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REVENUE - Disaggregation of Revenue (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] |  |
Revenue | $ 19,308 | $ 15,396
Service revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 16,845 | 13,305
Equipment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2,463 | 2,091
Operating segments | Wireless |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 10,222 | 9,197
Operating segments | Wireless | Service revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 7,802 | 7,131
Operating segments | Wireless | Equipment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2,420 | 2,066
Operating segments | Cable |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 7,005 | 4,071
Operating segments | Cable | Service revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 6,962 | 4,046
Operating segments | Cable | Equipment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 43 | 25
Operating segments | Media |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2,335 | 2,277
Corporate items and intercompany eliminations |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | $ (254) | $ (149)

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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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