Share-Based Compensation - Assumptions Used in Calculating Options Granted (Detail) (Successor [Member], Tronox Limited Management Equity Incentive Plan, Stock Options, USD $)	1 Months Ended	9 Months Ended
	Aug. 31, 2012	Sep. 30, 2012
Successor [Member] | Tronox Limited Management Equity Incentive Plan | Stock Options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Risk-free interest rate	0.85%	0.83%
Expected dividend yield	3.88%	4.32%
Expected volatility	56.00%	56.00%
Expected term (years)	10 years	10 years
Per-unit fair value of options granted	$ 9.51	$ 8.21