XML 120 R97.htm IDEA: XBRL DOCUMENT
v3.22.4

Pension and Other Postretirement Healthcare Benefits - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 USD ($) plan | Dec. 31, 2022 USD ($) plan | Dec. 31, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |
Number of plans | plan | 1 | 1 |
Pensions |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Settlements | $ 20 |  |
Employer contributions |  | $ 6 |
Contributions expected in the next year | $ 8 | $ 8 |
Pensions | Retirement Plan Name, Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Required employer contribution percentage |  | 20.40% |
Pensions | International |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Settlements |  | $ 0 | $ 0
Employer contributions |  | 4 | 6
Other Post Retirement Benefit Plans | International |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Settlements |  | 0 | 0
Employer contributions |  | $ 1 | $ 1
Other Post Retirement Benefit Plans | South Africa |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage of post-retirement and death-in-service benefits for members employed before March 1, 1994 |  | 100.00% |
Annual percentage of post-retirement and death-in-service benefits for members employed on or after March 1, 1994 but before January 1, 2002 |  | 2.00% |
Percentage of post-retirement and death-in-service benefits for members employed on or after January 1, 2002 |  | 0.00% |
Other Post Retirement Benefit Plans | South Africa | Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage of post-retirement and death-in-service benefits for members employed on or after March 1, 1994 but before January 1, 2002 |  | 50.00% |

X
- Definition Defined Benefit Plans, Number of Plans + References No definition available. + Details
Name: | trox_DefinedBenefitPlansNumberOfPlans
Namespace Prefix: | trox_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Refers to the percentage of post-retirement and death-in-service benefits for members employed in the first period. + References No definition available. + Details
Name: | trox_PercentageOfPostRetirementAndDeathInServiceBenefitsForMembersEmployedInPeriodOne
Namespace Prefix: | trox_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Refers to the percentage of post-retirement and death-in-service benefits for members employed in the third period. + References No definition available. + Details
Name: | trox_PercentageOfPostRetirementAndDeathInServiceBenefitsForMembersEmployedInPeriodThree
Namespace Prefix: | trox_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Refers to the percentage of post-retirement and death-in-service benefits for members employed in the second period. + References No definition available. + Details
Name: | trox_PercentageOfPostRetirementAndDeathInServiceBenefitsForMembersEmployedInPeriodTwo
Namespace Prefix: | trox_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Refers to the annual percentage of post-retirement and death-in-service benefits for members employed in the second period. + References No definition available. + Details
Name: | trox_PercentageOfPostRetirementAndDeathInServiceBenefitsPerYearForMembersEmployedInPeriodTwo
Namespace Prefix: | trox_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanContributionsByEmployer
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(8) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanSettlementsPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of employer contribution required by collective-bargaining arrangement (CBA) to total employer contribution for multiemployer pension plan determined to be individually insignificant. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
Name: | us-gaap_MultiemployerPlanPensionInsignificantEmployerContributionUnderCollectiveBargainingArrangementToTotalEmployerContributionPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanNameAxis=us-gaap_RetirementPlanNameOtherMember
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: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_DefinedBenefitPostretirementHealthCoverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |