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Business Segments and Related Information - Schedule of Segment Financial Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Segment revenues: |  |  |  |
Revenues | $ 12,023 | $ 13,775 | $ 38,803 | $ 42,018
Significant segment expenses: |  |  |  |
Cost of sales | 8,590 | 10,387 | 28,494 | 31,976
Other segment income (expense): |  |  |  |
Equity in income of unconsolidated affiliates | 90 | 99 | 276 | 302
NGL Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 3,465 | 4,831 | 12,271 | 14,236
Other segment income (expense): |  |  |  |
Equity in income of unconsolidated affiliates | 21 | 27 | 59 | 84
Crude Oil Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 5,396 | 5,251 | 15,300 | 16,554
Other segment income (expense): |  |  |  |
Equity in income of unconsolidated affiliates | 68 | 70 | 212 | 212
Natural Gas Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 932 | 649 | 3,224 | 2,115
Other segment income (expense): |  |  |  |
Equity in income of unconsolidated affiliates | 2 | 2 | 4 | 5
Petrochemical & Refined Products Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 2,230 | 3,044 | 8,008 | 9,113
Other segment income (expense): |  |  |  |
Equity in income of unconsolidated affiliates | (1) | 0 | 1 | 1
Nonrelated Party |  |  |  |
Segment revenues: |  |  |  |
Revenues | 12,009 | 13,759 | 38,765 | 41,976
Related parties |  |  |  |
Segment revenues: |  |  |  |
Revenues | 14 | 16 | 38 | 42
Operating Segments |  |  |  |
Segment revenues: |  |  |  |
Revenues | 45,364 | 45,607 | 139,537 | 138,185
Significant segment expenses: |  |  |  |
Cost of sales | 41,643 | 41,969 | 128,388 | 127,364
Variable operating costs and expenses | 394 | 322 | 1,121 | 953
Fixed operating costs and expenses | 1,048 | 961 | 3,051 | 2,812
Total significant segment expenses | 43,085 | 43,252 | 132,560 | 131,129
Other segment income (expense): |  |  |  |
Equity in income of unconsolidated affiliates | 90 | 99 | 276 | 302
Other segment items | 14 | (6) | 65 | 24
Total other segment income (expense), net | 104 | 93 | 341 | 326
Total segment gross operating margin | 2,383 | 2,448 | 7,318 | 7,382
Other financial information: |  |  |  |
Capital expenditures | 1,958 | 1,174 | 4,319 | 3,485
Operating Segments | NGL Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 21,048 | 15,875 | 63,875 | 48,393
Significant segment expenses: |  |  |  |
Cost of sales | 19,093 | 13,946 | 58,013 | 42,713
Variable operating costs and expenses | 219 | 190 | 622 | 531
Fixed operating costs and expenses | 456 | 425 | 1,321 | 1,254
Total significant segment expenses | 19,768 | 14,561 | 59,956 | 44,498
Other segment income (expense): |  |  |  |
Equity in income of unconsolidated affiliates | 21 | 27 | 59 | 84
Other segment items | 2 | (6) | 40 | 21
Total other segment income (expense), net | 23 | 21 | 99 | 105
Total segment gross operating margin | 1,303 | 1,335 | 4,018 | 4,000
Other financial information: |  |  |  |
Capital expenditures | 1,097 | 629 | 2,557 | 1,835
Operating Segments | Crude Oil Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 16,900 | 18,929 | 46,750 | 59,101
Significant segment expenses: |  |  |  |
Cost of sales | 16,450 | 18,463 | 45,417 | 57,679
Variable operating costs and expenses | 36 | 30 | 105 | 102
Fixed operating costs and expenses | 116 | 103 | 305 | 310
Total significant segment expenses | 16,602 | 18,596 | 45,827 | 58,091
Other segment income (expense): |  |  |  |
Equity in income of unconsolidated affiliates | 68 | 70 | 212 | 212
Other segment items | 5 | (2) | 13 | 7
Total other segment income (expense), net | 73 | 68 | 225 | 219
Total segment gross operating margin | 371 | 401 | 1,148 | 1,229
Other financial information: |  |  |  |
Capital expenditures | 35 | 52 | 83 | 133
Operating Segments | Natural Gas Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 1,167 | 815 | 3,893 | 2,596
Significant segment expenses: |  |  |  |
Cost of sales | 616 | 279 | 2,159 | 1,106
Variable operating costs and expenses | 21 | 15 | 63 | 54
Fixed operating costs and expenses | 194 | 174 | 566 | 492
Total significant segment expenses | 831 | 468 | 2,788 | 1,652
Other segment income (expense): |  |  |  |
Equity in income of unconsolidated affiliates | 2 | 2 | 4 | 5
Other segment items | 1 | 0 | 4 | 5
Total other segment income (expense), net | 3 | 2 | 8 | 10
Total segment gross operating margin | 339 | 349 | 1,113 | 954
Other financial information: |  |  |  |
Capital expenditures | 674 | 246 | 1,304 | 696
Operating Segments | Petrochemical & Refined Products Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 6,249 | 9,988 | 25,019 | 28,095
Significant segment expenses: |  |  |  |
Cost of sales | 5,484 | 9,281 | 22,799 | 25,866
Variable operating costs and expenses | 118 | 87 | 331 | 266
Fixed operating costs and expenses | 282 | 259 | 859 | 756
Total significant segment expenses | 5,884 | 9,627 | 23,989 | 26,888
Other segment income (expense): |  |  |  |
Equity in income of unconsolidated affiliates | (1) | 0 | 1 | 1
Other segment items | 6 | 2 | 8 | (9)
Total other segment income (expense), net | 5 | 2 | 9 | (8)
Total segment gross operating margin | 370 | 363 | 1,039 | 1,199
Other financial information: |  |  |  |
Capital expenditures | 152 | 247 | 375 | 821
Operating Segments | Nonrelated Party |  |  |  |
Segment revenues: |  |  |  |
Revenues | 12,009 | 13,759 | 38,765 | 41,976
Operating Segments | Nonrelated Party | NGL Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 3,463 | 4,828 | 12,265 | 14,227
Operating Segments | Nonrelated Party | Crude Oil Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 5,389 | 5,241 | 15,281 | 16,530
Operating Segments | Nonrelated Party | Natural Gas Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 927 | 646 | 3,211 | 2,106
Operating Segments | Nonrelated Party | Petrochemical & Refined Products Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 2,230 | 3,044 | 8,008 | 9,113
Operating Segments | Related parties |  |  |  |
Segment revenues: |  |  |  |
Revenues | 14 | 16 | 38 | 42
Operating Segments | Related parties | NGL Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 2 | 3 | 6 | 9
Operating Segments | Related parties | Crude Oil Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 7 | 10 | 19 | 24
Operating Segments | Related parties | Natural Gas Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 5 | 3 | 13 | 9
Operating Segments | Related parties | Petrochemical & Refined Products Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | 0 | 0 | 0 | 0
Intersegment Eliminations |  |  |  |
Segment revenues: |  |  |  |
Revenues | (33,341) | (31,832) | (100,734) | (96,167)
Intersegment Eliminations | NGL Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | (17,583) | (11,044) | (51,604) | (34,157)
Intersegment Eliminations | Crude Oil Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | (11,504) | (13,678) | (31,450) | (42,547)
Intersegment Eliminations | Natural Gas Pipelines & Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | (235) | (166) | (669) | (481)
Intersegment Eliminations | Petrochemical & Refined Products Services |  |  |  |
Segment revenues: |  |  |  |
Revenues | $ (4,019) | $ (6,944) | $ (17,011) | $ (18,982)

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