XML 183 R124.htm IDEA: XBRL DOCUMENT
v3.25.4

Pension and Other Postretirement Healthcare Benefits - Schedule of Asset Categories and Associated Asset Allocations for Company's Funded Retirement Plans (Details) | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
U.S. operations |  |
Pension and Other Postretirement Healthcare Benefits [Abstract] |  |
Actual | 100.00% | 100.00%
Target | 100.00% | 100.00%
U.S. operations | Equity securities |  |
Pension and Other Postretirement Healthcare Benefits [Abstract] |  |
Actual | 40.00% | 48.00%
Target | 40.00% | 48.00%
U.S. operations | Debt securities |  |
Pension and Other Postretirement Healthcare Benefits [Abstract] |  |
Actual | 57.00% | 48.00%
Target | 57.00% | 48.00%
U.S. operations | Real estate |  |
Pension and Other Postretirement Healthcare Benefits [Abstract] |  |
Actual | 0.00% | 1.00%
Target | 0.00% | 1.00%
U.S. operations | Other |  |
Pension and Other Postretirement Healthcare Benefits [Abstract] |  |
Actual | 3.00% | 3.00%
Target | 3.00% | 3.00%
International |  |
Pension and Other Postretirement Healthcare Benefits [Abstract] |  |
Actual | 100.00% | 100.00%
Target | 100.00% | 100.00%
International | Equity securities |  |
Pension and Other Postretirement Healthcare Benefits [Abstract] |  |
Actual | 0.00% | 0.00%
Target | 0.00% | 0.00%
International | Debt securities |  |
Pension and Other Postretirement Healthcare Benefits [Abstract] |  |
Actual | 0.00% | 38.00%
Target | 0.00% | 38.00%
International | Real estate |  |
Pension and Other Postretirement Healthcare Benefits [Abstract] |  |
Actual | 0.00% | 0.00%
Target | 0.00% | 0.00%
International | Other |  |
Pension and Other Postretirement Healthcare Benefits [Abstract] |  |
Actual | 100.00% | 62.00%
Target | 100.00% | 62.00%

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

X
- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=trox_DefinedBenefitPlanOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=us-gaap_ForeignPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |