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Segmented information - Revenues by Services and Products (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | $ 22,883 | $ 23,793
Total services |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 19,832 | 20,566
Wireless |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 6,122 | 6,323
Data |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 7,691 | 7,617
Voice |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 3,402 | 3,564
Media |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 2,369 | 2,811
Other services |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 248 | 251
Total products |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 3,051 | 3,227
Wireless |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 2,508 | 2,623
Data |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | 494 | 556
Equipment and other |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Operating revenues | $ 49 | $ 48

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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 2020-01-01 -Paragraph 113 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_113_a&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2020-01-01 -Paragraph 114 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_114&doctype=Standard -URIDate 2020-01-01 + Details
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