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Dispositions (Details of Assets and Liabilities Classified as Held for Sale) (Details) - CAD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Cash and cash equivalents | $ 8 | $ 0
Current assets held for sale | 173 | 0
Long-term assets held for sale | 2,160 | 0
Current liabilities associated with assets held for sale | 212 | 0
Long-term debt | 696 | 0
Long-term liabilities associated with assets held for sale | 1,148 | $ 0
NMGC |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Cash and cash equivalents | 8 |
Inventory | 9 |
Derivative instruments | 1 |
Regulatory assets | 28 |
Receivables and other current assets | 127 |
Current assets held for sale | 173 |
Property, plant and equipment | 1,828 |
Regulatory assets | 6 |
Goodwill | 303 |
Other long-term assets | 23 |
Long-term assets held for sale | 2,160 |
Total assets held for sale | 2,333 |
Short-term debt | 46 |
Derivative instrument | 1 |
Regulatory liabilities | 10 |
Accounts payable and other current liabilities | 155 |
Current liabilities associated with assets held for sale | 212 |
Long-term debt | 696 |
Deferred income taxes | 167 |
Regulatory liabilities | 274 |
Other long-term liabilities | 11 |
Long-term liabilities associated with assets held for sale | 1,148 |
Total liabilities associated with assets held for sale | $ 1,360 |

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