XML 503 R191.htm IDEA: XBRL DOCUMENT v3.23.1
Directors' and key management remuneration - Additional information (Detail)
 12 Months Ended
Dec. 31, 2021
USD ($)
director
Dec. 31, 2020
USD ($)
director
Dec. 31, 2019
USD ($)
director
Disclosure Of Directors And Key Management Remuneration [Line Items]      
Aggregate remuneration incurred $ 28,787,000 $ 59,797,000 $ 40,494,000
Aggregate pension contribution to defined contribution plans 300,000 369,000 477,000
Other employment costs $ 1,511,000 $ 2,130,000 $ 2,066,000
Defined Benefit Plan      
Disclosure Of Directors And Key Management Remuneration [Line Items]      
Number of directors accrued retirement benefits under defined contribution arrangements | director 0 0 0
Defined Contribution Plans      
Disclosure Of Directors And Key Management Remuneration [Line Items]      
Number of directors accrued retirement benefits under defined contribution arrangements | director 2 2 2
Rio Tinto plc      
Disclosure Of Directors And Key Management Remuneration [Line Items]      
Aggregate remuneration incurred $ 7,522,000 $ 14,983,000 $ 11,565,000
Aggregate pension contribution to defined contribution plans 9,000 29,000 42,000
Rio Tinto Limited      
Disclosure Of Directors And Key Management Remuneration [Line Items]      
Aggregate pension contribution to defined contribution plans 0 0 0
Aggregate remuneration including pension contributions and other retirement benefits $ 642,000 $ 707,000 $ 749,000