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Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 12 Months Ended
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)