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LONG-TERM INVESTMENTS - Disposition (Details) $ in Millions, $ in Millions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 17, 2022 CAD ($) | Aug. 17, 2022 USD ($) | Dec. 31, 2024 CAD ($) | Dec. 31, 2023 CAD ($) | Dec. 31, 2022 CAD ($) | Apr. 01, 2024 CAD ($) | Mar. 31, 2024
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Gain on sale | $ 1,100 | $ 832 | $ 0 | $ 0 | $ 1,076 |  |
Goodwill |  |  | 36,600 | 31,848 | 32,440 |  |
Gas Transmission |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Goodwill |  |  | 18,278 | $ 17,727 | $ 18,106 |  |
Disposal Group, Alliance Pipeline And Aux Sable |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Gain on sale |  |  | $ 1,100 |  |  |  |
Disposal Group, Alliance Pipeline And Aux Sable | Gas Transmission |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 1,000 |
Disposal Group, Alliance Pipeline And Aux Sable | Pembina Pipeline Corporation |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Disposal group, consideration |  |  |  |  |  | 3,100 |
Non-recourse debt |  |  |  |  |  | $ 327 |
Alliance Pipeline | Disposal Group, Alliance Pipeline And Aux Sable |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Ownership interest (as percent) |  |  |  |  |  |  | 50.00%

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