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ACQUISITIONS AND DISPOSITIONS - Disposition Narrative (Details) - CAD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Apr. 01, 2024 | Mar. 31, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Gain on sale | $ 0 | $ 0 | $ 1,091 | $ 0 |  |
Alliance Pipeline And Aux Sable |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Gain on sale |  |  | 1,100 |  |  |
Gas Transmission | Alliance Pipeline And Aux Sable |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Goodwill allocated to disposal group |  |  | $ 1,000 |  |  |
Pembina Pipeline Corporation | Alliance Pipeline And Aux Sable |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Total consideration |  |  |  |  | $ 3,100 |
Non-recourse debt |  |  |  |  | $ 327 |
Alliance Pipeline Canada And Us | Alliance Pipeline And Aux Sable |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Ownership interest (in percent) |  |  |  |  |  | 50.00%
Aux Sable Midstream LLC and Aux Sable Liquid Products LP | Alliance Pipeline And Aux Sable |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Ownership interest (in percent) |  |  |  |  |  | 42.70%
Aux Sable Canada LP | Alliance Pipeline And Aux Sable |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Ownership interest (in percent) |  |  |  |  |  | 50.00%

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