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Earnings Per Share, Computation of Anti-Dilutive Shares (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Warrant conversion rate (in shares) 5.29us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight 5.18us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight  
Options [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive shares not recognized in the diluted earnings per share calculation (in shares) 2,560,875us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember		 2,094,771us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember		 612,439us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
Anti-dilutive shares not recognized in the diluted earnings per share calculation, average exercise price (in dollars per share) $ 21.14trox_AverageExercisePriceOfAntidilutiveSecurities
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember		 $ 20.63trox_AverageExercisePriceOfAntidilutiveSecurities
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember		 $ 24.81trox_AverageExercisePriceOfAntidilutiveSecurities
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
Series A Warrants [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive shares not recognized in the diluted earnings per share calculation (in shares) 1,273,917us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= trox_SeriesAWarrantsMember		 [1] 1,850,814us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= trox_SeriesAWarrantsMember		 [1] 0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= trox_SeriesAWarrantsMember		 [1]
Anti-dilutive shares not recognized in the diluted earnings per share calculation, average exercise price (in dollars per share) $ 11.04trox_AverageExercisePriceOfAntidilutiveSecurities
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= trox_SeriesAWarrantsMember		 [1] $ 11.52trox_AverageExercisePriceOfAntidilutiveSecurities
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= trox_SeriesAWarrantsMember		 [1] $ 0trox_AverageExercisePriceOfAntidilutiveSecurities
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= trox_SeriesAWarrantsMember		 [1]
Series B Warrants [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive shares not recognized in the diluted earnings per share calculation (in shares) 1,715,986us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= trox_SeriesBWarrantsMember		 [1] 2,409,404us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= trox_SeriesBWarrantsMember		 [1] 0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= trox_SeriesBWarrantsMember		 [1]
Anti-dilutive shares not recognized in the diluted earnings per share calculation, average exercise price (in dollars per share) $ 12.19trox_AverageExercisePriceOfAntidilutiveSecurities
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= trox_SeriesBWarrantsMember		 [1] $ 12.71trox_AverageExercisePriceOfAntidilutiveSecurities
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= trox_SeriesBWarrantsMember		 [1] $ 0trox_AverageExercisePriceOfAntidilutiveSecurities
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= trox_SeriesBWarrantsMember		 [1]
Restricted Stock Units (RSUs) [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive shares not recognized in the diluted earnings per share calculation (in shares) 875,776us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockUnitsRSUMember		 303,324us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockUnitsRSUMember		 18,990us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockUnitsRSUMember
Anti-dilutive shares not recognized in the diluted earnings per share calculation, average exercise price (in dollars per share) $ 22.17trox_AverageExercisePriceOfAntidilutiveSecurities
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockUnitsRSUMember		 $ 21.08trox_AverageExercisePriceOfAntidilutiveSecurities
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockUnitsRSUMember		 $ 21.10trox_AverageExercisePriceOfAntidilutiveSecurities
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockUnitsRSUMember
[1] Series A Warrants and Series B Warrants were converted into Class A Shares at December 31, 2014 and 2013 using a rate of 5.29 and 5.18, respectively. See Note 20.