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Property, Plant and Equipment - Narrative (Details) $ in Millions | 12 Months Ended |
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Dec. 31, 2024 CAD ($) kV kPa | Dec. 31, 2023 CAD ($)
Property, Plant and Equipment [Abstract] |  |
Electric distribution capacity, below (kV) | kV | 69 |
Gas distribution capacity, below (kPa) | kPa | 2,070 |
Electric transmission capacity, above (kV) | kV | 69 |
Gas transmission capacity, above (kPa) | kPa | 2,070 |
Cost of PPE under finance leases | $ | $ 324 | $ 318
Cost of PPE under finance leases, accumulated depreciation | $ | $ 119 | $ 113

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- Definition Amount of accumulated amortization of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (a) -SubTopic 20 -Topic 842 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-4 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -SubTopic 20 -Topic 842 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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