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v3.26.1

Other Financing Arrangements - Schedule of Finance Charge (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Debt Disclosure [Abstract] |  |  |  |
Financing Charges | $ 1 | $ 0 | $ 2 | $ 0

X
- Definition Inventory Financing Charge + References No definition available. + Details
Name: | trox_InventoryFinancingCharge
Namespace Prefix: | trox_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration