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Reportable Segments Operating expenses (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |
Operating expenses | $ 8,166 | $ 12,351 | $ 9,287
Operating Segments | Natural Gas Pipelines |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating expenses | 4,700 | 8,562 | 7,000
Operating Segments | Products Pipelines |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating expenses | 2,024 | 2,391 | 1,239
Operating Segments | Terminals |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating expenses | 896 | 853 | 793
Operating Segments | CO2 |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating expenses | 550 | 554 | 289
Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating expenses | $ (4) | $ (9) | $ (34)

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