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Employee Costs - Schedule of Employee Benefits Cost (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Analysis of income and expense [abstract]
Wages, salaries, and benefits	$ 4,238.9	$ 3,654.5
Contingent employment payments	6.6	19.5
Pension costs	126.7	108.0
Net share-based compensation	43.0	60.1
Total employee costs	4,415.2	3,842.1
Direct payroll costs	2,670.9	2,321.5
Indirect labor	$ 1,744.3	$ 1,520.6

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The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment.

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The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions]

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The amount of long-term employee benefits other than post-employment benefits and termination benefits. Such benefits may include long-term paid absences, jubilee or other long-service benefits, long-term disability benefits, long-term profit-sharing and bonuses and long-term deferred remuneration. [Refer: Employee benefits expense]

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The amount of post-employment benefit expense included in profit or loss

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The amount of expense from employee benefits (other than termination benefits) that are expected to be settled wholly within twelve months after the end of the annual reporting period in which the employees render the related services.

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Direct Payroll Costs

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Indirect labor costs.

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