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Share-based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
May 08, 2024 | Jun. 24, 2020 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Mar. 27, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of authorized shares, not disclosed |  |  | true |  |  |
Restricted Share Units (RSUs) |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Granted (in shares) |  |  | 3,644,821 |  |  |
Granted (in dollars per share) |  |  | $ 7.56 | $ 16.69 | $ 16.33 |
Unrecognized compensation expense related to nonvested restricted shares and nonvested RSUs, adjusted for estimated forfeitures |  |  | $ 26 |  |  |
Weighted average period of recognition for unrecognized compensation expense (in years) |  |  | 1 year 10 months 24 days |  |  |
Total fair value of restricted shares and RSUs vested |  |  | $ 13 | $ 23 | $ 27 |
Restricted Stock Units (RSUs), Time-Based Awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award vesting period (in years) |  |  | 3 years |  |  |
Restricted Stock Units (RSUs), Time-Based Awards | Management |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Granted (in shares) |  |  | 1,896,879 |  |  |
Restricted Stock Units (RSUs), Time-Based Awards | Director |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Granted (in shares) |  |  | 250,724 |  |  |
Restricted Stock Units (RSUs), Performance-Based Awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Granted (in shares) |  |  | 1,497,218 |  |  |
Granted (in dollars per share) |  |  |  | $ 21.70 | $ 22.42 |
Restricted Stock Units (RSUs), Performance-Based Awards | Share-based Payment Arrangement, Tranche One |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Granted (in shares) |  |  | 748,609 |  |  |
Award performance Period (in years) |  |  | 3 years |  |  |
Granted (in dollars per share) |  |  | $ 8.94 |  |  |
Restricted Stock Units (RSUs), Performance-Based Awards | Share-based Payment Arrangement, Tranche Two |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Granted (in shares) |  |  | 748,609 |  |  |
Tronox Holdings Plc Amended And Restated Management Equity Incentive Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of additional shares authorized | 3,200,000 | 8,000,000 |  |  |  |
Class A |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares, awards granted (in shares) |  |  |  |  |  | 20,781,225

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