condensed interim consolidated financial statements (Details) - CAD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Condensed Financial Statements, Captions [Line Items]
Mobile handsets, parts and accessories	$ 340		$ 340		$ 381
Costs of goods sold	$ 500	$ 500	$ 1,000	$ 1,000

The amount of all expenses directly or indirectly attributed to the goods or services sold. Attributed expenses include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, such as depreciation and maintenance of factory buildings and equipment used in the production process, unallocated production overheads, and abnormal amounts of production costs of inventories.

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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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