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GOODWILL (Details) - CAD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Sep. 27, 2022 | Oct. 12, 2021
Goodwill [Roll Forward] |  |  |  |  |
Goodwill, beginning balance | $ 32,440 | $ 32,775 |  |  |
Impairment | 0 | (2,465) | $ 0 |  |
Foreign exchange and other | (638) | 1,738 |  |  |
Acquisition | 46 | 392 |  |  |
Goodwill, ending balance | 31,848 | 32,440 | 32,775 |  |
Goodwill [Abstract] |  |  |  |  |
Goodwill, gross at end of period | 35,900 | 36,500 |  |  |
Goodwill accumulated impairment | 4,100 | 4,100 |  |  |
Goodwill | 31,848 | 32,440 | 32,775 |  |
Impairment of goodwill (Note 15) | 0 | 2,465 | 0 |  |
Moda Midstream Operating, LLC (Moda) |  |  |  |  |
Goodwill [Abstract] |  |  |  |  |
Goodwill |  |  |  |  | $ 268
Tri Global Energy, LLC |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill, beginning balance | 392 |  |  |  |
Goodwill, ending balance |  | 392 |  |  |
Goodwill [Abstract] |  |  |  |  |
Goodwill |  | 392 |  | $ 392 |
Liquids Pipelines |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill, beginning balance | 8,547 | 8,041 |  |  |
Impairment |  | 0 |  |  |
Foreign exchange and other | (205) | 506 |  |  |
Acquisition | 0 | 0 |  |  |
Goodwill, ending balance | 8,342 | 8,547 | 8,041 |  |
Goodwill [Abstract] |  |  |  |  |
Goodwill | 8,342 | 8,547 | 8,041 |  |
Impairment of goodwill (Note 15) |  | 0 |  |  |
Gas Transmission and Midstream |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill, beginning balance | 18,106 | 19,335 |  |  |
Impairment |  | (2,465) |  |  |
Foreign exchange and other | (425) | 1,236 |  |  |
Acquisition | 46 | 0 |  |  |
Goodwill, ending balance | 17,727 | 18,106 | 19,335 |  |
Goodwill [Abstract] |  |  |  |  |
Goodwill | 17,727 | 18,106 | 19,335 |  |
Impairment of goodwill (Note 15) |  | 2,465 |  |  |
Gas Distribution and Storage |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill, beginning balance | 5,397 | 5,397 |  |  |
Impairment |  | 0 |  |  |
Foreign exchange and other | 0 | 0 |  |  |
Acquisition | 0 | 0 |  |  |
Goodwill, ending balance | 5,397 | 5,397 | 5,397 |  |
Goodwill [Abstract] |  |  |  |  |
Goodwill | 5,397 | 5,397 | 5,397 |  |
Impairment of goodwill (Note 15) |  | 0 |  |  |
Renewable Power Generation |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Goodwill, beginning balance | 388 | 0 |  |  |
Impairment |  | 0 |  |  |
Foreign exchange and other | (8) | (4) |  |  |
Acquisition | 0 | 392 |  |  |
Goodwill, ending balance | 380 | 388 | 0 |  |
Goodwill [Abstract] |  |  |  |  |
Goodwill | 380 | 388 | 0 |  |
Impairment of goodwill (Note 15) |  | 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 15) |  | 0 |  |  |
Gas Transmission Assets |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
Impairment | 0 | (2,500) |  |  |
Goodwill [Abstract] |  |  |  |  |
Impairment of goodwill (Note 15) | $ 0 | $ 2,500 |  |  |

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