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Segmented Information - Schedule of Gross Revenue by Services (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of products and services [line items]
Gross revenue	$ 4,576.8	$ 4,730.1
Buildings
Disclosure of products and services [line items]
Gross revenue	904.8	990.8
Energy & Resources
Disclosure of products and services [line items]
Gross revenue	559.2	631.9
Environmental Services
Disclosure of products and services [line items]
Gross revenue	831.7	749.3
Infrastructure
Disclosure of products and services [line items]
Gross revenue	1,266.2	1,354.2
Water
Disclosure of products and services [line items]
Gross revenue	$ 1,014.9	$ 1,003.9

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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
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