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REVENUE (Tables) | 12 Months Ended
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Dec. 31, 2023
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of Revenue | Major Products and Services
| Liquids Pipelines | Gas Transmission and Midstream | Gas Distribution and Storage | Renewable Power Generation | Energy Services | Eliminations and Other | Consolidated
Year ended December 31, 2023
(millions of Canadian dollars) |  |  |  |  |  |  |
Transportation revenue | 11,875 |  | 5,302 |  | 814 |  | — |  | — |  | — |  | 17,991 |
Storage and other revenue | 257 |  | 461 |  | 355 |  | — |  | — |  | — |  | 1,073 |
Gas distribution revenue | — |  | — |  | 4,859 |  | — |  | — |  | — |  | 4,859 |
Electricity and transmission revenue | — |  | — |  | — |  | 259 |  | — |  | — |  | 259 |
Commodity sales | — |  | 17 |  | — |  | — |  | — |  | — |  | 17 |
Total revenue from contracts with customers | 12,132 |  | 5,780 |  | 6,028 |  | 259 |  | — |  | — |  | 24,199 |
Commodity sales | — |  | — |  | — |  | — |  | 18,964 |  | — |  | 18,964 |
Other revenue 1,2 | 257 |  | 72 |  | (58) |  | 215 |  | — |  | — |  | 486 |
Intersegment revenue | 474 |  | 2 |  | 6 |  | 3 |  | 25 |  | (510) |  | — |
Total revenue | 12,863 |  | 5,854 |  | 5,976 |  | 477 |  | 18,989 |  | (510) |  | 43,649 |
| Liquids Pipelines | Gas Transmission and Midstream | Gas Distribution and Storage | Renewable Power Generation | Energy Services | Eliminations and Other | Consolidated
Year ended December 31, 2022
(millions of Canadian dollars) |  |  |  |  |  |  |
Transportation revenue | 11,283 |  | 5,012 |  | 782 |  | — |  | — |  | — |  | 17,077 |
Storage and other revenue | 235 |  | 350 |  | 308 |  | — |  | — |  | — |  | 893 |
Gas gathering and processing revenue | — |  | 22 |  | — |  | — |  | — |  | — |  | 22 |
Gas distribution revenue | — |  | — |  | 5,643 |  | — |  | — |  | — |  | 5,643 |
Electricity and transmission revenue | — |  | — |  | — |  | 281 |  | — |  | — |  | 281 |
Total revenue from contracts with customers | 11,518 |  | 5,384 |  | 6,733 |  | 281 |  | — |  | — |  | 23,916 |
Commodity sales | — |  | — |  | — |  | — |  | 29,150 |  | — |  | 29,150 |
Other revenue 1,2 | (81) |  | 39 |  | (20) |  | 305 |  | — |  | — |  | 243 |
Intersegment revenue | 615 |  | 3 |  | 16 |  | (4) |  | 25 |  | (655) |  | — |
Total revenue | 12,052 |  | 5,426 |  | 6,729 |  | 582 |  | 29,175 |  | (655) |  | 53,309 |
| Liquids Pipelines | Gas Transmission and Midstream | Gas Distribution and Storage | Renewable Power Generation | Energy Services | Eliminations and Other | Consolidated
Year ended December 31, 2021
(millions of Canadian dollars) |  |  |  |  |  |  |
Transportation revenue | 9,492 |  | 4,364 |  | 676 |  | — |  | — |  | — |  | 14,532 |
Storage and other revenue | 147 |  | 255 |  | 246 |  | — |  | — |  | — |  | 648 |
Gas gathering and processing revenue | — |  | 49 |  | — |  | — |  | — |  | — |  | 49 |
Gas distribution revenue | — |  | — |  | 4,026 |  | — |  | — |  | — |  | 4,026 |
Electricity and transmission revenue | — |  | — |  | — |  | 177 |  | — |  | — |  | 177 |
Total revenue from contracts with customers | 9,639 |  | 4,668 |  | 4,948 |  | 177 |  | — |  | — |  | 19,432 |
Commodity sales | — |  | — |  | — |  | — |  | 26,873 |  | — |  | 26,873 |
Other revenue 1,2 | 375 |  | 42 |  | 13 |  | 336 |  | — |  | — |  | 766 |
Intersegment revenue | 567 |  | 1 |  | 19 |  | (1) |  | 44 |  | (630) |  | — |
Total revenue | 10,581 |  | 4,711 |  | 4,980 |  | 512 |  | 26,917 |  | (630) |  | 47,071 |
1 Includes realized and unrealized gains and losses from our hedging program which for the year ended December 31, 2023 were a net of $97 million loss (2022 - $431 million loss; 2021 - $59 million gain). 2 Includes revenues from lease contracts. Refer to Note 26 - Leases.
Schedule of Contract Balances |
| Contract Receivables | Contract Assets | Contract Liabilities
(millions of Canadian dollars) |  |  |
Balance as at December 31, 2023 | 2,802 |  | 400 |  | 2,591 |
Balance as at December 31, 2022 | 3,183 |  | 230 |  | 2,241 |
Schedule of Performance Obligations | Performance Obligations
Segment | Nature of Performance Obligation
Liquids Pipelines | •Transportation and storage of crude oil and natural gas liquids (NGL)
Gas Transmission and Midstream | •Transportation, storage, gathering, compression and treating of natural gas
•Transportation of NGL
•Sale of crude oil, natural gas and NGL
Gas Distribution and Storage | •Supply and delivery of natural gas
•Transportation of natural gas
•Storage of natural gas
Renewable Power Generation | •Generation and transmission of electricity
•Delivery of electricity from renewable energy generation facilities
Schedule of New Accounting Pronouncements and Changes in Accounting Principles | Recognition and Measurement of Revenue
| Liquids Pipelines | Gas Transmission and Midstream | Gas Distribution and Storage | Renewable Power Generation |  | Consolidated
Year ended December 31, 2023
(millions of Canadian dollars) |  |  |  |  |  |
Revenue from products transferred at a point in time | — |  | 17 |  | 138 |  | — |  |  | 155 |
Revenue from products and services transferred over time 1 | 12,132 |  | 5,763 |  | 5,890 |  | 259 |  |  | 24,044 |
Total revenue from contracts with customers | 12,132 |  | 5,780 |  | 6,028 |  | 259 |  |  | 24,199 |
| Liquids Pipelines | Gas Transmission and Midstream | Gas Distribution and Storage | Renewable Power Generation |  | Consolidated
Year ended December 31, 2022
(millions of Canadian dollars) |  |  |  |  |  |
Revenue from products transferred at a point in time | — |  | — |  | 127 |  | — |  |  | 127 |
Revenue from products and services transferred over time 1 | 11,518 |  | 5,384 |  | 6,606 |  | 281 |  |  | 23,789 |
Total revenue from contracts with customers | 11,518 |  | 5,384 |  | 6,733 |  | 281 |  |  | 23,916 |
| Liquids Pipelines | Gas Transmission and Midstream | Gas Distribution and Storage | Renewable Power Generation |  | Consolidated
Year ended December 31, 2021
(millions of Canadian dollars) |  |  |  |  |  |
Revenue from products transferred at a point in time | — |  | — |  | 70 |  | — |  |  | 70 |
Revenue from products and services transferred over time 1 | 9,639 |  | 4,668 |  | 4,878 |  | 177 |  |  | 19,362 |
Total revenue from contracts with customers | 9,639 |  | 4,668 |  | 4,948 |  | 177 |  |  | 19,432 |
1 Revenue from crude oil and natural gas pipeline transportation, storage, natural gas gathering, compression and treating, natural gas distribution, natural gas storage services and electricity sales.

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