Business acquisitions and dispositions - Summary of Fair Value of Consideration From OUTFRONT Media Acquisition (Details) - OUTEDGE $ in Millions	Jun. 07, 2024 CAD ($)
Disclosure of detailed information about business combination [line items]
Cash consideration paid	$ 429
Total cost to be allocated	429
Trade and other receivables	40
Other non-cash working capital	6
Assets held for sale	11
Property, plant and equipment	263
Finite-life intangible assets	17
Other non-current assets	34
Trade payables and other liabilities	(12)
Contract liabilities	(1)
Debt due within one year	(20)
Liabilities held for sale	(10)
Long-term debt	(100)
Deferred tax liabilities	(87)
Other non-current liabilities	(7)
Identifiable assets acquired (liabilities assumed), excluding cash and cash equivalents and goodwill	134
Cash and cash equivalents	11
Fair value of net assets acquired	145
Goodwill	$ 284

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Current Borrowings Recognised As of Acquisition Date

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Identifiable Assets Acquired (Liabilities Assumed), Excluding Cash And Cash Equivalents and Goodwill

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Liabilities Held For Sale Recognized As Of Acquisition Date

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Non-current Borrowings Recognised As Of Acquisition Date

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Other Non-cash Working Capital Recognized As Of Acquisition Date

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Trade And Other Receivables Recognised As Of Acquisition Date

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The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Total for all business combinations [member]]

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The amount recognised as of the acquisition date for cash and cash equivalents acquired in a business combination. [Refer: Cash and cash equivalents; Total for all business combinations [member]]

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The fair value, at acquisition date, of cash transferred as consideration in a business combination. [Refer: Total for all business combinations [member]]

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The amount recognised as of the acquisition date for contract liabilities assumed in a business combination. [Refer: Contract liabilities; Total for all business combinations [member]]

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The amount recognised as of the acquisition date for deferred tax liabilities assumed in a business combination. [Refer: Deferred tax liabilities; Total for all business combinations [member]]

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The amount recognised as of the business combination's acquisition date for goodwill. [Refer: Goodwill; Total for all business combinations [member]]

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The amount recognised as of the acquisition date for net identifiable assets acquired or liabilities assumed in a business combination. [Refer: Total for all business combinations [member]]

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The amount recognised as of the acquisition date for identifiable intangible assets acquired in a business combination. [Refer: Intangible assets other than goodwill; Total for all business combinations [member]]

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The amount recognised as of the acquisition date for non-current assets acquired in a business combination. [Refer: Non-current assets; Total for all business combinations [member]]

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The amount recognised as of the acquisition date for non-current liabilities assumed in a business combination. [Refer: Non-current liabilities; Total for all business combinations [member]]

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The amount recognised as of the acquisition date for plant, property and equipment acquired in a business combination. [Refer: Property, plant and equipment; Total for all business combinations [member]]

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The amount recognised as of the acquisition date for trade and other payables assumed in a business combination. [Refer: Trade and other payables; Total for all business combinations [member]]

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