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Share-based payments - Management Share Plans, Bonus Deferral Plans, Global Employee Share Plans and UK Share Plan (combined) (Detail) | 12 Months Ended
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Dec. 31, 2024 shares £ / shares | Dec. 31, 2024 shares $ / shares | Dec. 31, 2023 shares £ / shares | Dec. 31, 2023 shares $ / shares
Share incentive plan | – Rio Tinto plc |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares, beginning balance (in shares) | 2,810,128 | 2,810,128 | 2,585,679 | 2,585,679
Number of non-vested shares, awarded (in shares) | 1,360,676 | 1,360,676 | 1,298,578 | 1,298,578
Number of non-vested shares, forfeited (in shares) | (115,973) | (115,973) | (113,473) | (113,473)
Number of non-vested shares, cancelled | (94,111) | (94,111) | (71,160) | (71,160)
Number of non-vested shares, vested (in shares) | (909,986) | (909,986) | (889,496) | (889,496)
Number of non-vested shares, ending balance (in shares) | 3,050,734 | 3,050,734 | 2,810,128 | 2,810,128
Weighted average fair value at grant date, non-vested shares, beginning balance | £ / shares | £ 50.36 |  | £ 47.22 |
Weighted average fair value at grant date, non-vested shares, awarded | £ / shares | 46.54 |  | 49.59 |
Weighted average fair value at grant date, non-vested shares, forfeited | £ / shares | 47.67 |  | 57.02 |
Weighted average fair value at grant date, non-vested shares, cancelled | £ / shares | 44.97 |  | 46.21 |
Weighted average fair value at grant date, non-vested shares, vested | £ / shares | 52.00 |  | 39.59 |
Weighted average fair value at grant date, non-vested shares, ending balance | £ / shares | £ 48.43 |  | £ 50.36 |
Share incentive plan | – Rio Tinto Limited |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares, beginning balance (in shares) | 2,580,993 | 2,580,993 | 2,340,705 | 2,340,705
Number of non-vested shares, awarded (in shares) | 1,189,754 | 1,189,754 | 1,159,498 | 1,159,498
Number of non-vested shares, forfeited (in shares) | (152,069) | (152,069) | (144,531) | (144,531)
Number of non-vested shares, cancelled | (70,514) | (70,514) | (61,993) | (61,993)
Number of non-vested shares, vested (in shares) | (767,686) | (767,686) | (712,686) | (712,686)
Number of non-vested shares, ending balance (in shares) | 2,780,478 | 2,780,478 | 2,580,993 | 2,580,993
Weighted average fair value at grant date, non-vested shares, beginning balance | $ / shares |  | $ 103.11 |  | $ 95.27
Weighted average fair value at grant date, non-vested shares, awarded | $ / shares |  | 110.96 |  | 107.86
Weighted average fair value at grant date, non-vested shares, forfeited | $ / shares |  | 106.75 |  | 102.40
Weighted average fair value at grant date, non-vested shares, cancelled | $ / shares |  | 98.85 |  | 93.15
Weighted average fair value at grant date, non-vested shares, vested | $ / shares |  | 105.79 |  | 86.09
Weighted average fair value at grant date, non-vested shares, ending balance | $ / shares |  | $ 105.64 |  | $ 103.11
– Management Share Awards | – Rio Tinto plc |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares, beginning balance (in shares) | 1,321,207 | 1,321,207 |  |
Number of non-vested shares, ending balance (in shares) | 1,337,860 | 1,337,860 | 1,321,207 | 1,321,207
Weighted average fair value at grant date, non-vested shares, beginning balance | £ / shares | £ 54.05 |  |  |
Weighted average fair value at grant date, non-vested shares, ending balance | £ / shares | £ 52.10 |  | £ 54.05 |
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) (in shares) | 569,907 | 569,907 | 537,748 | 537,748
Weighted average share price, vested awards settled in shares during the year (including dividend shares applied on vesting) | £ / shares | £ 51.97 |  | £ 57.86 |
– Management Share Awards | – Rio Tinto Limited |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares, beginning balance (in shares) | 1,211,757 | 1,211,757 |  |
Number of non-vested shares, ending balance (in shares) | 1,228,291 | 1,228,291 | 1,211,757 | 1,211,757
Weighted average fair value at grant date, non-vested shares, beginning balance | $ / shares |  | $ 113.03 |  |
Weighted average fair value at grant date, non-vested shares, ending balance | $ / shares |  | $ 115.71 |  | $ 113.03
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) (in shares) | 458,429 | 458,429 | 476,813 | 476,813
Weighted average share price, vested awards settled in shares during the year (including dividend shares applied on vesting) | $ / shares |  | $ 123.92 |  | $ 121.87
– Bonus Deferral Awards | – Rio Tinto plc |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares, beginning balance (in shares) | 102,388 | 102,388 |  |
Number of non-vested shares, ending balance (in shares) | 74,844 | 74,844 | 102,388 | 102,388
Weighted average fair value at grant date, non-vested shares, beginning balance | £ / shares | £ 55.64 |  |  |
Weighted average fair value at grant date, non-vested shares, ending balance | £ / shares | £ 50.75 |  | £ 55.64 |
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) (in shares) | 90,422 | 90,422 | 87,475 | 87,475
Weighted average share price, vested awards settled in shares during the year (including dividend shares applied on vesting) | £ / shares | £ 50.18 |  | £ 55.43 |
Number of vested awards settled in cash during the year (including dividend shares applied on vesting) (in shares) | 0 | 0 | 0 | 0
Weighted average share price, vested awards settled in cash during the year (including dividend shares applied on vesting) | £ / shares | £ 0 |  | £ 0 |
– Bonus Deferral Awards | – Rio Tinto Limited |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares, beginning balance (in shares) | 56,597 | 56,597 |  |
Number of non-vested shares, ending balance (in shares) | 39,652 | 39,652 | 56,597 | 56,597
Weighted average fair value at grant date, non-vested shares, beginning balance | $ / shares |  | $ 113.90 |  |
Weighted average fair value at grant date, non-vested shares, ending balance | $ / shares |  | $ 117.82 |  | $ 113.90
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) (in shares) | 44,477 | 44,477 | 23,569 | 23,569
Weighted average share price, vested awards settled in shares during the year (including dividend shares applied on vesting) | $ / shares |  | $ 119.53 |  | $ 123.91
Number of vested awards settled in cash during the year (including dividend shares applied on vesting) (in shares) | 0 | 0 | 0 | 0
Weighted average share price, vested awards settled in cash during the year (including dividend shares applied on vesting) | $ / shares |  | $ 0 |  | $ 0
– Global Employee Share Plan | – Rio Tinto plc |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares, beginning balance (in shares) | 1,350,559 | 1,350,559 |  |
Number of non-vested shares, ending balance (in shares) | 1,593,851 | 1,593,851 | 1,350,559 | 1,350,559
Weighted average fair value at grant date, non-vested shares, beginning balance | £ / shares | £ 46.22 |  |  |
Weighted average fair value at grant date, non-vested shares, ending balance | £ / shares | £ 45.11 |  | £ 46.22 |
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) (in shares) | 431,973 | 431,973 | 493,187 | 493,187
Weighted average share price, vested awards settled in shares during the year (including dividend shares applied on vesting) | £ / shares | £ 51.59 |  | £ 55.05 |
– Global Employee Share Plan | – Rio Tinto Limited |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares, beginning balance (in shares) | 1,312,639 | 1,312,639 |  |
Number of non-vested shares, ending balance (in shares) | 1,512,535 | 1,512,535 | 1,312,639 | 1,312,639
Weighted average fair value at grant date, non-vested shares, beginning balance | $ / shares |  | $ 93.50 |  |
Weighted average fair value at grant date, non-vested shares, ending balance | $ / shares |  | $ 97.14 |  | $ 93.50
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) (in shares) | 401,915 | 401,915 | 374,232 | 374,232
Weighted average share price, vested awards settled in shares during the year (including dividend shares applied on vesting) | $ / shares |  | $ 120.73 |  | $ 118.12
– UK Share Plan | – Rio Tinto plc |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares, beginning balance (in shares) | 35,974 | 35,974 |  |
Number of non-vested shares, ending balance (in shares) | 44,179 | 44,179 | 35,974 | 35,974
Weighted average fair value at grant date, non-vested shares, beginning balance | £ / shares | £ 54.68 |  |  |
Weighted average fair value at grant date, non-vested shares, ending balance | £ / shares | £ 53.25 |  | £ 54.68 |
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) (in shares) | 7,403 | 7,403 | 6,791 | 6,791
Weighted average share price, vested awards settled in shares during the year (including dividend shares applied on vesting) | £ / shares | £ 51.56 |  | £ 53.28 |
– UK Share Plan | – Rio Tinto Limited |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares, beginning balance (in shares) | 0 | 0 |  |
Number of non-vested shares, ending balance (in shares) | 0 | 0 | 0 | 0
Weighted average fair value at grant date, non-vested shares, beginning balance | $ / shares |  | $ 0 |  |
Weighted average fair value at grant date, non-vested shares, ending balance | $ / shares |  | $ 0 |  | $ 0
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) (in shares) | 0 | 0 | 0 | 0
Weighted average share price, vested awards settled in shares during the year (including dividend shares applied on vesting) | $ / shares |  | $ 0 |  | $ 0

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