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Average number of employees (Tables) | 12 Months Ended
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Dec. 31, 2018
Number And Average Number Of Employees [Abstract] |
Summary of average number of employees |
| Subsidiaries and joint operations |  | Equity accounted units (Rio Tinto share) |  | Group total |
|  | 2018 |  |  | 2017 |  |  | 2016 |  |  | 2018 |  |  | 2017 |  |  | 2016 |  |  | 2018 |  |  | 2017 |  |  | 2016 |
Principal locations of |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
employment: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Australia and New Zealand |  | 19,017 |  |  | 19,041 |  |  | 20,489 |  |  | 578 |  |  | 602 |  |  | 849 |  |  | 19,595 |  |  | 19,643 |  |  | 21,338 |
Canada |  | 10,620 |  |  | 10,256 |  |  | 10,239 |  |  | - |  |  | - |  |  | - |  |  | 10,620 |  |  | 10,256 |  |  | 10,239 |
UK |  | 287 |  |  | 309 |  |  | 487 |  |  | - |  |  | - |  |  | - |  |  | 287 |  |  | 309 |  |  | 487 |
Europe |  | 1,418 |  |  | 1,505 |  |  | 1,722 |  |  | - |  |  | - |  |  | - |  |  | 1,418 |  |  | 1,505 |  |  | 1,722 |
Africa |  | 3,496 |  |  | 3,461 |  |  | 4,875 |  |  | 1,262 |  |  | 1,269 |  |  | 1,270 |  |  | 4,758 |  |  | 4,730 |  |  | 6,145 |
US |  | 3,792 |  |  | 3,429 |  |  | 3,196 |  |  | - |  |  | - |  |  | - |  |  | 3,792 |  |  | 3,429 |  |  | 3,196 |
Mongolia |  | 2,886 |  |  | 2,861 |  |  | 2,737 |  |  | - |  |  | - |  |  | - |  |  | 2,886 |  |  | 2,861 |  |  | 2,737 |
Indonesia |  | 1,615 |  |  | 1,642 |  |  | 2,862 |  |  | - |  |  | - |  |  | - |  |  | 1,615 |  |  | 1,642 |  |  | 2,862 |
South America |  | 210 |  |  | 197 |  |  | 166 |  |  | 1,289 |  |  | 1,237 |  |  | 1,388 |  |  | 1,499 |  |  | 1,434 |  |  | 1,554 |
Other countries (a) |  | 988 |  |  | 998 |  |  | 749 |  |  | - |  |  | - |  |  | - |  |  | 988 |  |  | 998 |  |  | 749 |
Total |  | 44,329 |  |  | 43,699 |  |  | 47,522 |  |  | 3,129 |  |  | 3,108 |  |  | 3,507 |  |  | 47,458 |  |  | 46,807 |  |  | 51,029 |
(a) | “Other countries” primarily includes employees in the Middle East (excluding Oman which is included in Africa), India, Singapore and other countries in Asia which are not shown separately in the table above. For the year ended 31 December 2018, the average number of employees in Singapore was 422 (2017: 434; 2016: 262) and the average number of employees in India was 288 (2017: 310; 2016: 280).

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