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Intangible Assets and Goodwill
 3 Months Ended
Mar. 31, 2024
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:

   
March 31, 2024
    
December 31, 2023
  
 
  
Gross
Value
    
Accumulated
Amortization
    
Carrying
Value
    
Gross
Value
    
Accumulated
Amortization
    
Carrying
Value
  
NGL Pipelines & Services:
                                    
Customer relationship intangibles
  
$
449
    
$
(267
)
  
$
182
    
$
449
    
$
(263
)
  
$
186
  
Contract-based intangibles
    
752
      
(116
)
    
636
      
752
      
(110
)
    
642
  
Segment total
    
1,201
      
(383
)
    
818
      
1,201
      
(373
)
    
828
  
Crude Oil Pipelines & Services:
                                                
Customer relationship intangibles
    
2,195
      
(555
)
    
1,640
      
2,195
      
(530
)
    
1,665
  
Contract-based intangibles
    
283
      
(275
)
    
8
      
283
      
(275
)
    
8
  
Segment total
    
2,478
      
(830
)
    
1,648
      
2,478
      
(805
)
    
1,673
  
Natural Gas Pipelines & Services:
                                                
Customer relationship intangibles
    
1,351
      
(634
)
    
717
      
1,351
      
(625
)
    
726
  
Contract-based intangibles
    
641
      
(213
)
    
428
      
641
      
(209
)
    
432
  
Segment total
    
1,992
      
(847
)
    
1,145
      
1,992
      
(834
)
    
1,158
  
Petrochemical & Refined Products Services:
                                                
Customer relationship intangibles
    
181
      
(87
)
    
94
      
181
      
(86
)
    
95
  
Contract-based intangibles
    
45
      
(30
)
    
15
      
45
      
(29
)
    
16
  
Segment total
    
226
      
(117
)
    
109
      
226
      
(115
)
    
111
  
Total intangible assets
  
$
5,897
    
$
(2,177
)
  
$
3,720
    
$
5,897
    
$
(2,127
)
  
$
3,770
  

The following table presents the amortization expense of our intangible assets by business segment for the periods indicated:

 
  
For the Three Months
Ended March 31,
  
 
  
2024
    
2023
  
NGL Pipelines & Services
  
$
10
    
$
9
  
Crude Oil Pipelines & Services
    
25
      
23
  
Natural Gas Pipelines & Services
    
13
      
12
  
Petrochemical & Refined Products Services
    
2
      
2
  
Total
  
$
50
    
$
46
  

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

Remainder
of 2024
    
2025
    
2026
    
2027
    
2028
  
$
160
    
$
208
    
$
203
    
$
185
    
$
180
  

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 2023 Form 10-K.