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GOODWILL (Details) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Oct. 12, 2021
Goodwill [Roll Forward] |  |  |  |
Goodwill, beginning balance | $ 32,775 | $ 32,688 |  |
Impairment | (2,465) | 0 | $ 0 |
Foreign exchange and other | 1,738 | (200) |  |
Acquisition | 392 | 287 |  |
Goodwill, ending balance | 32,440 | 32,775 | 32,688 |
Goodwill [Abstract] |  |  |  |
Goodwill, gross at end of period | 36,500 | 34,400 |  |
Goodwill accumulated impairment | 4,100 | 1,600 |  |
Goodwill | 32,440 | 32,775 | 32,688 |
Impairment of goodwill (Note 16) | 2,465 | 0 | 0 |
Moda Midstream Operating, LLC (Moda) |  |  |  |
Goodwill [Abstract] |  |  |  |
Goodwill |  |  |  | $ 268
Liquids Pipelines |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill, beginning balance | 8,041 | 7,828 |  |
Impairment | 0 |  |  |
Foreign exchange and other | 506 | (55) |  |
Acquisition | 0 | 268 |  |
Goodwill, ending balance | 8,547 | 8,041 | 7,828 |
Goodwill [Abstract] |  |  |  |
Goodwill | 8,547 | 8,041 | 7,828 |
Impairment of goodwill (Note 16) | 0 |  |  |
Gas Transmission and Midstream |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill, beginning balance | 19,335 | 19,480 |  |
Impairment | (2,465) |  |  |
Foreign exchange and other | 1,236 | (145) |  |
Acquisition | 0 | 0 |  |
Goodwill, ending balance | 18,106 | 19,335 | 19,480 |
Goodwill [Abstract] |  |  |  |
Goodwill | 18,106 | 19,335 | 19,480 |
Impairment of goodwill (Note 16) | 2,465 |  |  |
Gas Distribution and Storage |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill, beginning balance | 5,397 | 5,378 |  |
Impairment | 0 |  |  |
Foreign exchange and other | 0 | 0 |  |
Acquisition | 0 | 19 |  |
Goodwill, ending balance | 5,397 | 5,397 | 5,378 |
Goodwill [Abstract] |  |  |  |
Goodwill | 5,397 | 5,397 | 5,378 |
Impairment of goodwill (Note 16) | 0 |  |  |
Renewable Power Generation |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill, beginning balance | 0 | 0 |  |
Impairment | 0 |  |  |
Foreign exchange and other | (4) | 0 |  |
Acquisition | 392 | 0 |  |
Goodwill, ending balance | 388 | 0 | 0 |
Goodwill [Abstract] |  |  |  |
Goodwill | 388 | 0 | 0 |
Impairment of goodwill (Note 16) | 0 |  |  |
Energy Services |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill, beginning balance | 2 | 2 |  |
Impairment | 0 |  |  |
Foreign exchange and other | 0 | 0 |  |
Acquisition | 0 | 0 |  |
Goodwill, ending balance | 2 | 2 | 2 |
Goodwill [Abstract] |  |  |  |
Goodwill | 2 | $ 2 | $ 2 |
Impairment of goodwill (Note 16) | 0 |  |  |
Gas Transmission Assets |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Impairment | (2,500) |  |  |
Goodwill [Abstract] |  |  |  |
Impairment of goodwill (Note 16) | $ 2,500 |  |  |

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