XML 120 R96.htm IDEA: XBRL DOCUMENT

Share-Based Compensation - Assumptions Used in Calculating Options Granted (Detail) (Successor, Tronox Limited Management Equity Incentive Plan, Stock Options, USD $)	1 Months Ended
	Mar. 11, 2013	Feb. 25, 2013	Nov. 12, 2012	Oct. 26, 2012
Successor \| Tronox Limited Management Equity Incentive Plan \| Stock Options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Risk-free interest rate	1.19%	1.04%	0.87%	1.02%
Expected dividend yield	4.65%	5.24%	5.34%	4.84%
Expected volatility	56.00%	56.00%	56.00%	56.00%
Expected term (years)	10 years	10 years	10 years	10 years
Per-unit fair value of options granted	$ 7.48	$ 6.28	$ 6.07	$ 7.03

The 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.

+ References+ Details