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REVENUES (Tables) | 6 Months Ended
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Jun. 30, 2020
Revenue from Contract with Customer [Abstract] |
Disaggregation of revenue | Recognition and Measurement of Revenues
| Liquids Pipelines |  | Gas Transmission and Midstream |  | Gas Distribution and Storage |  | Renewable Power Generation |  | Energy Services |  | Consolidated |
Three months ended June 30, 2020
(millions of Canadian dollars) |  |  |  |  |  |  |  |  |  |  |
Revenues from products transferred at a point in time | — |  | — |  | 15 |  | — |  | — |  | 15 |
Revenues from products and services transferred over time 1 | 2,165 |  | 1,197 |  | 878 |  | 54 |  | — |  | 4,294 |
Total revenue from contracts with customers | 2,165 |  | 1,197 |  | 893 |  | 54 |  | — |  | 4,309 |
| Liquids Pipelines |  | Gas Transmission and Midstream |  | Gas Distribution and Storage |  | Renewable Power Generation |  | Energy Services |  | Consolidated |
Three months ended June 30, 2019
(millions of Canadian dollars) |  |  |  |  |  |
Revenues from products transferred at a point in time | — |  | 3 |  | 17 |  | — |  | — |  | 20 |
Revenues from products and services transferred over time 1 | 2,255 |  | 1,274 |  | 960 |  | 43 |  | — |  | 4,532 |
Total revenue from contracts with customers | 2,255 |  | 1,277 |  | 977 |  | 43 |  | — |  | 4,552 |
| Liquids Pipelines |  | Gas Transmission and Midstream |  | Gas Distribution and Storage |  | Renewable Power Generation |  | Energy Services |  | Consolidated |
Six months ended June 30, 2020
(millions of Canadian dollars) |  |  |  |  |  |  |  |  |  |  |
Revenues from products transferred at a point in time | — |  | — |  | 30 |  | — |  | — |  | 30 |
Revenues from products and services transferred over time 1 | 4,631 |  | 2,538 |  | 2,542 |  | 104 |  | — |  | 9,815 |
Total revenue from contracts with customers | 4,631 |  | 2,538 |  | 2,572 |  | 104 |  | — |  | 9,845 |
| Liquids Pipelines |  | Gas Transmission and Midstream |  | Gas Distribution and Storage |  | Renewable Power Generation |  | Energy Services |  | Consolidated |
Six months ended June 30, 2019
(millions of Canadian dollars) |  |  |  |  |  |
Revenues from products transferred at a point in time | — |  | 3 |  | 34 |  | — |  | — |  | 37 |
Revenues from products and services transferred over time 1 | 4,496 |  | 2,580 |  | 3,102 |  | 93 |  | — |  | 10,271 |
Total revenue from contracts with customers | 4,496 |  | 2,583 |  | 3,136 |  | 93 |  | — |  | 10,308 |
1 Revenues 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. 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 June 30, 2020
(millions of Canadian dollars) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transportation revenues | 2,141 |  | 1,126 |  | 151 |  | — |  | — |  | — |  | 3,418 |
Storage and other revenues | 24 |  | 66 |  | 56 |  | — |  | — |  | — |  | 146 |
Gas gathering and processing revenues | — |  | 5 |  | — |  | — |  | — |  | — |  | 5 |
Gas distribution revenue | — |  | — |  | 686 |  | — |  | — |  | — |  | 686 |
Electricity and transmission revenues | — |  | — |  | — |  | 54 |  | — |  | — |  | 54 |
Total revenue from contracts with customers | 2,165 |  | 1,197 |  | 893 |  | 54 |  | — |  | — |  | 4,309 |
Commodity sales | — |  | — |  | — |  | — |  | 2,936 |  | — |  | 2,936 |
Other revenues 1,2 | 598 |  | 5 |  | 8 |  | 96 |  | 11 |  | (7 | ) | 711 |
Intersegment revenues | 182 |  | 1 |  | 2 |  | — |  | 2 |  | (187 | ) | — |
Total revenues | 2,945 |  | 1,203 |  | 903 |  | 150 |  | 2,949 |  | (194 | ) | 7,956 |
| Liquids Pipelines |  | Gas Transmission and Midstream |  | Gas Distribution and Storage |  | Renewable Power Generation |  | Energy Services |  | Eliminations and Other |  | Consolidated |
Three months ended June 30, 2019
(millions of Canadian dollars) |  |  |  |  |  |  |  |  |  |  |  |  |
Transportation revenues | 2,230 |  | 1,113 |  | 171 |  | — |  | — |  | — |  | 3,514 |
Storage and other revenues | 25 |  | 46 |  | 52 |  | — |  | — |  | — |  | 123 |
Gas gathering and processing revenues | — |  | 115 |  | — |  | — |  | — |  | — |  | 115 |
Gas distribution revenues | — |  | — |  | 754 |  | — |  | — |  | — |  | 754 |
Electricity and transmission revenues | — |  | — |  | — |  | 43 |  | — |  | — |  | 43 |
Commodity sales | — |  | 3 |  | — |  | — |  | — |  | — |  | 3 |
Total revenue from contracts with customers | 2,255 |  | 1,277 |  | 977 |  | 43 |  | — |  | — |  | 4,552 |
Commodity sales | — |  | — |  | — |  | — |  | 8,413 |  | — |  | 8,413 |
Other revenues 1, 2 | 199 |  | 10 |  | (3 | ) | 94 |  | (7 | ) | 5 |  | 298 |
Intersegment revenues | 115 |  | 1 |  | 3 |  | — |  | 12 |  | (131 | ) | — |
Total revenues | 2,569 |  | 1,288 |  | 977 |  | 137 |  | 8,418 |  | (126 | ) | 13,263 |
| Liquids Pipelines |  | Gas Transmission and Midstream |  | Gas Distribution and Storage |  | Renewable Power Generation |  | Energy Services |  | Eliminations and Other |  | Consolidated |
Six months ended June 30, 2020
(millions of Canadian dollars) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transportation revenues | 4,581 |  | 2,381 |  | 366 |  | — |  | — |  | — |  | 7,328 |
Storage and other revenues | 50 |  | 145 |  | 103 |  | — |  | — |  | — |  | 298 |
Gas gathering and processing revenues | — |  | 12 |  | — |  | — |  | — |  | — |  | 12 |
Gas distribution revenue | — |  | — |  | 2,103 |  | — |  | — |  | — |  | 2,103 |
Electricity and transmission revenues | — |  | — |  | — |  | 104 |  | — |  | — |  | 104 |
Total revenue from contracts with customers | 4,631 |  | 2,538 |  | 2,572 |  | 104 |  | — |  | — |  | 9,845 |
Commodity sales | — |  | — |  | — |  | — |  | 10,325 |  | — |  | 10,325 |
Other revenues 1,2 | (419 | ) | 21 |  | 7 |  | 199 |  | 4 |  | (13 | ) | (201 | )
Intersegment revenues | 267 |  | 1 |  | 6 |  | — |  | 18 |  | (292 | ) | — |
Total revenues | 4,479 |  | 2,560 |  | 2,585 |  | 303 |  | 10,347 |  | (305 | ) | 19,969 |
| Liquids Pipelines |  | Gas Transmission and Midstream |  | Gas Distribution and Storage |  | Renewable Power Generation |  | Energy Services |  | Eliminations and Other |  | Consolidated |
Six months ended June 30, 2019
(millions of Canadian dollars) |  |  |  |  |  |  |  |  |  |  |  |  |
Transportation revenues | 4,444 |  | 2,250 |  | 420 |  | — |  | — |  | — |  | 7,114 |
Storage and other revenues | 52 |  | 99 |  | 106 |  | — |  | — |  | — |  | 257 |
Gas gathering and processing revenues | — |  | 231 |  | — |  | — |  | — |  | — |  | 231 |
Gas distribution revenues | — |  | — |  | 2,610 |  | — |  | — |  | — |  | 2,610 |
Electricity and transmission revenues | — |  | — |  | — |  | 93 |  | — |  | — |  | 93 |
Commodity sales | — |  | 3 |  | — |  | — |  | — |  | — |  | 3 |
Total revenue from contracts with customers | 4,496 |  | 2,583 |  | 3,136 |  | 93 |  | — |  | — |  | 10,308 |
Commodity sales | — |  | — |  | — |  | — |  | 15,045 |  | — |  | 15,045 |
Other revenues 1, 2 | 539 |  | 20 |  | 26 |  | 196 |  | (1 | ) | (14 | ) | 766 |
Intersegment revenues | 192 |  | 3 |  | 6 |  | — |  | 47 |  | (248 | ) | — |
Total revenues | 5,227 |  | 2,606 |  | 3,168 |  | 289 |  | 15,091 |  | (262 | ) | 26,119 |
1 Includes mark-to-market gains/(losses) from our hedging program for the three months ended June 30, 2020 and 2019 of $531 million gain and $126 million gain, respectively and for the six months ended June 30, 2020 and 2019 of $575 million loss and $384 million gain, respectively. 2 Includes revenues from lease contracts for the three months ended June 30, 2020 and 2019 of $157 million and $151 million, respectively and for the six months ended June 30, 2020 and 2019 of $315 million and $315 million, respectively.
Contract with customer, asset and liability | Contract Balances
| Receivables |  | Contract Assets |  | Contract Liabilities |
(millions of Canadian dollars) |  |  |
Balance as at December 31, 2019 | 2,099 |  | 216 |  | 1,424 |
Balance as at June 30, 2020 | 1,642 |  | 228 |  | 1,540 |

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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 http://asc.fasb.org/extlink&oid=121604090&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 http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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