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REGULATORY MATTERS - Schedule of Regulatory Assets and Liabilities (Details) - CAD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Regulatory Assets [Line Items] |  |
Regulatory assets (Note 7) | $ 259 | $ 232
Noncurrent regulatory assets | 5,606 | 5,397
Regulatory assets | 5,865 | 5,629
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 106 | 270
Noncurrent regulatory liabilities | 3,321 | 3,124
Regulatory liabilities | 3,427 | 3,394
Purchased gas variance |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 153
Other Regulatory Assets (Liabilities) |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 106 | 117
Noncurrent regulatory liabilities | 234 | 150
Future removal and restoration costs |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 1,543 | 1,455
U.S income Taxes |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 895 | 941
Pipeline future abandonment costs |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 649 | 578
Purchase gas variance |  |
Regulatory Assets [Line Items] |  |
Noncurrent regulatory assets | 215 | 0
Under-recovery of fuel costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets (Note 7) | 114 | 86
Deferred income taxes |  |
Regulatory Assets [Line Items] |  |
Noncurrent regulatory assets | 4,176 | 3,890
Long-term debt |  |
Regulatory Assets [Line Items] |  |
Noncurrent regulatory assets | 398 | 429
Pension plans and OPEB |  |
Regulatory Assets [Line Items] |  |
Noncurrent regulatory assets | 78 | 402
Negative salvage |  |
Regulatory Assets [Line Items] |  |
Noncurrent regulatory assets | 243 | 246
Accounting policy changes |  |
Regulatory Assets [Line Items] |  |
Noncurrent regulatory assets | 157 | 169
Other Regulatory Assets (Liabilities) |  |
Regulatory Assets [Line Items] |  |
Regulatory assets (Note 7) | 145 | 146
Noncurrent regulatory assets | $ 339 | $ 261

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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