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Share of profit after tax of equity accounted units (Tables)
 12 Months Ended
Dec. 31, 2019
Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract]  
Summary of share of profit after tax of equity accounted units

2019
US$m

2018
US$m

2017
US$m

Sales revenue: Rio Tinto share(a)
2,358

2,497

1,960

Operating costs
(1,812
)
(1,656
)
(1,400
)
Profit before finance items and taxation
546

841

560

Finance items
(65
)
(69
)
(47
)
Share of profit after tax of equity accounted units
10

14

17

Profit before taxation
491

786

530

Taxation
(190
)
(273
)
(191
)
Profit for the year (Rio Tinto share)
301

513

339



(a) Sales revenue of equity accounted units includes sales by equity accounted units to Group subsidiaries.