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Revenues and Accounts Receivable (Tables)
12 Months Ended
Dec. 31, 2018
Disaggregation of Revenue [Line Items]  
Disaggregation of Revenue
The following table presents the reconciliation of our revenues from contracts with customers (as described above for each segment) to segment revenues and total revenues as disclosed in our Consolidated Statement of Operations (in millions):

Year Ended December 31, 2018
 
Transportation
 
Facilities
 
Supply and
Logistics
 
Total
Revenues from contracts with customers
 
$
1,976

 
$
1,136

 
$
32,700

 
$
35,812

Other items in revenues
 
14

 
25

 
122

 
161

Total revenues of reportable segments
 
$
1,990

 
$
1,161

 
$
32,822

 
$
35,973

Intersegment revenues
 
 
 
 
 
 
 
(1,918
)
Total revenues
 
 
 
 
 
 
 
$
34,055

Contracts with Customers, Assets and Liabilities
The following is a reconciliation of trade accounts receivable from revenues from contracts with customers to total Trade accounts receivable and other receivables, net as presented on our Consolidated Balance Sheet (in millions):
 
December 31,
 
2018
 
2017
Trade accounts receivable arising from revenues from contracts with customers
$
2,277

 
$
2,584

Other trade accounts receivables and other receivables (1)
2,732

 
3,709

Impact due to contractual rights of offset with counterparties
(2,555
)
 
(3,264
)
Trade accounts receivable and other receivables, net
$
2,454

 
$
3,029

 
(1) 
The balance is comprised primarily of accounts receivable associated with buy/sell arrangements that are not within the scope of Topic 606.

The following table presents the change in the contract liability balance during the year ended December 31, 2018 (in millions):
 
 
Contract Liabilities
Balance at December 31, 2017
 
$
90

Amounts recognized as revenue
 
(81
)
Additions (1) (2)
 
332

Other
 
(3
)
Balance at December 31, 2018
 
$
338

 
(1) 
Includes approximately $116 million associated with crude oil sales agreements that are entered into in conjunction with storage arrangements and future inventory exchanges. Such amount is expected to be recognized as revenue in the first quarter of 2019.
(2) 
Includes $100 million associated with long-term capacity agreements with Cactus II Pipeline LLC. See Note 9 for additional information.
Remaining Performance Obligations
The following table presents the amount of consideration associated with remaining performance obligations for the population of contracts with external customers meeting the presentation requirements as of December 31, 2018 (in millions):

 
2019
 
2020
 
2021
 
2022
 
2023
 
2024 and Thereafter
Pipeline revenues supported by minimum volume commitments and long-term capacity agreements (1)
$
157

 
$
198

 
$
189

 
$
188

 
$
188

 
$
635

Long-term storage, terminalling and throughput agreement revenues
389

 
312

 
225

 
168

 
132

 
436

Total
$
546

 
$
510

 
$
414

 
$
356

 
$
320

 
$
1,071

 
(1) 
Includes revenues from certain contracts for which the amount and timing of revenue is subject to the completion of underlying construction projects.     

Supply and Logistics  
Disaggregation of Revenue [Line Items]  
Disaggregation of Revenue
The following table presents our Supply and Logistics segment revenues from contracts with customers disaggregated by type of activity (in millions):

 
 
Year Ended December 31, 2018
Supply and Logistics segment revenues from contracts with customers
 
 
Crude oil transactions
 
$
29,592

NGL and other transactions
 
3,108

Total Supply and Logistics segment revenues from contracts with customers
 
$
32,700

Transportation  
Disaggregation of Revenue [Line Items]  
Disaggregation of Revenue
The following table presents our Transportation segment revenues from contracts with customers disaggregated by type of activity (in millions):

 
 
Year Ended December 31, 2018
Transportation segment revenues from contracts with customers
 
 
Tariff activities:
 
 
Crude oil pipelines
 
$
1,724

NGL pipelines
 
103

Total tariff activities
 
1,827

Trucking
 
149

Total Transportation segment revenues from contracts with customers
 
$
1,976

Facilities  
Disaggregation of Revenue [Line Items]  
Disaggregation of Revenue
The following table presents our Facilities segment revenues from contracts with customers disaggregated by type of activity (in millions):

 
 
Year Ended December 31, 2018
Facilities segment revenues from contracts with customers
 
 
Crude oil, NGL and other terminalling and storage
 
$
688

NGL and natural gas processing and fractionation
 
364

Rail load / unload
 
84

Total Facilities segment revenues from contracts with customers
 
$
1,136