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Revenue Recognition Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | $ 2,154 | $ 2,971 | $ 4,840 | $ 6,143
Leasing services | 299 | 216 | 593 | 434
Derivatives adjustments on commodity sales | 64 | 7 | 168 | 30
Other | 43 | 20 | 65 | 36
Total other revenues | 406 | 243 | 826 | 500
Total revenues | 2,560 | 3,214 | 5,666 | 6,643
Natural Gas Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,565 | 1,956 | 3,426 | 4,148
Products Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 345 | 442 | 840 | 866
Terminals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 418 | 506 | 859 | 1,014
CO2 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 232 | 310 | 541 | 615
Operating Segments | Natural Gas Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 1,432 | 1,880 | 3,127 | 3,996
Leasing services | 114 | 55 | 227 | 110
Derivatives adjustments on commodity sales | (11) | 19 | 41 | 38
Other | 36 | 14 | 51 | 25
Total other revenues | 139 | 88 | 319 | 173
Total revenues | 1,571 | 1,968 | 3,446 | 4,169
Operating Segments | Products Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 298 | 397 | 746 | 778
Leasing services | 42 | 43 | 84 | 84
Derivatives adjustments on commodity sales | 0 | 0 | 0 | 0
Other | 5 | 2 | 10 | 4
Total other revenues | 47 | 45 | 94 | 88
Total revenues | 345 | 442 | 840 | 866
Operating Segments | Terminals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 287 | 402 | 600 | 802
Leasing services | 132 | 105 | 261 | 214
Derivatives adjustments on commodity sales | 0 | 0 | 0 | 0
Other | 0 | 0 | 0 | 0
Total other revenues | 132 | 105 | 261 | 214
Total revenues | 419 | 507 | 861 | 1,016
Operating Segments | CO2 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 144 | 306 | 389 | 591
Leasing services | 11 | 13 | 21 | 26
Derivatives adjustments on commodity sales | 75 | (12) | 127 | (9)
Other | 2 | 3 | 4 | 7
Total other revenues | 88 | 4 | 152 | 24
Total revenues | 232 | 310 | 541 | 615
Corporate and eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | (7) | (14) | (22) | (24)
Leasing services | 0 | 0 | 0 | 0
Derivatives adjustments on commodity sales | 0 | 0 | 0 | 1
Other | 0 | 1 | 0 | 0
Total other revenues | 0 | 1 | 0 | 1
Total revenues | (7) | (13) | (22) | (23)
Firm services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 1,052 | 1,251 | 2,185 | 2,510
Firm services | Operating Segments | Natural Gas Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 796 | 889 | 1,661 | 1,819
Firm services | Operating Segments | Products Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 67 | 84 | 146 | 164
Firm services | Operating Segments | Terminals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 189 | 279 | 378 | 529
Firm services | Operating Segments | CO2 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Firm services | Corporate and eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | (1) | 0 | (2)
Fee-based services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 442 | 573 | 1,029 | 1,163
Fee-based services | Operating Segments | Natural Gas Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 157 | 187 | 350 | 379
Fee-based services | Operating Segments | Products Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 182 | 252 | 442 | 487
Fee-based services | Operating Segments | Terminals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 95 | 118 | 216 | 266
Fee-based services | Operating Segments | CO2 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 10 | 15 | 23 | 31
Fee-based services | Corporate and eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | (2) | 1 | (2) | 0
Total services revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 1,494 | 1,824 | 3,214 | 3,673
Total services revenues | Operating Segments | Natural Gas Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 953 | 1,076 | 2,011 | 2,198
Total services revenues | Operating Segments | Products Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 249 | 336 | 588 | 651
Total services revenues | Operating Segments | Terminals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 284 | 397 | 594 | 795
Total services revenues | Operating Segments | CO2 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 10 | 15 | 23 | 31
Total services revenues | Corporate and eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | (2) | 0 | (2) | (2)
Natural gas sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 376 | 603 | 875 | 1,356
Natural gas sales | Operating Segments | Natural Gas Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 377 | 607 | 878 | 1,361
Natural gas sales | Operating Segments | Products Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Natural gas sales | Operating Segments | Terminals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 0
Natural gas sales | Operating Segments | CO2 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 0 | 0 | 0 | 1
Natural gas sales | Corporate and eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | (1) | (4) | (3) | (6)
Product other than natural gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 284 | 544 | 751 | 1,114
Product other than natural gas | Operating Segments | Natural Gas Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 102 | 197 | 238 | 437
Product other than natural gas | Operating Segments | Products Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 49 | 61 | 158 | 127
Product other than natural gas | Operating Segments | Terminals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 3 | 5 | 6 | 7
Product other than natural gas | Operating Segments | CO2 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 134 | 291 | 366 | 559
Product other than natural gas | Corporate and eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | (4) | (10) | (17) | (16)
Commodity sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 660 | 1,147 | 1,626 | 2,470
Total revenues | 723 | 1,156 | 1,790 | 2,505
Commodity sales | Operating Segments | Natural Gas Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 479 | 804 | 1,116 | 1,798
Commodity sales | Operating Segments | Products Pipelines |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 49 | 61 | 158 | 127
Commodity sales | Operating Segments | Terminals |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 3 | 5 | 6 | 7
Commodity sales | Operating Segments | CO2 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | 134 | 291 | 366 | 560
Commodity sales | Corporate and eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers | $ (5) | $ (14) | $ (20) | $ (22)

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