Trade and other receivables - Schedule of Trade and Other Receivables (Details) - CAD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Disclosure Of Trade And Other Receivables [Line Items] | ||
| Current tax receivable | $ 348 | $ 112 |
| Other accounts receivable | 325 | 376 |
| Total trade and other receivables | 4,474 | 4,489 |
| Trade receivables | ||
| Disclosure Of Trade And Other Receivables [Line Items] | ||
| Current | 4,113 | 4,305 |
| Allowance for revenue adjustments | ||
| Disclosure Of Trade And Other Receivables [Line Items] | ||
| Current | (158) | (191) |
| Allowance for doubtful accounts | ||
| Disclosure Of Trade And Other Receivables [Line Items] | ||
| Current | (164) | (120) |
| Commodity taxes receivable | ||
| Disclosure Of Trade And Other Receivables [Line Items] | ||
| Current | $ 10 | $ 7 |
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- Definition [Line Items] for Disclosure Of Trade And Other Receivables [Table] No definition available.
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- Definition The amount of current receivables from taxes other than income tax. [Refer: Receivables from taxes other than income tax] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of current trade receivables. [Refer: Trade receivables] Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount of current other receivables. [Refer: Other receivables] Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount of current trade receivables and current other receivables. [Refer: Current trade receivables; Other current receivables] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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