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SIGNIFICANT ACCOUNTING POLICIES (Details) - CAD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
Disclosure of reclassifications or changes in presentation [line items] |  |
Goodwill | $ 4,031,000,000 | $ 4,024,000,000
Government grants | $ 43,000,000 | 7,000,000
Senior-Unsecured Revolving Credit Facility |  |
Disclosure of reclassifications or changes in presentation [line items] |  |
Maturity (in years) | 30 years |
Notional amount | $ 665,000,000 |
Several individually immaterial acquisitions |  |
Disclosure of reclassifications or changes in presentation [line items] |  |
Goodwill |  | 51,000,000
Several individually immaterial acquisitions | Cable |  |
Disclosure of reclassifications or changes in presentation [line items] |  |
Goodwill |  | 37,000,000
Several individually immaterial acquisitions | Media |  |
Disclosure of reclassifications or changes in presentation [line items] |  |
Goodwill |  | $ 14,000,000

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