Trade and other receivables - Schedule of Wireless Device Financing Plan Receivables (Details) - CAD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Allowance for doubtful accounts
Disclosure Of Trade And Other Receivables [Line Items]
Current	$ (164)	$ (120)
Wireless Equipment Installment Plan
Disclosure Of Trade And Other Receivables [Line Items]
Current	1,076	1,063
Non-current	399	410
Total wireless equipment installment plan receivables	1,475	1,473
Current Assets \| Wireless Equipment Installment Plan \| Allowance for doubtful accounts
Disclosure Of Trade And Other Receivables [Line Items]
Financial assets	39	45
Non-Current Assets \| Wireless Equipment Installment Plan \| Allowance for doubtful accounts
Disclosure Of Trade And Other Receivables [Line Items]
Financial assets	$ 11	$ 12

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The amount of current trade receivables. [Refer: Trade receivables]

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The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Classes of financial instruments [domain]; Financial liabilities]

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