XML 128 R105.htm IDEA: XBRL DOCUMENT
v3.22.4

Pension and Other Postretirement Healthcare Benefits, Summary of Fair Value of Pension Investments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Change in plan assets: |  |
Fair value of plan assets, beginning of year | $ 519 |
Fair value of plan assets, end of year | 286 | $ 519
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 305 |
Fair value of plan assets, end of year | 166 | 305
Significant Other Observable Inputs (Level 2) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 116 |
Fair value of plan assets, end of year | 57 | 116
Significant Unobservable Inputs (Level 3) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 98 |
Fair value of plan assets, end of year | 63 | 98
Global equity securities |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 93 |
Fair value of plan assets, end of year | 53 | 93
Global equity securities | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 93 |
Fair value of plan assets, end of year | 53 | 93
Global equity securities | Significant Other Observable Inputs (Level 2) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
Global equity securities | Significant Unobservable Inputs (Level 3) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
Global commingled equity funds |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 73 |
Fair value of plan assets, end of year | 35 | 73
Global commingled equity funds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 73 |
Fair value of plan assets, end of year | 35 | 73
Global commingled equity funds | Significant Other Observable Inputs (Level 2) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
Global commingled equity funds | Significant Unobservable Inputs (Level 3) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
US government bonds |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 81 |
Fair value of plan assets, end of year | 48 | 81
US government bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 81 |
Fair value of plan assets, end of year | 48 | 81
US government bonds | Significant Other Observable Inputs (Level 2) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
US government bonds | Significant Unobservable Inputs (Level 3) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
Foreign government bonds |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 39 |
Fair value of plan assets, end of year | 19 | 39
Foreign government bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 39 |
Fair value of plan assets, end of year | 19 | 39
Foreign government bonds | Significant Other Observable Inputs (Level 2) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
Foreign government bonds | Significant Unobservable Inputs (Level 3) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
US corporate bonds |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 73 |
Fair value of plan assets, end of year | 34 | 73
US corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
US corporate bonds | Significant Other Observable Inputs (Level 2) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 73 |
Fair value of plan assets, end of year | 34 | 73
US corporate bonds | Significant Unobservable Inputs (Level 3) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
Foreign corporate bonds |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 42 |
Fair value of plan assets, end of year | 22 | 42
Foreign corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
Foreign corporate bonds | Significant Other Observable Inputs (Level 2) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 42 |
Fair value of plan assets, end of year | 22 | 42
Foreign corporate bonds | Significant Unobservable Inputs (Level 3) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
Property/ real estate fund |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 1 |
Fair value of plan assets, end of year | 1 | 1
Property/ real estate fund | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
Property/ real estate fund | Significant Other Observable Inputs (Level 2) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 1 |
Fair value of plan assets, end of year | 1 | 1
Property/ real estate fund | Significant Unobservable Inputs (Level 3) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
Insurance contracts |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 98 |
Fair value of plan assets, end of year | 63 | 98
Insurance contracts | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
Insurance contracts | Significant Other Observable Inputs (Level 2) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
Insurance contracts | Significant Unobservable Inputs (Level 3) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 98 | 111
Actual return on plan assets | (20) | (6)
Purchases, sales, settlements | (5) | (6)
Transfers in/out of Level 3 | 0 | 0
Foreign currency rate changes | (10) | (1)
Fair value of plan assets, end of year | 63 | 98
Cash & cash equivalents |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 19 |
Fair value of plan assets, end of year | 11 | 19
Cash & cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 19 |
Fair value of plan assets, end of year | 11 | 19
Cash & cash equivalents | Significant Other Observable Inputs (Level 2) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | 0 | 0
Cash & cash equivalents | Significant Unobservable Inputs (Level 3) |  |
Change in plan assets: |  |
Fair value of plan assets, beginning of year | 0 |
Fair value of plan assets, end of year | $ 0 | $ 0

X
- Definition Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held. + 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 (d)(iv)(02)(A) -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 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
Name: | us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + 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 (d)(iv)(01) -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 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 1 -Subparagraph (d)(ii) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: 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 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: 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 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan. + 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)(2) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, measured using unobservable input, of increase (decrease) in plan asset of defined benefit plan from purchase, sale and settlement of trade associated with underlying investment. + 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 (d)(iv)(02)(B) -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 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
Name: | us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan, for assets transferred into (out of) Level 3 of fair value hierarchy. Includes, but is not limited to, transfer due to change in observability of significant inputs. + 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 (d)(iv)(02)(C) -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 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
Name: | us-gaap_DefinedBenefitPlanTransfersBetweenMeasurementLevels
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

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

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

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