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Average number of employees (Detail) - employee | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Equity accounted units |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 4,033 | 3,403 | 3,305
Equity accounted units | Australia and New Zealand |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 858 | 725 | 704
Equity accounted units | Canada |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 50 | 5 | 0
Equity accounted units | UK |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 0 | 0 | 0
Equity accounted units | Europe |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 24 | 25 | 0
Equity accounted units | Africa |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 1,293 | 1,176 | 1,218
Equity accounted units | US |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 311 | 58 | 0
Equity accounted units | Mongolia |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 0 | 0 | 0
Equity accounted units | South America |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 1,497 | 1,414 | 1,383
Equity accounted units | India |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 0 | 0 | 0
Equity accounted units | Singapore |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 0 | 0 | 0
Equity accounted units | Other countries |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 0 | 0 | 0
Subsidiaries and joint operations |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 55,561 | 53,771 | 50,421
Percent of employees of subsidiary companies | 100.00% |  |
Subsidiaries and joint operations | Australia and New Zealand |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 25,098 | 25,045 | 23,829
Subsidiaries and joint operations | Canada |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 14,157 | 13,864 | 13,344
Subsidiaries and joint operations | UK |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 366 | 323 | 202
Subsidiaries and joint operations | Europe |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 875 | 912 | 994
Subsidiaries and joint operations | Africa |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 3,567 | 3,180 | 2,797
Subsidiaries and joint operations | US |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 4,113 | 3,973 | 3,655
Subsidiaries and joint operations | Mongolia |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 4,962 | 4,700 | 4,175
Subsidiaries and joint operations | South America |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 449 | 389 | 286
Subsidiaries and joint operations | India |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 1,183 | 611 | 396
Subsidiaries and joint operations | Singapore |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 486 | 469 | 454
Subsidiaries and joint operations | Other countries |  |  |
Disclosure of average number of employees [Line Items] |  |  |
Average number of employees (in employees) | 305 | 305 | 289

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