Earnings per ordinary share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Basic earnings per share
Net earnings attributable to owners of Rio Tinto	$ 9,966	$ 11,552	$ 10,058
Weighted average number of shares (in shares)	1,624.0	1,623.1	1,621.4
Basic earnings per ordinary share (in usd per share)	$ 6.137	$ 7.117	$ 6.203
Diluted earnings per share
Effect of dilutive securities shares (in shares)	14.0	10.3	10.1
Net earnings attributable to owners of Rio Tinto	$ 9,966	$ 11,552	$ 10,058
Weighted average number of shares (in shares)	1,638.0	1,633.4	1,631.5
Diluted earnings per share attributable to ordinary shareholders of Rio Tinto (in usd per share)	$ 6.084	$ 7.072	$ 6.165
Cross holdings of shares (in shares)	0.0	0.0	0.0
– Rio Tinto plc
Basic earnings per share
Weighted average number of shares (in shares)	1,253.0	1,252.1	1,250.5
– Rio Tinto Limited
Basic earnings per share
Weighted average number of shares (in shares)	371.0	371.0	370.9

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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The potential dilutive effect on the weighted average number of ordinary shares that relate to the assumed exercise of the entity's share options.

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The profit (loss) attributable to ordinary equity holders of the parent entity. [Refer: Profit (loss)]

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The profit (loss) attributable to ordinary equity holders of the parent entity, adjusted for the effects of all dilutive potential ordinary shares. [Refer: Profit (loss)]

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Cross Holdings of Shares

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