XML 689 R198.htm IDEA: XBRL DOCUMENT v3.22.0.1
Share-based payments - Summary of performance share plans (Detail) - Performance share plans
 12 Months Ended
Dec. 31, 2021
shares
£ / shares
Dec. 31, 2021
shares
$ / shares
Dec. 31, 2020
shares
£ / shares
Dec. 31, 2020
shares
$ / shares
Rio Tinto plc        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of non-vested shares, beginning balance 3,778,041 3,778,041 3,803,394 3,803,394
Number of non-vested shares, awarded 676,296 676,296 716,111 716,111
Number of non-vested shares, forfeited (474,878) (474,878) (136,030) (136,030)
Number of non-vested shares, failed performance conditions (189,799) (189,799) (145,661) (145,661)
Number of non-vested shares, vested (413,588) (413,588) (459,773) (459,773)
Number of non-vested shares, ending balance 3,376,072 3,376,072 3,778,041 3,778,041
Weighted average fair value at grant date, non-vested shares, beginning balance | £ / shares £ 21.01   £ 22.20  
Weighted average fair value at grant date, non-vested shares, awarded | £ / shares 29.63   13.55  
Weighted average fair value at grant date, non-vested shares, forfeited | £ / shares 20.85   21.13  
Weighted average fair value at grant date, non-vested shares, failed performance conditions | £ / shares 19.43   16.64  
Weighted average fair value at grant date, non-vested shares, vested | £ / shares 9.48   20.55  
Weighted average fair value at grant date, non-vested shares, ending balance | £ / shares £ 24.26   £ 21.01  
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) 431,682 431,682 476,602 476,602
Number of vested awards settled in cash during the year (including dividend shares applied on vesting) 63,144 63,144 108,887 108,887
Weighted average share price, vested awards settled in shares during the year (including dividend shares applied on vesting) | £ / shares £ 62.63   £ 43.13  
Weighted average share price, vested awards settled in cash during the year (including dividend shares applied on vesting) | £ / shares £ 62.35   £ 43.13  
Rio Tinto Limited        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of non-vested shares, beginning balance 1,391,373 1,391,373 1,636,517 1,636,517
Number of non-vested shares, awarded 217,178 217,178 198,863 198,863
Number of non-vested shares, forfeited (59,291) (59,291) (178,921) (178,921)
Number of non-vested shares, failed performance conditions (89,448) (89,448) (63,852) (63,852)
Number of non-vested shares, vested (183,118) (183,118) (201,234) (201,234)
Number of non-vested shares, ending balance 1,276,694 1,276,694 1,391,373 1,391,373
Weighted average fair value at grant date, non-vested shares, beginning balance | $ / shares   $ 44.40   $ 45.11
Weighted average fair value at grant date, non-vested shares, awarded | $ / shares   60.67   33.56
Weighted average fair value at grant date, non-vested shares, forfeited | $ / shares   46.42   46.37
Weighted average fair value at grant date, non-vested shares, failed performance conditions | $ / shares   44.07   33.38
Weighted average fair value at grant date, non-vested shares, vested | $ / shares   20.96   41.21
Weighted average fair value at grant date, non-vested shares, ending balance | $ / shares   $ 50.46   $ 44.40
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) 184,876 184,876 217,287 217,287
Number of vested awards settled in cash during the year (including dividend shares applied on vesting) 29,737 29,737 28,208 28,208
Weighted average share price, vested awards settled in shares during the year (including dividend shares applied on vesting) | $ / shares   $ 127.37   $ 93.48
Weighted average share price, vested awards settled in cash during the year (including dividend shares applied on vesting) | $ / shares   $ 127.5   $ 93.82