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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2025
Segment Reporting [Abstract] |
Schedule of Segment Reporting Information, by Segment [Table Text Block] | The tables below present information about our reportable segments:
(In millions) |  | 2025 |  | 2024 |  | 2023
Crude Oil and Products Logistics |  |  |  |  |  |
Service revenue |  | $ | 4,824 |  |  | $ | 4,543 |  |  | $ | 4,335 |
Rental income |  | 923 |  |  | 882 |  |  | 857 |
Product related revenue |  | 16 |  |  | 18 |  |  | 18 |
Sales-type lease revenue |  | 448 |  |  | 475 |  |  | 500 |
Income from equity method investments |  | 243 |  |  | 269 |  |  | 270 |
Other income |  | 121 |  |  | 152 |  |  | 68 |
Total segment revenues and other income(1) |  | 6,575 |  |  | 6,339 |  |  | 6,048 |
Operating expenses |  | 2,173 |  |  | 2,097 |  |  | 2,006 |
Other segment items(2) |  | (145) |  |  | (133) |  |  | (92) |
Segment Adjusted EBITDA(3) |  | 4,547 |  |  | 4,375 |  |  | 4,134 |
Capital expenditures |  | 538 |  |  | 482 |  |  | 414 |
Investments in unconsolidated affiliates(4) |  | — |  |  | 93 |  |  | 8 |
Natural Gas and NGL Services |  |  |  |  |  |
Service revenue |  | 2,468 |  |  | 2,407 |  |  | 2,189 |
Rental income |  | 226 |  |  | 222 |  |  | 208 |
Product related revenue |  | 2,418 |  |  | 2,221 |  |  | 2,191 |
Sales-type lease revenue |  | 151 |  |  | 136 |  |  | 136 |
Income from equity method investments(5) |  | 454 |  |  | 533 |  |  | 330 |
Gain on equity method investments(6) |  | 484 |  |  | 20 |  |  | 92 |
Other income |  | 222 |  |  | 55 |  |  | 87 |
Total segment revenues and other income(1) |  | 6,423 |  |  | 5,594 |  |  | 5,233 |
Purchased product costs |  | 1,815 |  |  | 1,561 |  |  | 1,598 |
Operating expenses |  | 1,716 |  |  | 1,704 |  |  | 1,564 |
Other segment items(2) |  | 422 |  |  | (60) |  |  | (64) |
Segment Adjusted EBITDA(3) |  | 2,470 |  |  | 2,389 |  |  | 2,135 |
Capital expenditures |  | 1,418 |  |  | 568 |  |  | 605 |
Investments in unconsolidated affiliates(4) |  | $ | 794 |  |  | $ | 143 |  |  | $ | 90 |
(1) Within the total segment revenues and other income amounts presented above, third-party revenues for the Crude Oil and Products Logistics segment were $751 million, $746 million and $701 million for the years ended December 31, 2025, 2024 and 2023, respectively. Third-party revenues for the Natural Gas and NGL Services segment were $6,210 million, $5,297 million and $4,902 million for the years ended December 31, 2025, 2024 and 2023, respectively. (2) Other segment items in the Crude Oil and Products Logistics segment include income from equity method investments, distributions and adjustments related to equity method investments, equity-based compensation and other miscellaneous items. Other segment items in the Natural Gas and NGL Services segment include income from and gain on equity method investments, distributions and adjustments related to equity method investments, gain on sale of assets, transaction-related costs, unrealized derivative gain/loss and other miscellaneous items. (3) See below for the reconciliation from Segment Adjusted EBITDA to Net income. (4) Investments in unconsolidated affiliates in the Crude Oil and Products Logistics segment includes a contribution of $92 million in 2024 to Dakota Access to fund our share of a debt repayment by the joint venture and excludes $18 million in 2024 related to acquisition of an additional interest in Wink to Webster Pipeline LLC. Investments in unconsolidated affiliates in the Natural Gas and NGL Services segment includes cash contributions to several joint ventures to fund current growth capital projects in 2025 and excludes $151 million in 2025 related to acquisition of an additional interest in the joint venture that owns and operates the Matterhorn Express Pipeline, a $49 million capital contribution in 2025 to WPC Parent, LLC to purchase Enbridge’s special membership interest in the Rio Bravo Pipeline project, a $13 million payment in 2025 related to earnout associated with MXP Parent, LLC, and $210 million in 2024 related to the acquisition of additional interests in BANGL, LLC. (5) Includes a $151 million gain related to the dilution of ownership interest in connection with the Whistler Joint Venture Transaction in 2024. (6) Gain on equity method investments represents the gain on remeasurement of our existing equity method investment in BANGL in conjunction with the BANGL Acquisition in 2025, the gain on remeasurement of our existing equity method investment in OCC in conjunction with the Utica Midstream Acquisition in 2024, and the gain on remeasurement of our existing equity method investment in Torñado in conjunction with the purchase of the remaining joint venture interest in 2023.
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table Text Block] | The table below provides a reconciliation of Segment Adjusted EBITDA for reportable segments to Net income.
(In millions) | 2025 |  | 2024 |  | 2023
Reconciliation to Net income: |  |  |  |  |
Crude Oil and Products Logistics Segment Adjusted EBITDA | $ | 4,547 |  |  | $ | 4,375 |  |  | $ | 4,134 |
Natural Gas and NGL Services Segment Adjusted EBITDA | 2,470 |  |  | 2,389 |  |  | 2,135 |
Total reportable segments | 7,017 |  |  | 6,764 |  |  | 6,269 |
Depreciation and amortization(1) | (1,351) |  |  | (1,283) |  |  | (1,213) |
Net interest and other financial costs | (983) |  |  | (921) |  |  | (923) |
Income from equity method investments | 697 |  |  | 802 |  |  | 600 |
Distributions/adjustments related to equity method investments | (962) |  |  | (928) |  |  | (774) |
Gain on equity method investments | 484 |  |  | — |  |  | 92 |
Gain on sale of assets | 159 |  |  | — |  |  | — |
Transaction-related costs(2) | (33) |  |  | — |  |  | — |
Adjusted EBITDA attributable to noncontrolling interests | 44 |  |  | 44 |  |  | 42 |
Garyville incident response costs(3) | — |  |  | — |  |  | (16) |
Other(4) | (120) |  |  | (121) |  |  | (111) |
Net income | $ | 4,952 |  |  | $ | 4,357 |  |  | $ | 3,966 |
(1) Depreciation and amortization attributable to Crude Oil and Products Logistics was $546 million, $526 million and $530 million for the years ended December 31, 2025, 2024 and 2023, respectively. Depreciation and amortization attributable to Natural Gas and NGL Services was $805 million, $757 million and $683 million for the years ended December 31, 2025, 2024 and 2023, respectively. (2) Transaction-related costs include costs associated with the Northwind Midstream Acquisition, the BANGL Acquisition and the divestiture of the Rockies gathering and processing operations discussed in Note 4. (3) In August 2023, a naphtha release and resulting fire occurred at our Garyville Tank Farm resulting in the loss of four storage tanks with a combined shell capacity of 894 thousand barrels. We incurred $16 million of incident response costs, net of insurance recoveries, during the year ended December 31, 2023. (4) Includes unrealized derivative gain/(loss), equity-based compensation, provision for income taxes and other miscellaneous items.

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- Definition Tabular disclosure of reconciliation of other items from reportable segments to their consolidated amount. Excludes reconciliation of revenue, profit (loss), and assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-31 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-25 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 + Details
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