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Segmented Information - Schedule of Gross Revenue by Services (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Disclosure of products and services [line items]
Gross revenue	$ 7,500.0	$ 6,479.6
Infrastructure
Disclosure of products and services [line items]
Gross revenue	2,040.0	1,723.7
Water
Disclosure of products and services [line items]
Gross revenue	1,567.6	1,368.9
Buildings
Disclosure of products and services [line items]
Gross revenue	1,661.7	1,232.6
Environmental Services
Disclosure of products and services [line items]
Gross revenue	1,491.7	1,410.6
Energy & Resources
Disclosure of products and services [line items]
Gross revenue	$ 739.0	$ 743.8

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2024-01-01
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