INCOME TAXES (Reconciliation of U.S. federal statutory rate to effective tax rate) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Amount
U.S. federal statutory tax rate	$ (1,261)	$ (1,410)	$ (1,608)
Withholding and other impacts on foreign earnings	(615)	(673)	(678)
Effect of foreign rates different than the U.S. federal statutory rate	(313)	(314)	(328)
Percentage depletion	183	189	221
Foreign tax credit limitation	(289)	(50)	(116)
Non-deductible permanent differences	68	29	21
Uncertain tax positions	(28)	(17)	13
PT-FI historical tax disputes	0	(8)	(193)
Valuation allowance	128	28	326
State income taxes	(6)	(4)	(14)
Other items, net	(1)	21	(90)
Provision for income taxes	$ (2,270)	$ (2,267)	$ (2,299)
%
U.S. federal statutory tax rate	(21.00%)	(21.00%)	(21.00%)
Withholding and other impacts on foreign earnings	(10.00%)	(10.00%)	(9.00%)
Effect of foreign rates different than the U.S. federal statutory rate	(5.00%)	(5.00%)	(4.00%)
Percentage deplection	3.00%	3.00%	3.00%
Foreign tax credit limitation	(5.00%)	(1.00%)	(1.00%)
Non-deductible permanent differences	(1.00%)
Uncertain tax positions	(1.00%)
PT-FI historical tax disputes	0.00%	0.00%	(3.00%)
Valuation allowance	2.00%	0.00%	4.00%
State income taxes	0.00%	0.00%	0.00%
Other items, net	0.00%	0.00%	(1.00%)
Provision for income taxes	(38.00%)	(34.00%)	(30.00%)
Tax refunds received from all jurisdictions	$ 1	$ 46	$ 109
PT Rio Tinto
Amount
Valuation allowance	$ 0	$ 0	$ 189
%
Valuation allowance	0.00%	0.00%	2.00%

Effective Income Tax Rate Reconciliation, Foreign Tax Credit Limitation, Amount

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