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Segmented information - Revenues by Services and Products (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | $ 24,673 | $ 24,174
External Service Revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 24,673 | 24,174
Wireless |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 7,120 | 6,821
Wireline data |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 8,084 | 7,920
Wireline voice |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 2,862 | 3,002
Media |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 2,776 | 2,904
Other wireline services |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 312 | 309
Total services |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 21,154 | 20,956
Total services | External Service Revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 21,154 | 20,956
Wireless |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 2,885 | 2,714
Wireline |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 634 | 504
Total products |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | $ 3,519 | $ 3,218

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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2023-01-01 -Paragraph 114 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_114&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2023-01-01 -Paragraph 113 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_113_a&doctype=Standard -URIDate 2023-03-23 + Details
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