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Segmented Information (Tables)
 12 Months Ended
Dec. 31, 2024
Operating Segments [Abstract]  
Schedule of Operating Segments
Reportable segments
For the year ended December 31, 2024
Canada
$		United States
$		Global
$		Consolidated
$
Gross revenue from external customers1,665.5 4,113.6 1,720.9 7,500.0 
Less subconsultants and other direct expenses and net revenue inter-segment allocations
238.5 1,072.9 322.0 1,633.4 
Total net revenue1,427.0 3,040.7 1,398.9 5,866.6 
Direct payroll costs670.3 1,354.6 646.0 2,670.9 
Project margin756.7 1,686.1 752.9 3,195.7 

For the year ended December 31, 2023
Canada
$		United States
$		Global
$		Consolidated
$
Gross revenue from external customers1,426.5 3,634.5 1,418.6 6,479.6 
Less subconsultants and other direct expenses and net revenue inter-segment allocations
180.2 950.4 282.8 1,413.4 
Total net revenue1,246.3 2,684.1 1,135.8 5,066.2 
Direct payroll costs578.9 1,209.0 533.6 2,321.5 
Project margin667.4 1,475.1 602.2 2,744.7 
Schedule of Non-Current Assets and Gross Revenue by Geographical Areas
The following tables disclose disaggregation of non-current assets by geographic area and revenue by geographic area and services:

Geographic informationNon-Current AssetsGross Revenue
December 31,
2024		December 31,
2023
For the year ended December 31,
20242023
$$$$
(Note 6.c)
Canada692.3 541.0 1,665.5 1,426.5 
United States2,020.7 1,848.9 4,113.6 3,634.5 
United Kingdom367.0 163.2 589.3 411.6 
Australia339.3 338.3 415.2 453.3 
Other geographies493.5 158.3 716.4 553.7 
3,912.8 3,049.7 7,500.0 6,479.6 
Schedule of Gross Revenue by Services
Gross revenue by services
For the year ended December 31,
20242023
$$
Infrastructure2,040.0 1,723.7 
Water1,567.6 1,368.9 
Buildings1,661.7 1,232.6 
Environmental Services1,491.7 1,410.6 
Energy & Resources739.0 743.8 
Total gross revenue from external customers7,500.0 6,479.6