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Reportable Segments
 6 Months Ended
Jun. 30, 2021
Segment Reporting [Abstract]  
Reportable Segments
Our reportable segments, which conduct their business primarily in the United States, are as follows:
•intrastate transportation and storage;
•interstate transportation and storage;
•midstream;
•NGL and refined products transportation and services;
•crude oil transportation and services;
•investment in Sunoco LP;
•investment in USAC; and
•all other.
Consolidated revenues and expenses reflect the elimination of all material intercompany transactions.
Revenues from our intrastate transportation and storage segment are primarily reflected in natural gas sales and gathering, transportation and other fees. Revenues from our interstate transportation and storage segment are primarily reflected in gathering, transportation and other fees. Revenues from our midstream segment are primarily reflected in natural gas sales, NGL sales and gathering, transportation and other fees. Revenues from our NGL and refined products transportation and services segment are primarily reflected in NGL sales and gathering, transportation and other fees. Revenues from our crude oil transportation and services segment are primarily reflected in crude sales. Revenues from our investment in Sunoco LP segment are primarily reflected in refined product sales. Revenues from our investment in USAC segment are primarily reflected in gathering, transportation and other fees. Revenues from our all other segment are primarily reflected in natural gas sales and gathering, transportation and other fees.
We report Segment Adjusted EBITDA and consolidated Adjusted EBITDA as measures of segment performance. We define Segment Adjusted EBITDA and consolidated Adjusted EBITDA as total partnership earnings before interest, taxes, depreciation, depletion, amortization and other non-cash items, such as non-cash compensation expense, gains and losses on disposals of assets, the allowance for equity funds used during construction, unrealized gains and losses on commodity risk management activities, inventory valuation adjustments, non-cash impairment charges, losses on extinguishments of debt and other non-operating income or expense items. Inventory adjustments that are excluded from the calculation of Adjusted EBITDA represent only the changes in lower of cost or market reserves on inventory that is carried at LIFO. These amounts are unrealized valuation adjustments applied to Sunoco LP’s fuel volumes remaining in inventory at the end of the period.
Segment Adjusted EBITDA and consolidated Adjusted EBITDA reflect amounts for unconsolidated affiliates based on the same recognition and measurement methods used to record equity in earnings of unconsolidated affiliates. Adjusted EBITDA related to unconsolidated affiliates excludes the same items with respect to the unconsolidated affiliate as those excluded from the calculation of Segment Adjusted EBITDA and consolidated Adjusted EBITDA, such as interest, taxes, depreciation, depletion, amortization and other non-cash items. Although these amounts are excluded from Adjusted EBITDA related to unconsolidated affiliates, such exclusion should not be understood to imply that we have control over the operations and resulting revenues and expenses of such affiliates. We do not control our unconsolidated affiliates; therefore, we do not control the earnings or cash flows of such affiliates. The use of Segment Adjusted EBITDA or Adjusted EBITDA related to unconsolidated affiliates as an analytical tool should be limited accordingly.
The following tables present financial information by segment:
Three Months Ended
June 30,		Six Months Ended
June 30,
2021202020212020
Revenues:
Intrastate transportation and storage:
Revenues from external customers
$852 $465 $4,828 $1,001 
Intersegment revenues
97 51 1,021 108 
949 516 5,849 1,109 
Interstate transportation and storage:
Revenues from external customers
404 440 905 899 
Intersegment revenues
3 5 27 10 
407 445 932 909 
Midstream:
Revenues from external customers
571 391 1,149 892 
Intersegment revenues
1,628 627 3,722 1,296 
2,199 1,018 4,871 2,188 
NGL and refined products transportation and services:
Revenues from external customers
3,830 1,666 7,227 3,784 
Intersegment revenues
692 453 1,285 1,050 
4,522 2,119 8,512 4,834 
Crude oil transportation and services:
Revenues from external customers
4,420 1,811 7,920 6,024 
Intersegment revenues
— 3 — 3 
4,420 1,814 7,920 6,027 
Investment in Sunoco LP:
Revenues from external customers
4,385 2,043 7,854 5,303 
Intersegment revenues
7 37 9 49 
4,392 2,080 7,863 5,352 
Investment in USAC:
Revenues from external customers
153 166 308 342 
Intersegment revenues
3 3 6 6 
156 169 314 348 
All other:
Revenues from external customers
486 356 1,905 720 
Intersegment revenues
90 136 183 285 
576 492 2,088 1,005 
Eliminations
(2,520)(1,315)(6,253)(2,807)
Total revenues
$15,101 $7,338 $32,096 $18,965 
Three Months Ended
June 30,		Six Months Ended
June 30,
2021202020212020
Segment Adjusted EBITDA:
Intrastate transportation and storage
$224 $187 $3,037 $427 
Interstate transportation and storage
331 403 784 807 
Midstream
477 367 765 750 
NGL and refined products transportation and services
736 674 1,383 1,337 
Crude oil transportation and services
484 519 994 1,110 
Investment in Sunoco LP
201 182 358 391 
Investment in USAC
100 105 200 211 
All other
63 1 135 40 
Adjusted EBITDA (consolidated)
2,616 2,438 7,656 5,073 
Depreciation, depletion and amortization
(940)(936)(1,894)(1,803)
Interest expense, net of interest capitalized
(566)(579)(1,155)(1,181)
Impairment losses(8)(4)(11)(1,329)
Gains (losses) on interest rate derivatives(123)(3)71 (332)
Non-cash compensation expense
(27)(41)(55)(63)
Unrealized gains (losses) on commodity risk management activities47 (48)93 3 
Inventory valuation adjustments (Sunoco LP)59 90 159 (137)
Losses on extinguishments of debt
(1)— (8)(62)
Adjusted EBITDA related to unconsolidated affiliates
(136)(157)(259)(311)
Equity in earnings of unconsolidated affiliates65 85 120 78 
Other, net
4 (74)(11)(101)
Income (loss) before income tax expense990 771 4,706 (165)
Income tax expense(82)(99)(157)(127)
Net income (loss)$908 $672 $4,549 $(292)