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REVENUE - Disaggregation of Revenue (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | $ 14,655 | $ 13,916
Service revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 12,533 | 11,955
Equipment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2,122 | 1,961
Operating segments | Wireless |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 8,768 | 8,530
Operating segments | Wireless | Service revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 6,666 | 6,579
Operating segments | Wireless | Equipment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 2,102 | 1,951
Operating segments | Cable |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 4,072 | 3,946
Operating segments | Cable | Service revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 4,052 | 3,936
Operating segments | Cable | Equipment revenue |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 20 | 10
Operating segments | Media |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | 1,975 | 1,606
Corporate items and intercompany eliminations |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Revenue | $ (160) | $ (166)

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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 2021-01-01 -Paragraph 113 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_113_a&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2021-01-01 -Paragraph 114 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_114&doctype=Standard -URIDate 2021-03-24 + Details
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