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BUSINESS COMBINATIONS - Schedule Of Purchase Price Allocation (Details) |  | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Apr. 03, 2023 CAD ($) | Dec. 31, 2023 CAD ($) | Dec. 31, 2023 CAD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2021 CAD ($)
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Goodwill |  | $ 16,280,000,000 | $ 16,280,000,000 | $ 4,031,000,000 |
Amortization of deferred transaction costs |  |  | 136,000,000 | 51,000,000 |
Goodwill |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Goodwill |  | 16,280,000,000 | $ 16,280,000,000 | $ 4,031,000,000 | $ 4,024,000,000
Shaw Communications Inc. |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Cash consideration | $ 19,033,000,000 |  |  |  |
Class B non-voting shares | 23,600,000 |  |  |  |
Issuance of 23.6 million Class B Non-Voting shares | $ 1,450,000,000 |  |  |  |
Fair value of consideration transferred | 20,483,000,000 |  |  |  |
Financial Assets Recognised As Of Acquisition Date, Allowance For Doubtful Accounts | 31,000,000 |  |  |  |
Financial assets recognised as of acquisition date | 310,000,000 |  |  |  |
Other Assets, Current, Recognized As Of Acquisition Date | 2,448,000,000 |  |  |  |
Property, Plant And Equipment Including Right-Of-Use Assets Recognised As Of Acquisition Date | 8,022,000,000 |  |  |  |
Identifiable intangible assets recognised as of acquisition date | 5,974,000,000 |  |  |  |
Identifiable Investment Assets Recognized As Of Acquisition Date | 123,000,000 |  |  |  |
Identifiable Other Assets, Noncurrent Recognized As Of Acquisition Date | 48,000,000 |  |  |  |
Bank Advances Recognised As Of Acquisition Date | (25,000,000) |  |  |  |
Current Borrowings Recognised As Of Acquisition Date | (200,000,000) |  |  |  |
Financial liabilities recognised as of acquisition date | (545,000,000) |  |  |  |
Other Liabilities, Current Recognized As Of Acquisition Date | (33,000,000) |  |  |  |
Contract liabilities recognised as of acquisition date | (164,000,000) |  |  |  |
Current Portion Of Borrowings Recognised As Of Acqisition Date | (1,000,000,000) |  |  |  |
Current Lease Liabilities Recognised As Of Acquisition Date | (59,000,000) |  |  |  |
Provisions Recognised As Of Acquistion Date | (6,000,000) |  |  |  |
Non-Current Portion Of Non-Current Borrowings Recognised As Of Acquisition Date | (3,526,000,000) |  |  |  |
Non-Current Lease Liabilities Recognised As Of Acquisition Date | (268,000,000) |  |  |  |
Other Liabilities, Non-Current Recognised As Of Acquisition Date | (109,000,000) |  |  |  |
Deferred tax liabilities | (2,693,000,000) |  |  |  |
Fair value of net identifiable assets acquired and liabilities assumed | 8,297,000,000 |  |  |  |
Goodwill | 12,186,000,000 |  |  |  |
Cash Transferred, Share-Based Compensation, Settlement | 151,000,000 |  |  |  |
Amortization of deferred transaction costs | $ 24,000,000 |  |  |  |
Borrowings, Weighted Average Term To Maturity | 9 years 8 months 12 days |  |  |  |
Goodwill expected to be deductible for tax purposes | $ 0 |  |  |  |
Shaw Communications Inc. | Wireless |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Identifiable intangible assets recognised as of acquisition date | 270,000,000 |  |  |  |
Goodwill | 432,000,000 |  |  |  |
Shaw Communications Inc. | Cable West |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Identifiable intangible assets recognised as of acquisition date | 5,314,000,000 |  |  |  |
Goodwill | 11,675,000,000 |  |  |  |
Shaw Communications Inc. | Satellite |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Identifiable intangible assets recognised as of acquisition date | 390,000,000 |  |  |  |
Goodwill | $ 79,000,000 |  |  |  |
Shaw Communications Inc. | Cable and wireless network |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Measurement period adjustments recognised for particular assets, liabilities, non-controlling interests or items of consideration |  | 539,000,000 |  |  |
Shaw Communications Inc. | Deferred Tax Liabilities |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Measurement period adjustments recognised for particular assets, liabilities, non-controlling interests or items of consideration |  | (243,000,000) |  |  |
Shaw Communications Inc. | Other Current Assets |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Measurement period adjustments recognised for particular assets, liabilities, non-controlling interests or items of consideration |  | 127,000,000 |  |  |
Shaw Communications Inc. | Customer relationships |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Measurement period adjustments recognised for particular assets, liabilities, non-controlling interests or items of consideration |  | (340,000,000) |  |  |
Shaw Communications Inc. | Brand names |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Useful life measured as period of time, intangible assets other than goodwill | 3 years |  | 3 years |  |
Shaw Communications Inc. | Other intangible assets |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Useful life measured as period of time, intangible assets other than goodwill | 15 years |  | 15 years |  |
Shaw Communications Inc. | Goodwill |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Measurement period adjustments recognised for particular assets, liabilities, non-controlling interests or items of consideration |  | $ (119,000,000) |  |  |
Shaw Communications Inc. | Minimum |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Useful life measured as period of time, property, plant and equipment | 1 year |  |  |  |
Shaw Communications Inc. | Minimum | Customer relationships |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Useful life measured as period of time, intangible assets other than goodwill | 8 years |  | 8 years |  |
Shaw Communications Inc. | Maximum |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Useful life measured as period of time, property, plant and equipment | 36 years |  |  |  |
Shaw Communications Inc. | Maximum | Customer relationships |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Useful life measured as period of time, intangible assets other than goodwill | 15 years |  | 15 years |  |
Shaw Communications Inc. | Weighted Average |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |
Interest rate | 4.70% |  |  |  |

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