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Property, Plant and Equipment (Regulated and Non-Regulated Assets) (Details) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023
Property, Plant and Equipment, Net |  |
Total cost | $ 33,651 | $ 32,273
Less: Accumulated depreciation | (10,442) | (9,994)
Total cost less: Accumulated depreciation | 23,209 | 22,279
Construction work in progress | 2,959 | 2,097
Property, Plant and Equipment, Net | 26,168 | 24,376
Generation |  |
Property, Plant and Equipment, Net |  |
Total cost | $ 14,297 | 13,500
Generation | Range, Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 5 years |
Generation | Range, Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 131 years |
Transmission |  |
Property, Plant and Equipment, Net |  |
Total cost | $ 3,106 | 2,835
Transmission | Range, Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 10 years |
Transmission | Range, Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 80 years |
Distribution |  |
Property, Plant and Equipment, Net |  |
Total cost | $ 8,512 | 7,417
Distribution | Range, Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 10 years |
Distribution | Range, Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 65 years |
Gas transmission and distribution |  |
Property, Plant and Equipment, Net |  |
Total cost | $ 4,658 | 5,536
Gas transmission and distribution | Range, Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 15 years |
Gas transmission and distribution | Range, Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 75 years |
General plant and other |  |
Property, Plant and Equipment, Net |  |
Total cost | $ 3,078 | $ 2,985
General plant and other | Range, Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 2 years |
General plant and other | Range, Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life | 60 years |

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