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Investments in Unconsolidated Affiliates (Tables)
 9 Months Ended
Sep. 30, 2023
Investments in Unconsolidated Affiliates [Abstract]  
Investments in Unconsolidated Affiliates
The following table presents our investments in unconsolidated affiliates by business segment at the dates indicated.  We account for these investments using the equity method.

   
September 30,
2023
    
December 31,
2022
  
NGL Pipelines & Services
  
$
618
    
$
640
  
Crude Oil Pipelines & Services
    
1,684
      
1,677
  
Natural Gas Pipelines & Services
    
32
      
32
  
Petrochemical & Refined Products Services
    
3
      
3
  
Total
  
$
2,337
    
$
2,352
  

The following table presents our equity in income of unconsolidated affiliates by business segment for the periods indicated:

   
For the Three Months
Ended September 30,
    
For the Nine Months
Ended September 30,
  
 
  
2023
    
2022
    
2023
    
2022
  
NGL Pipelines & Services
  
$
32
    
$
39
    
$
101
    
$
109
  
Crude Oil Pipelines & Services
    
89
      
70
      
241
      
221
  
Natural Gas Pipelines & Services
    
1
      
2
      
4
      
4
  
Petrochemical & Refined Products Services
    
–
      
–
      
1
      
1
  
Total
  
$
122
    
$
111
    
$
347
    
$
335