v3.25.3
Goodwill
 12 Months Ended
Sep. 30, 2025
Intangible assets and goodwill [abstract]  
Goodwill Goodwill
Effective October 1, 2024, the Company realigned its management structure, resulting in the reorganization of its operating segments (Note 29). The former operating segments of Scandinavia and Central Europe (Germany, Sweden, and Norway) and Northwest and Central-East Europe (primarily Netherlands, Denmark, and Czech Republic) were reorganized into Scandinavia, Northwest, and Central-East Europe operating segment (primarily Sweden, Netherlands, Norway, Denmark, and Czech Republic), and Germany operating segment. As a result, the Company is managed through the following nine operating segments: Western and Southern Europe (primarily France, Portugal and Spain); United States (U.S.) Commercial and State Government; U.S. Federal; Canada; Scandinavia, Northwest and Central-East Europe (primarily Sweden, Netherlands, Norway, Denmark and Czech Republic); United Kingdom (U.K.) and Australia; Germany; Finland, Poland and Baltics; and Asia Pacific Global Delivery Centers of Excellence (mainly India and Philippines) (Asia Pacific).
Due to the changes in operating segments and that CGUs correspond to the operating segments, the Company reallocated goodwill to the revised CGUs using their relative fair value. There were no triggering events for an early impairment test before the reclassification.
The operating segments reflect the fiscal year 2025 revised management structure and the way that the CODM, who is the President and Chief Executive Officer of the Company, evaluates the business.
The Company completed the annual impairment test during the fourth quarter of the fiscal year 2025 and did not identify any impairment.
The movements in goodwill were as follows:
Western and Southern Europe U.S. Commercial and State Government U.S. Federal Canada
Scandinavia, Northwest and Central- East Europe1
 U.K. and Australia Germany Finland, Poland and Baltics Asia Pacific Total
$ $ $ $ $ $ $ $ $ $
As at September 30, 2024 1,635,707  1,298,257  1,484,296  1,142,148  2,021,014  980,940  —  637,177  270,837  9,470,376 
Goodwill reallocation —  —  —  —  (733,992) —  733,992  —  —  — 
Business acquisitions (Note 27)
 217,519  237,886  47,507  28,750  —  1,143,403  45,702  —  —  1,720,767 
Foreign currency translation adjustment 143,498  35,124  46,908  —  125,423  81,110  68,568  54,312  (1,304) 553,639 
As at September 30, 2025 1,996,724  1,571,267  1,578,711  1,170,898  1,412,445  2,205,453  848,262  691,489  269,533  11,744,782 
1 As at September 30, 2024, the goodwill of Scandinavia and Central Europe of $1,462,970 and Northwest and Central-East Europe of $558,044, under the old management structure, were combined for presentation purposes.
Key assumptions in goodwill impairment testing
The key assumptions for the CGUs are disclosed in the following tables for the years ended September 30:
2025 Western and Southern Europe U.S. Commercial and State Government U.S. Federal Canada Scandinavia, Northwest and Central- East Europe U.K. and Australia Germany Finland, Poland and Baltics Asia Pacific
% % % % % % % % %
Pre-tax WACC
 9.7  11.3  11.4  9.1  8.5  11.1  10.1  9.9  15.9 
Long-term growth rate of net operating cash flows1
 2.0  2.0  2.0  2.0  2.0  2.0  1.9  2.0  2.0 
2024 Western and Southern Europe U.S. Commercial and State Government U.S. Federal Canada Scandinavia and Central Europe U.K. and Australia Northwest and Central-East Europe Finland, Poland and Baltics Asia Pacific
% % % % % % % % %
Pre-tax WACC
 10.3  11.4  10.3  10.9  10.0  11.5  10.2  10.3  17.8 
Long-term growth rate of net operating cash flows1
 2.0  2.0  2.0  2.0  2.0  2.0  2.0  2.0  2.0 
1 The long-term growth rate is based on the lower of published industry research growth and 2.0%.