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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Net Operating Losses |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Valuation allowance, increase (decrease) | $ 219 | $ 250 | $ 44
Domestic Deferred Tax Assets |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Valuation allowance, increase (decrease) |  | (11) | 208
Foreign Tax Authority |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Income Tax Credits and Adjustments | (105) | (75) | (98)
PT Rio Tinto | Net Operating Losses |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Valuation allowance, increase (decrease) | 228 |  |
Valuation allowance for deferred tax assets |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | 4,732 | 4,576 | 4,507
Other Additions (Deductions) | (596) | 200 | 50
Additons Charged to Other Accounts | (49) | (16) | 19
SEC Schedule, 12-09, Valuation Allowances and Reserves, Period Increase (Decrease) | 0 | (28) | 0
Balance at End of Year | 4,087 | 4,732 | 4,576
Reserve for Taxes, Other than Income Taxes |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Year | 82 | 58 | 62
Other Additions (Deductions) | 18 | 21 | 0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction | 0 | (1) | 0
SEC Schedule, 12-09, Valuation Allowance and Reserves, Deduction, Other | (41) | 4 | (4)
Balance at End of Year | $ 59 | $ 82 | $ 58

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