2.4.0.81095 - Disclosure - Share-Based Compensation - Assumptions Used in Calculating Options Granted (Detail)truefalsefalse1false falsefalseeol_PE864322--13S-4-0005_STD_23_20121112_0http://www.sec.gov/CIK0001530804duration2012-10-21T00:00:002012-11-12T00:00:00sharesStandardhttp://www.xbrl.org/2003/instanceshares02false falsefalseeol_PE864322--13S-4-0005_STD_26_20121026_0http://www.sec.gov/CIK0001530804duration2012-10-01T00:00:002012-10-26T00:00:00sharesStandardhttp://www.xbrl.org/2003/instanceshares03false USDfalsefalse$eol_PE864322--13S-4-0005_STD_26_20120626_0http://www.sec.gov/CIK0001530804duration2012-06-01T00:00:002012-06-26T00:00:00pureStandardhttp://www.xbrl.org/2003/instancepure0sharesStandardhttp://www.xbrl.org/2003/instanceshares0iso4217_USD_per_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares0USDUSD$4false USDfalsefalse$eol_PE864322--13S-4-0005_STD_31_20120606_0http://www.sec.gov/CIK0001530804duration2012-05-07T00:00:002012-06-06T00:00:00pureStandardhttp://www.xbrl.org/2003/instancepure0sharesStandardhttp://www.xbrl.org/2003/instanceshares0iso4217_USD_per_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares0USDUSD$5false USDfalsefalse$eol_PE864322--13S-4-0005_STD_31_20120102_0http://www.sec.gov/CIK0001530804duration2011-12-03T00:00:002012-01-02T00:00:00pureStandardhttp://www.xbrl.org/2003/instancepure0sharesStandardhttp://www.xbrl.org/2003/instanceshares0iso4217_USD_per_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares0USDUSD$6false USDtruefalse$eol_PE864322--13S-4-0005_STD_20_20130311_0_566507x794555_574847x568507_582032x580470http://www.sec.gov/CIK0001530804duration2013-02-20T00:00:002013-03-11T00:00:00falsefalseSuccessor [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_SuccessorMemberus-gaap_StatementScenarioAxisexplicitMemberfalsefalseTronox Limited Management Equity Incentive Plan [Member]us-gaap_PlanNameAxisxbrldihttp://xbrl.org/2006/xbrlditrox_TronoxLimitedManagementEquityIncentivePlanMemberus-gaap_PlanNameAxisexplicitMemberfalsefalseStock Options [Member]us-gaap_AwardTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_StockOptionsMemberus-gaap_AwardTypeAxisexplicitMemberpureStandardhttp://www.xbrl.org/2003/instancepure0sharesStandardhttp://www.xbrl.org/2003/instanceshares0iso4217_USD_per_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares0USDUSD$7false USDtruefalse$eol_PE864322--13S-4-0005_STD_25_20130225_0_566507x794555_574847x568507_582032x580470http://www.sec.gov/CIK0001530804duration2013-02-01T00:00:002013-02-25T00:00:00falsefalseSuccessor [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_SuccessorMemberus-gaap_StatementScenarioAxisexplicitMemberfalsefalseTronox Limited Management Equity Incentive Plan [Member]us-gaap_PlanNameAxisxbrldihttp://xbrl.org/2006/xbrlditrox_TronoxLimitedManagementEquityIncentivePlanMemberus-gaap_PlanNameAxisexplicitMemberfalsefalseStock Options [Member]us-gaap_AwardTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_StockOptionsMemberus-gaap_AwardTypeAxisexplicitMembersharesStandardhttp://www.xbrl.org/2003/instanceshares0pureStandardhttp://www.xbrl.org/2003/instancepure0iso4217_USD_per_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares0USDUSD$8false USDtruefalse$eol_PE864322--13S-4-0005_STD_23_20121112_0_566507x794555_574847x568507_582032x580470http://www.sec.gov/CIK0001530804duration2012-10-21T00:00:002012-11-12T00:00:00falsefalseSuccessor [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_SuccessorMemberus-gaap_StatementScenarioAxisexplicitMemberfalsefalseTronox Limited Management Equity Incentive Plan [Member]us-gaap_PlanNameAxisxbrldihttp://xbrl.org/2006/xbrlditrox_TronoxLimitedManagementEquityIncentivePlanMemberus-gaap_PlanNameAxisexplicitMemberfalsefalseStock Options [Member]us-gaap_AwardTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_StockOptionsMemberus-gaap_AwardTypeAxisexplicitMemberpureStandardhttp://www.xbrl.org/2003/instancepure0iso4217_USD_per_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares0USDUSD$9false USDtruefalse$eol_PE864322--13S-4-0005_STD_26_20121026_0_566507x794555_574847x568507_582032x580470http://www.sec.gov/CIK0001530804duration2012-10-01T00:00:002012-10-26T00:00:00falsefalseSuccessor [Member]us-gaap_StatementScenarioAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_SuccessorMemberus-gaap_StatementScenarioAxisexplicitMemberfalsefalseTronox Limited Management Equity Incentive Plan [Member]us-gaap_PlanNameAxisxbrldihttp://xbrl.org/2006/xbrlditrox_TronoxLimitedManagementEquityIncentivePlanMemberus-gaap_PlanNameAxisexplicitMemberfalsefalseStock Options [Member]us-gaap_AwardTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_StockOptionsMemberus-gaap_AwardTypeAxisexplicitMemberpureStandardhttp://www.xbrl.org/2003/instancepure0iso4217_USD_per_sharesDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instanceshares0USDUSD$1true 3us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]2false 4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrossus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse711711falsefalsefalse2truefalsefalse8823388233falsefalsefalse3truefalsefalse135895135895falsefalsefalse4truefalsefalse150000150000falsefalsefalse5truefalsefalse2233022330falsefalsefalse6truefalsefalse82388238falsefalsefalse7truefalsefalse15448721544872falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesGross number of share options (or share units) granted during the period.No definition available.false1Number of options granted3false 4trox_FairMarketValueAndExercisePricetrox_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse25.9025.90[1]USD$falsetruefalse4truefalsefalse30.4530.45USD$falsetruefalse5truefalsefalse24.6024.60USD$falsetruefalse6truefalsefalse21.4921.49USD$falsetruefalse7truefalsefalse19.0919.09USD$falsetruefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsenum:perShareItemTypedecimalFair market value and exercise price.No definition available.false3Fair market value and exercise price4false 4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3truetruefalse0.00970.0097[2]falsefalsefalse4truetruefalse0.00940.0094falsefalsefalse5truetruefalse0.01970.0197falsefalsefalse6truetruefalse0.01190.0119falsefalsefalse7truetruefalse0.01040.0104falsefalsefalse8truetruefalse0.00870.0087falsefalsefalse9truetruefalse0.01020.0102falsefalsefalsenum:percentItemTypepureThe risk-free interest rate assumption that is used in valuing an option on its own shares.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(d) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false0Risk-free interest rate5false 4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRateus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3truetruefalse0.03860.0386falsefalsefalse4truetruefalse0.0000.000falsefalsefalse5truetruefalse0.0000.000falsefalsefalse6truetruefalse0.04650.0465falsefalsefalse7truetruefalse0.05240.0524falsefalsefalse8truetruefalse0.05340.0534falsefalsefalse9truetruefalse0.04840.0484falsefalsefalsenum:percentItemTypepureThe estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false0Expected dividend yield6false 4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3truetruefalse0.550.55falsefalsefalse4truetruefalse0.550.55falsefalsefalse5truetruefalse0.490.49falsefalsefalse6truetruefalse0.560.56falsefalsefalse7truetruefalse0.560.56falsefalsefalse8truetruefalse0.560.56falsefalsefalse9truetruefalse0.560.56falsefalsefalsenum:percentItemTypepureThe estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false0Expected volatility7false 4trox_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMaturityTermtrox_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse0010 yearsfalsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse0010 yearsfalsefalsefalse7falsefalsefalse0010 yearsfalsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaShare Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Maturity TermNo definition available.false0Maturity (years)8false 4us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1us-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse006 yearsfalsefalsefalse4falsefalsefalse0010 yearsfalsefalsefalse5falsefalsefalse0010 yearsfalsefalsefalse6falsefalsefalse006 yearsfalsefalsefalse7falsefalsefalse006 yearsfalsefalsefalse8falsefalsefalse0010 yearsfalsefalsefalse9falsefalsefalse0010 yearsfalsefalsefalsexbrli:durationItemTypenaExpected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 false0Expected term (years)9false 4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse9.439.43USD$falsetruefalse4truefalsefalse15.6415.64USD$falsetruefalse5truefalsefalse14.7814.78USD$falsetruefalse6truefalsefalse7.487.48USD$falsetruefalse7truefalsefalse6.286.28USD$falsetruefalse8truefalsefalse6.076.07USD$falsetruefalse9truefalsefalse7.037.03USD$falsetruefalsenum:perShareItemTypedecimalThe weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 false3Per-unit fair value of options granted1The adjusted closing price of Class A Shares, New York Stock Exchange symbol TROX, on the grant date.2The risk-free interest rate was based on U.S. Treasury Strips available with maturity period consistent with expected life assumption.falseShare-Based Compensation - Assumptions Used in Calculating Options Granted (Detail) (USD $)UnKnownNoRoundingNoRoundingUnKnowntruefalsefalseSheethttp://imetrix.edgar-online.com/taxonomy/role/DisclosureShareBasedCompensationAssumptionsUsedInCalculatingOptionsGranted99