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Earnings Per Unit (Tables)
 12 Months Ended
Dec. 31, 2023
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 years indicated:

 
  
For the Year Ended December 31,
  
 
  
2023
    
2022
    
2021
  
BASIC EARNINGS PER COMMON UNIT
                  
Net income attributable to common unitholders
  
$
5,529
    
$
5,487
    
$
4,634
  
Earnings allocated to phantom unit awards (1)
    
(50
)
    
(46
)
    
(37
)
Net income allocated to common unitholders
  
$
5,479
    
$
5,441
    
$
4,597
  
 
                        
Basic weighted-average number of common units outstanding
    
2,172
      
2,178
      
2,183
  
 
                        
Basic earnings per common unit
  
$
2.52
    
$
2.50
    
$
2.11
  
 
                        
DILUTED EARNINGS PER COMMON UNIT
                        
Net income attributable to common unitholders
  
$
5,529
    
$
5,487
    
$
4,634
  
Net income attributable to preferred units
    
3
      
3
      
4
  
Net income attributable to limited partners
  
$
5,532
    
$
5,490
    
$
4,638
  
 
                        
Diluted weighted-average number of units outstanding:
                        
Distribution-bearing common units
    
2,172
      
2,178
      
2,183
  
Phantom units (2)
    
20
      
19
      
18
  
Preferred units (2)
    
2
      
2
      
2
  
Total
    
2,194
      
2,199
      
2,203
  
 
                        
Diluted earnings per common unit
  
$
2.52
    
$
2.50
    
$
2.10
  

(1)
Phantom units are considered participating securities for purposes of computing basic earnings per unit. See Note 13 for information regarding the 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 8 for information regarding preferred units.