarding preferred units.