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Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | $ 13,483 | $ 13,647 | $ 18,128
Leasing services(d) | 1,400 | 1,368 | 1,302
Derivatives adjustments on commodity sales | 27 | 178 | (354)
Other | 190 | 141 | 124
Total other revenues | 1,617 | 1,687 | 1,072
Total revenues | 15,100 | 15,334 | 19,200
Firm services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 4,957 | 4,537 | 4,515
Fee-based services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 2,597 | 2,502 | 2,360
Total services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 7,554 | 7,039 | 6,875
Natural gas sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 2,340 | 2,666 | 6,260
Product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 3,486 | 3,884 | 4,913
Other sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 103 | 58 | 80
Total commodity sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 5,929 | 6,608 | 11,253
Total revenues | 5,957 | 6,786 | 10,897
Natural Gas Pipelines |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 8,930 | 9,152 | 12,659
Products Pipelines |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 2,955 | 3,066 | 3,418
Terminals |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 2,013 | 1,911 | 1,789
CO2 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 1,202 | 1,205 | 1,334
Operating Segments | Natural Gas Pipelines |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 8,225 | 8,312 | 12,172
Leasing services(d) | 459 | 475 | 474
Derivatives adjustments on commodity sales | 113 | 285 | (26)
Other | 145 | 96 | 66
Total other revenues | 717 | 856 | 514
Total revenues | 8,942 | 9,168 | 12,686
Operating Segments | Natural Gas Pipelines | Firm services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 3,893 | 3,543 | 3,547
Operating Segments | Natural Gas Pipelines | Fee-based services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,044 | 1,008 | 926
Operating Segments | Natural Gas Pipelines | Total services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 4,937 | 4,551 | 4,473
Operating Segments | Natural Gas Pipelines | Natural gas sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 2,303 | 2,631 | 6,198
Operating Segments | Natural Gas Pipelines | Product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 965 | 1,110 | 1,433
Operating Segments | Natural Gas Pipelines | Other sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 20 | 20 | 68
Operating Segments | Natural Gas Pipelines | Total commodity sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 3,288 | 3,761 | 7,699
Operating Segments | Products Pipelines |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 2,723 | 2,842 | 3,201
Leasing services(d) | 209 | 200 | 194
Derivatives adjustments on commodity sales | (1) | 0 | (3)
Other | 24 | 24 | 26
Total other revenues | 232 | 224 | 217
Total revenues | 2,955 | 3,066 | 3,418
Operating Segments | Products Pipelines | Firm services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 220 | 171 | 207
Operating Segments | Products Pipelines | Fee-based services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,059 | 1,036 | 962
Operating Segments | Products Pipelines | Total services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,279 | 1,207 | 1,169
Operating Segments | Products Pipelines | Natural gas sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Products Pipelines | Product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,444 | 1,635 | 2,032
Operating Segments | Products Pipelines | Other sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Products Pipelines | Total commodity sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,444 | 1,635 | 2,032
Operating Segments | Terminals |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,356 | 1,279 | 1,218
Leasing services(d) | 666 | 638 | 574
Derivatives adjustments on commodity sales | 0 | 0 | 0
Other | 0 | 0 | 0
Total other revenues | 666 | 638 | 574
Total revenues | 2,022 | 1,917 | 1,792
Operating Segments | Terminals | Firm services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 846 | 819 | 763
Operating Segments | Terminals | Fee-based services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 460 | 427 | 426
Operating Segments | Terminals | Total services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,306 | 1,246 | 1,189
Operating Segments | Terminals | Natural gas sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Terminals | Product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 50 | 33 | 29
Operating Segments | Terminals | Other sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Terminals | Total commodity sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 50 | 33 | 29
Operating Segments | CO2 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,202 | 1,240 | 1,567
Leasing services(d) | 66 | 55 | 60
Derivatives adjustments on commodity sales | (85) | (107) | (325)
Other | 21 | 21 | 32
Total other revenues | 2 | (31) | (233)
Total revenues | 1,204 | 1,209 | 1,334
Operating Segments | CO2 | Firm services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 2 | 1 | 1
Operating Segments | CO2 | Fee-based services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 41 | 40 | 46
Operating Segments | CO2 | Total services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 43 | 41 | 47
Operating Segments | CO2 | Natural gas sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 43 | 43 | 82
Operating Segments | CO2 | Product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,031 | 1,114 | 1,426
Operating Segments | CO2 | Other sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 85 | 42 | 12
Operating Segments | CO2 | Total commodity sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,159 | 1,199 | 1,520
Corporate and Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | (23) | (26) | (30)
Leasing services(d) | 0 | 0 | 0
Derivatives adjustments on commodity sales | 0 | 0 | 0
Other | 0 | 0 | 0
Total other revenues | 0 | 0 | 0
Total revenues | (23) | (26) | (30)
Corporate and Eliminations | Firm services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | (4) | 3 | (3)
Corporate and Eliminations | Fee-based services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | (7) | (9) | 0
Corporate and Eliminations | Total services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | (11) | (6) | (3)
Corporate and Eliminations | Natural gas sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | (6) | (8) | (20)
Corporate and Eliminations | Product sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | (4) | (8) | (7)
Corporate and Eliminations | Other sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | (2) | (4) | 0
Corporate and Eliminations | Total commodity sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | $ (12) | $ (20) | $ (27)

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