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Intangible Assets and Goodwill
 9 Months Ended
Sep. 30, 2023
Intangible Assets and Goodwill [Abstract]  
Intangible Assets and Goodwill
Note 6.  Intangible Assets and Goodwill

Identifiable Intangible Assets

The following table summarizes our intangible assets by business segment at the dates indicated:

   
September 30, 2023
    
December 31, 2022
  
 
  
Gross
Value
    
Accumulated
Amortization
    
Carrying
Value
    
Gross
Value
    
Accumulated
Amortization
    
Carrying
Value
  
NGL Pipelines & Services:
                                    
Customer relationship intangibles
  
$
449
    
$
(260
)
  
$
189
    
$
449
    
$
(249
)
  
$
200
  
Contract-based intangibles
    
752
      
(102
)
    
650
      
749
      
(84
)
    
665
  
Segment total
    
1,201
      
(362
)
    
839
      
1,198
      
(333
)
    
865
  
Crude Oil Pipelines & Services:
                                                
Customer relationship intangibles
    
2,195
      
(504
)
    
1,691
      
2,195
      
(431
)
    
1,764
  
Contract-based intangibles
    
283
      
(274
)
    
9
      
283
      
(271
)
    
12
  
Segment total
    
2,478
      
(778
)
    
1,700
      
2,478
      
(702
)
    
1,776
  
Natural Gas Pipelines & Services:
                                                
Customer relationship intangibles
    
1,350
      
(615
)
    
735
      
1,350
      
(588
)
    
762
  
Contract-based intangibles
    
640
      
(205
)
    
435
      
639
      
(195
)
    
444
  
Segment total
    
1,990
      
(820
)
    
1,170
      
1,989
      
(783
)
    
1,206
  
Petrochemical & Refined Products Services:
                                                
Customer relationship intangibles
    
181
      
(85
)
    
96
      
181
      
(80
)
    
101
  
Contract-based intangibles
    
45
      
(29
)
    
16
      
45
      
(28
)
    
17
  
Segment total
    
226
      
(114
)
    
112
      
226
      
(108
)
    
118
  
Total intangible assets
  
$
5,895
    
$
(2,074
)
  
$
3,821
    
$
5,891
    
$
(1,926
)
  
$
3,965
  

The following table presents the amortization expense of our intangible assets 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
  
$
10
    
$
10
    
$
29
    
$
27
  
Crude Oil Pipelines & Services
    
28
      
21
      
76
      
62
  
Natural Gas Pipelines & Services
    
12
      
13
      
37
      
38
  
Petrochemical & Refined Products Services
    
2
      
2
      
6
      
5
  
Total
  
$
52
    
$
46
    
$
148
    
$
132
  

The following table presents our forecast of amortization expense associated with existing intangible assets for the periods indicated:

Remainder
of 2023
    
2024
    
2025
    
2026
    
2027
  
$
55
    
$
222
    
$
231
    
$
237
    
$
236
  

Goodwill

Goodwill represents the excess of the purchase price of an acquired business over the amounts assigned to assets acquired and liabilities assumed in the transaction.  There has been no change in our goodwill amounts since those reported in our 2022 Form 10-K.