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Share of profit after tax of equity accounted units (Tables)

12 Months Ended

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.