v3.26.3
Revenue Recognition - Disaggregation of Revenue (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Disaggregation of Revenue [Line Items]        
Revenues from customers $ 4,185 $ 3,723 $ 12,734 $ 11,191
Leasing services 365 365 1,095 1,099
Derivatives adjustments on commodity sales (62) 23 (115) 33
Other 43 35 122 106
Total other revenues 346 423 1,102 1,238
Total revenues 4,531 4,146 $ 13,836 12,429
Number of Reportable Segments     4  
Natural Gas Pipelines        
Disaggregation of Revenue [Line Items]        
Total revenues 2,894 2,672 $ 8,849 7,953
Products Pipelines        
Disaggregation of Revenue [Line Items]        
Total revenues 772 677 2,361 2,031
Terminals        
Disaggregation of Revenue [Line Items]        
Total revenues 560 516 1,678 1,563
CO2        
Disaggregation of Revenue [Line Items]        
Total revenues 305 281 948 882
Operating Segments | Natural Gas Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 2,758 2,517 8,411 7,527
Leasing services 112 115 334 340
Derivatives adjustments on commodity sales (2) 18 34 24
Other 31 26 87 75
Total other revenues 141 159 455 439
Total revenues 2,899 2,676 8,866 7,966
Operating Segments | Products Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 725 625 2,214 1,866
Leasing services 41 46 128 146
Derivatives adjustments on commodity sales 0 0 (1) 0
Other 6 6 20 19
Total other revenues 47 52 147 165
Total revenues 772 677 2,361 2,031
Operating Segments | Terminals        
Disaggregation of Revenue [Line Items]        
Revenues from customers 367 332 1,099 1,009
Leasing services 195 186 586 560
Derivatives adjustments on commodity sales 0 0 0 0
Other 0 0 0 0
Total other revenues 195 186 586 560
Total revenues 562 518 1,685 1,569
Operating Segments | CO2        
Disaggregation of Revenue [Line Items]        
Revenues from customers 344 256 1,036 810
Leasing services 17 18 47 53
Derivatives adjustments on commodity sales (60) 5 (148) 9
Other 6 3 15 12
Total other revenues (37) 26 (86) 74
Total revenues 307 282 950 884
Corporate and Eliminations        
Disaggregation of Revenue [Line Items]        
Revenues from customers (9) (7) (26) (21)
Leasing services 0 0 0 0
Derivatives adjustments on commodity sales 0 0 0 0
Other 0 0 0 0
Total other revenues 0 0 0 0
Total revenues (9) (7) (26) (21)
Corporate and Eliminations | Natural Gas Pipelines        
Disaggregation of Revenue [Line Items]        
Total revenues (5) (4) (17) (13)
Corporate and Eliminations | Products Pipelines        
Disaggregation of Revenue [Line Items]        
Total revenues 0 0 0 0
Corporate and Eliminations | Terminals        
Disaggregation of Revenue [Line Items]        
Total revenues (2) (2) (7) (6)
Corporate and Eliminations | CO2        
Disaggregation of Revenue [Line Items]        
Total revenues (2) (1) (2) (2)
Firm services        
Disaggregation of Revenue [Line Items]        
Revenues from customers 1,383 1,304 4,208 3,939
Firm services | Operating Segments | Natural Gas Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 1,088 1,037 3,313 3,128
Firm services | Operating Segments | Products Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 68 51 192 151
Firm services | Operating Segments | Terminals        
Disaggregation of Revenue [Line Items]        
Revenues from customers 228 217 705 662
Firm services | Operating Segments | CO2        
Disaggregation of Revenue [Line Items]        
Revenues from customers 0 0 1 1
Firm services | Corporate and Eliminations        
Disaggregation of Revenue [Line Items]        
Revenues from customers (1) (1) (3) (3)
Fee-based services        
Disaggregation of Revenue [Line Items]        
Revenues from customers 750 681 2,189 2,015
Fee-based services | Operating Segments | Natural Gas Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 363 282 1,036 864
Fee-based services | Operating Segments | Products Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 261 282 797 817
Fee-based services | Operating Segments | Terminals        
Disaggregation of Revenue [Line Items]        
Revenues from customers 115 106 324 306
Fee-based services | Operating Segments | CO2        
Disaggregation of Revenue [Line Items]        
Revenues from customers 13 12 38 32
Fee-based services | Corporate and Eliminations        
Disaggregation of Revenue [Line Items]        
Revenues from customers (2) (1) (6) (4)
Total services        
Disaggregation of Revenue [Line Items]        
Revenues from customers 2,133 1,985 6,397 5,954
Total services | Operating Segments | Natural Gas Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 1,451 1,319 4,349 3,992
Total services | Operating Segments | Products Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 329 333 989 968
Total services | Operating Segments | Terminals        
Disaggregation of Revenue [Line Items]        
Revenues from customers 343 323 1,029 968
Total services | Operating Segments | CO2        
Disaggregation of Revenue [Line Items]        
Revenues from customers 13 12 39 33
Total services | Corporate and Eliminations        
Disaggregation of Revenue [Line Items]        
Revenues from customers (3) (2) (9) (7)
Natural gas sales        
Disaggregation of Revenue [Line Items]        
Revenues from customers 999 960 3,259 2,833
Natural gas sales | Operating Segments | Natural Gas Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 993 952 3,229 2,802
Natural gas sales | Operating Segments | Products Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 0 0 0 0
Natural gas sales | Operating Segments | Terminals        
Disaggregation of Revenue [Line Items]        
Revenues from customers 0 0 0 0
Natural gas sales | Operating Segments | CO2        
Disaggregation of Revenue [Line Items]        
Revenues from customers 9 10 36 37
Natural gas sales | Corporate and Eliminations        
Disaggregation of Revenue [Line Items]        
Revenues from customers (3) (2) (6) (6)
Product sales        
Disaggregation of Revenue [Line Items]        
Revenues from customers 1,015 748 2,963 2,308
Product sales | Operating Segments | Natural Gas Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 306 239 808 712
Product sales | Operating Segments | Products Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 396 292 1,225 898
Product sales | Operating Segments | Terminals        
Disaggregation of Revenue [Line Items]        
Revenues from customers 24 9 70 41
Product sales | Operating Segments | CO2        
Disaggregation of Revenue [Line Items]        
Revenues from customers 290 210 869 663
Product sales | Corporate and Eliminations        
Disaggregation of Revenue [Line Items]        
Revenues from customers (1) (2) (9) (6)
Other sales        
Disaggregation of Revenue [Line Items]        
Revenues from customers 38 30 115 96
Other sales | Operating Segments | Natural Gas Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 8 7 25 21
Other sales | Operating Segments | Products Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 0 0 0 0
Other sales | Operating Segments | Terminals        
Disaggregation of Revenue [Line Items]        
Revenues from customers 0 0 0 0
Other sales | Operating Segments | CO2        
Disaggregation of Revenue [Line Items]        
Revenues from customers 32 24 92 77
Other sales | Corporate and Eliminations        
Disaggregation of Revenue [Line Items]        
Revenues from customers (2) (1) (2) (2)
Total commodity sales        
Disaggregation of Revenue [Line Items]        
Revenues from customers 2,052 1,738 6,337 5,237
Total revenues 1,989 1,758 6,212 5,262
Total commodity sales | Operating Segments | Natural Gas Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 1,307 1,198 4,062 3,535
Total commodity sales | Operating Segments | Products Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues from customers 396 292 1,225 898
Total commodity sales | Operating Segments | Terminals        
Disaggregation of Revenue [Line Items]        
Revenues from customers 24 9 70 41
Total commodity sales | Operating Segments | CO2        
Disaggregation of Revenue [Line Items]        
Revenues from customers 331 244 997 777
Total commodity sales | Corporate and Eliminations        
Disaggregation of Revenue [Line Items]        
Revenues from customers $ (6) $ (5) $ (17) $ (14)