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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

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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

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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

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No definition available.

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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

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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