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RELATED PARTY TRANSACTIONS - Narrative (Details) - CAD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Apr. 03, 2023 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of transactions between related parties [line items] |  |  |
Key management personnel compensation, amount paid |  | $ 56 | $ 51
Amount recognized in net income and paid during the year |  | $ 10 | $ 8
Rogers Communications Canada Inc. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Rogers Media Inc. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% | 100.00%
Shaw Communications Inc. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Liability assumed through business combination related to a special arrangement | $ 102 |  |
Key management personnel compensation, monthly amount | 1 |  |
Key management personnel compensation, amount paid |  | $ 12 | $ 8
Key management personnel compensation, remaining liability |  | 91 |
Controlling Shareholder |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Related party transaction (less than) |  | 1 | 1
Key management personnel of entity or parent |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Accounts payable and accrued liabilities | $ 20 |  |
Period following closing | 2 years |  |
Total for all associates |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Cash repayments of advances and loans from related parties |  | $ 1 | $ 1

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