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Business Acquisition - Additional Information (Details) | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2024 CAD ($) | Apr. 30, 2024 CAD ($) employee | Feb. 09, 2024 CAD ($) employee | Jan. 08, 2024 CAD ($) employee | Dec. 31, 2023 CAD ($) | Jun. 30, 2023 employee
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |
Goodwill recognised as of acquisition date |  |  |  |  | $ 74,200,000 |
Intangible assets |  |  |  |  | 37,600,000 |
Provisions |  |  |  |  | $ 1,100,000 |
Environmental Systems Design, Inc. |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |
Number of employees | employee |  |  |  |  |  | 300
ZETCON Ingenieure GmbH |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |
Number of employees | employee |  |  |  | 645 |  |
Goodwill recognised as of acquisition date |  |  |  | $ 207,900,000 |  |
Intangible assets |  |  |  | $ 84,300,000 |  |
Morrison Hershfield Group Inc |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |
Number of employees | employee |  |  | 1,150 |  |  |
Goodwill recognised as of acquisition date |  |  | $ 175,300,000 |  |  |
Intangible assets |  |  | $ 59,100,000 |  |  |
Hydrock Holdings Limited |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |
Number of employees | employee |  | 950 |  |  |  |
Goodwill recognised as of acquisition date |  | $ 119,800,000 |  |  |  |
Intangible assets |  | $ 40,400,000 |  |  |  |
Aggregated individually immaterial business combinations |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |
Goodwill recognised as of acquisition date | $ 503,000,000.0 |  |  |  |  |
Intangible assets | 183,800,000 |  |  |  |  |
Goodwill expected to be deductible for tax purposes | 0 |  |  |  |  |
Provisions | 24,200,000 |  |  |  |  |
Expected reimbursements related to these provisions for claims | 15,100,000 |  |  |  |  |
Gross revenue earned | 411,200,000 |  |  |  |  |
Aggregated individually immaterial business combinations | Claims |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |
Provisions | $ 20,300,000 |  |  |  |  |

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- Definition The amount of assets that have been recognised for the expected reimbursement of other provisions. [Refer: Expected reimbursement, other provisions; Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2024-01-01 -Paragraph 85 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_85_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of contingent liabilities recognised as of the acquisition date in a business combination. [Refer: Classes of contingent liabilities [domain]; Total for all business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 3 -IssueDate 2024-01-01 -Paragraph B64 -Subparagraph i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64_i&doctype=Appendix&subtype=B -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 3 -IssueDate 2024-01-01 -Paragraph IE72 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_IE72&doctype=Illustrative%20Examples -URIDate 2024-03-27 + Details
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