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Segmented Information - Schedule of Gross Revenue by Services (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of products and services [line items]
Gross revenue	$ 6,479.6	$ 5,677.2
Infrastructure
Disclosure of products and services [line items]
Gross revenue	1,723.7	1,597.6
Environmental Services
Disclosure of products and services [line items]
Gross revenue	1,410.6	1,250.9
Water
Disclosure of products and services [line items]
Gross revenue	1,368.9	1,137.2
Buildings
Disclosure of products and services [line items]
Gross revenue	1,232.6	1,027.7
Energy & Resources
Disclosure of products and services [line items]
Gross revenue	$ 743.8	$ 663.8

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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.

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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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