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REVENUES (Tables) | 3 Months Ended
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Mar. 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
Three months ended March 31, 2023
(millions of Canadian dollars) |  |  |  |  |  |  |
Transportation revenue | 2,942 |  | 1,384 |  | 276 |  | — |  | — |  | — |  | 4,602 |
Storage and other revenue | 64 |  | 95 |  | 99 |  | — |  | — |  | — |  | 258 |
Gas distribution revenue | — |  | — |  | 2,287 |  | — |  | — |  | — |  | 2,287 |
Electricity revenue | — |  | — |  | — |  | 66 |  | — |  | — |  | 66 |
Total revenue from contracts with customers | 3,006 |  | 1,479 |  | 2,662 |  | 66 |  | — |  | — |  | 7,213 |
Commodity sales | — |  | — |  | — |  | — |  | 4,783 |  | — |  | 4,783 |
Other revenue 1,2 | 30 |  | 11 |  | (40) |  | 78 |  | — |  | — |  | 79 |
Intersegment revenue | 129 |  | 1 |  | 3 |  | — |  | 18 |  | (151) |  | — |
Total revenue | 3,165 |  | 1,491 |  | 2,625 |  | 144 |  | 4,801 |  | (151) |  | 12,075 |
| Liquids Pipelines | Gas Transmission and Midstream | Gas Distribution and Storage | Renewable Power Generation | Energy Services | Eliminations and Other | Consolidated
Three months ended March 31, 2022
(millions of Canadian dollars) |  |  |  |  |  |  |
Transportation revenue | 2,685 |  | 1,194 |  | 251 |  | — |  | — |  | — |  | 4,130 |
Storage and other revenue | 51 |  | 84 |  | 47 |  | — |  | — |  | — |  | 182 |
Gas gathering and processing revenue | — |  | 15 |  | — |  | — |  | — |  | — |  | 15 |
Gas distribution revenue | — |  | — |  | 2,098 |  | — |  | — |  | — |  | 2,098 |
Electricity revenue | — |  | — |  | — |  | 62 |  | — |  | — |  | 62 |
Total revenue from contracts with customers | 2,736 |  | 1,293 |  | 2,396 |  | 62 |  | — |  | — |  | 6,487 |
Commodity sales | — |  | — |  | — |  | — |  | 8,325 |  | — |  | 8,325 |
Other revenue 1,2 | 178 |  | 7 |  | 4 |  | 94 |  | 2 |  | — |  | 285 |
Intersegment revenue | 141 |  | — |  | 11 |  | — |  | 10 |  | (162) |  | — |
Total revenue | 3,055 |  | 1,300 |  | 2,411 |  | 156 |  | 8,337 |  | (162) |  | 15,097 |
1 Includes realized and unrealized gains and losses from our hedging program which for the three months ended March 31, 2023 were a net $55 million loss (2022 - $94 million gain). 2 Includes revenues from lease contracts for the three months ended March 31, 2023 and 2022 of $144 million and $164 million, respectively. Recognition and Measurement of Revenues
| Liquids Pipelines | Gas Transmission and Midstream | Gas Distribution and Storage | Renewable Power Generation |  | Consolidated
Three months ended March 31, 2023
(millions of Canadian dollars) |  |  |  |  |  |
Revenue from products transferred at a point in time | — |  | — |  | 30 |  | — |  |  | 30 |
Revenue from products and services transferred over time 1 | 3,006 |  | 1,479 |  | 2,632 |  | 66 |  |  | 7,183 |
Total revenue from contracts with customers | 3,006 |  | 1,479 |  | 2,662 |  | 66 |  |  | 7,213 |
| Liquids Pipelines | Gas Transmission and Midstream | Gas Distribution and Storage | Renewable Power Generation |  | Consolidated
Three months ended March 31, 2022
(millions of Canadian dollars) |  |  |  |  |  |
Revenue from products transferred at a point in time | — |  | — |  | 16 |  | — |  |  | 16 |
Revenue from products and services transferred over time 1 | 2,736 |  | 1,293 |  | 2,380 |  | 62 |  |  | 6,471 |
Total revenue from contracts with customers | 2,736 |  | 1,293 |  | 2,396 |  | 62 |  |  | 6,487 |
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.
Schedule of Contract with Customer, Asset and Liability | Contract Balances
| Contract Receivables | Contract Assets | Contract Liabilities
(millions of Canadian dollars) |  |  |
Balance as at March 31, 2023 | 3,186 |  | 232 |  | 2,328 |
Balance as at December 31, 2022 | 3,183 |  | 230 |  | 2,241 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 + Details
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