Financing costs (Detail) - CAD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Financing costs and additional notes and loans payable information [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt-related interest | $ 27 | $ 52 | $ 64 | $ 104 | |||||||||||||||||||||||||||||||||||||||||||||||
| Capitalized interest | (25) | (39) | (52) | (80) | |||||||||||||||||||||||||||||||||||||||||||||||
| Net interest expense | 2 | 13 | 12 | 24 | |||||||||||||||||||||||||||||||||||||||||||||||
| Other interest | 0 | 1 | (12) | 2 | |||||||||||||||||||||||||||||||||||||||||||||||
| Total financing | [1] | $ 2 | $ 14 | $ 0 | $ 26 | ||||||||||||||||||||||||||||||||||||||||||||||
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- Definition Financing costs and additional notes and loans payable information No definition available.
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- Definition Amount of the cost of borrowed funds accounted for as interest expense. No definition available.
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- Definition Interest and debt related expenses associated with nonoperating financing activities of the entity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of interest expense classified as operating and nonoperating. Includes, but is not limited to, cost of borrowing accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cash paid for interest capitalized, classified as investing activity. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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