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Inventory Financing Arrangement (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jul. 29, 2025 | Dec. 31, 2025
Debt Disclosure [Abstract] |  |
Counterparty outstanding payable term | 360 days |
Payments for inventory financing arrangement |  | $ 50
Accrued interest |  | 2
Financing charges |  | $ 2

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- Definition Inventory Financing Arrangement, Accrued Interest + References No definition available. + Details
Name: | trox_InventoryFinancingArrangementAccruedInterest
Namespace Prefix: | trox_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Inventory Financing Arrangement, Payable To Counterparty Outstanding Period + References No definition available. + Details
Name: | trox_InventoryFinancingArrangementPayableToCounterpartyOutstandingPeriod
Namespace Prefix: | trox_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- 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

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- Definition Payments For Inventory Financing Arrangements + References No definition available. + Details
Name: | trox_PaymentsForInventoryFinancingArrangements
Namespace Prefix: | trox_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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