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Share of profit after tax of equity accounted units (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure Of Detailed Information About Share Of Profit After Tax Of Equity Accounted Units [Abstract] |
Summary of share of profit after tax of equity accounted units |
|  | 2018 |  |  | 2017 |  |  | 2016 |
| US$m |  | US$m |  | US$m |
Sales revenue: Rio Tinto share (a) |  | 2,497 |  |  | 1,960 |  |  | 1,727 |
Operating costs |  | (1,656 | ) |  | (1,400 | ) |  | (1,237 | )
Profit before finance items and taxation |  | 841 |  |  | 560 |  |  | 490 |
Finance items |  | (69 | ) |  | (47 | ) |  | (33 | )
Share of profit after tax of equity accounted units |  | 14 |  |  | 17 |  |  | 20 |
Profit before taxation |  | 786 |  |  | 530 |  |  | 477 |
Taxation |  | (273 | ) |  | (191 | ) |  | (156 | )
Profit for the year (Rio Tinto share) |  | 513 |  |  | 339 |  |  | 321 |
(a) | Sales revenue of equity accounted units includes sales by equity accounted units to Group subsidiaries.

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- Definition Detailed information about share of profit after tax of equity accounted units. + References No definition available. + Details
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