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REGULATORY MATTERS - Schedule of Regulatory Assets and Liabilities (Details) - CAD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Regulatory Assets [Line Items] |  |
Total current regulatory assets (Note9) | $ 470 | $ 604
Total long - term regulatory assets | 5,237 | 5,863
Total regulatory assets | 5,707 | 6,467
Regulatory Liabilities [Line Items] |  |
Total current regulatory liabilities | 307 | 167
Total long - term regulatory liabilities | 3,521 | 3,624
Total regulatory liabilities | 3,828 | 3,791
Purchase gas variance |  |
Regulatory Liabilities [Line Items] |  |
Total current regulatory liabilities | 31 | 0
Other regulatory assets (liabilities) |  |
Regulatory Liabilities [Line Items] |  |
Total current regulatory liabilities | 276 | 167
Total long - term regulatory liabilities | 86 | 250
Future removal and restoration reserves |  |
Regulatory Liabilities [Line Items] |  |
Total long - term regulatory liabilities | 1,693 | 1,615
U.S income Taxes |  |
Regulatory Liabilities [Line Items] |  |
Total long - term regulatory liabilities | 854 | 918
Pipeline future abandonment costs (Note 23) |  |
Regulatory Liabilities [Line Items] |  |
Total long - term regulatory liabilities |  | 610
Pension plans and OPEB |  |
Regulatory Liabilities [Line Items] |  |
Total long - term regulatory liabilities | 143 | 231
Purchase gas variance |  |
Regulatory Assets [Line Items] |  |
Total current regulatory assets (Note9) | 15 | 190
Total long - term regulatory assets | 0 | 244
Under-recovery of fuel costs |  |
Regulatory Assets [Line Items] |  |
Total current regulatory assets (Note9) | 75 | 109
Other regulatory assets (liabilities) |  |
Regulatory Assets [Line Items] |  |
Total current regulatory assets (Note9) | 380 | 305
Total long - term regulatory assets | 252 | 244
Deferred income taxes |  |
Regulatory Assets [Line Items] |  |
Total long - term regulatory assets | 4,456 | 4,473
Long-term debt |  |
Regulatory Assets [Line Items] |  |
Total long - term regulatory assets | 348 | 378
Negative salvage |  |
Regulatory Assets [Line Items] |  |
Total long - term regulatory assets | 180 | 265
Accounting policy changes |  |
Regulatory Assets [Line Items] |  |
Total long - term regulatory assets | 0 | 219
Pension plans and OPEB |  |
Regulatory Assets [Line Items] |  |
Total long - term regulatory assets | $ 1 | $ 40

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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + 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//1943274/2147481878/980-340-50-1 + Details
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