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REGULATORY MATTERS - Liquids Pipelines (Narrative) (Details) - CAD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Public Utilities, General Disclosures [Line Items] |  |
Total regulatory asset | $ 7,619 | $ 5,707
Canadian Mainline |  |
Public Utilities, General Disclosures [Line Items] |  |
Total regulatory asset | $ 2,000 | $ 1,900

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- Definition The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478742/980-340-50-1 + Details
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