XML 427 R115.htm IDEA: XBRL DOCUMENT v3.23.1

Dividends - Summary of dividends per share (Detail)	12 Months Ended
	Dec. 31, 2021 £ / shares	Dec. 31, 2021 $ / shares	Dec. 31, 2021 $ / shares	Dec. 31, 2020 £ / shares	Dec. 31, 2020 $ / shares	Dec. 31, 2020 $ / shares	Dec. 31, 2019 £ / shares	Dec. 31, 2019 $ / shares	Dec. 31, 2019 $ / shares	Dec. 31, 2018 $ / shares
Final Dividends | Rio Tinto plc
Disclosure of Dividends [Line Items]
Previous year final dividend per share (in pence/cents per share) | (per share)	£ 2.2186			£ 1.7747	$ 3.09		£ 1.3596	$ 2.31		$ 1.80
Interim dividend per share (in pence/cents per share) | (per share)	£ 2.7084	$ 3.76		£ 1.1974	$ 1.55		£ 1.2332	$ 1.51
Final Dividends | Rio Tinto Limited
Disclosure of Dividends [Line Items]
Franked final dividend percentage	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%
Franked Interim dividend percentage	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%
Previous year final dividend per share (in pence/cents per share)			$ 3.9748			$ 3.4974			$ 2.5089
Interim dividend per share (in pence/cents per share)			$ 5.0942			$ 2.1647			$ 2.1908
Special Dividends | Rio Tinto plc
Disclosure of Dividends [Line Items]
Previous year final dividend per share (in pence/cents per share) | (per share)	£ 0.6677			£ 0	$ 0.93			$ 1.8355		$ 2.43
Interim dividend per share (in pence/cents per share) | (per share)	£ 1.3326	$ 1.85		£ 0			£ 0.4982	$ 0.61
Special Dividends | Rio Tinto Limited
Disclosure of Dividends [Line Items]
Franked final dividend percentage	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%
Franked Interim dividend percentage	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%	30.00%
Previous year final dividend per share (in pence/cents per share)			$ 1.1963			$ 0			$ 3.3870
Interim dividend per share (in pence/cents per share)			$ 2.5064			$ 0			$ 0.8850

X

- Definition

Disclosure of Dividends [Line Items]

+ References

No definition available.

+ Details

Name:	rio_DisclosureOfDividendsLineItems
Namespace Prefix:	rio_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of dividendsper share relating to the current year, recognised as distributions to owners of the parent.

+ References

No definition available.

+ Details

Name:	rio_DividendsPerShareAsDistributionsToOwnersOfParentRelatingToCurrentYear
Namespace Prefix:	rio_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of dividends per share relating to prior years, recognised as distributions to owners of the parent.

+ References

No definition available.

+ Details

Name:	rio_DividendsPerShareAsDistributionsToOwnersOfParentRelatingToPriorYears
Namespace Prefix:	rio_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

In this arrangement the shareholder is able to reduce the tax paid on the final dividend by an amount equal to the tax imputation credits.

+ References

No definition available.

+ Details

Name:	rio_FrankedFinalDividendPercentage
Namespace Prefix:	rio_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

In this arrangement the shareholder is able to reduce the tax paid on the interim dividend by an amount equal to the tax imputation credits.

+ References

No definition available.

+ Details

Name:	rio_FrankedInterimDividendPercentage
Namespace Prefix:	rio_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	rio_DividendTypeAxis=rio_FinalDividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=rio_RioTintoPlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=rio_RioTintoLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	rio_DividendTypeAxis=rio_SpecialDividendsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: