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INTANGIBLE ASSETS AND GOODWILL - Overview of methods and key assumptions used to determine recoverable amounts for CGUs (Details) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022
Disclosure of information for cash-generating units [line items] |  |
Carrying value of goodwill | $ 16,280 | $ 4,031
Operating segments | Wireless |  |
Disclosure of information for cash-generating units [line items] |  |
Carrying value of goodwill | 1,634 | 1,160
Carrying value of indefinite-life intangible assets | $ 11,851 |
Period of projected cash flows (years) | 5 years |
Terminal growth rates (%) | 2.00% |
Pre-tax discount rates (%) | 8.50% |
Operating segments | Cable |  |
Disclosure of information for cash-generating units [line items] |  |
Carrying value of goodwill | $ 13,677 | 1,902
Operating segments | Cable | Cable group |  |
Disclosure of information for cash-generating units [line items] |  |
Carrying value of goodwill | 13,598 |
Carrying value of indefinite-life intangible assets | $ 0 |
Period of projected cash flows (years) | 5 years |
Terminal growth rates (%) | 1.00% |
Pre-tax discount rates (%) | 7.90% |
Operating segments | Media |  |
Disclosure of information for cash-generating units [line items] |  |
Carrying value of goodwill | $ 969 | $ 969
Carrying value of indefinite-life intangible assets | $ 232 |
Period of projected cash flows (years) | 5 years |
Terminal growth rates (%) | 2.00% |
Pre-tax discount rates (%) | 13.20% |

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