Accounts Receivable - Additional Information (Detail)	12 Months Ended
Dec. 31, 2012 Customer
Finance Receivable Transferred To Held For Sale [Line Items]
Company's Largest customers	10
Portion of ten largest customers in its total sales	46.00%
Number of customer accounted more than 10% of its net sales.	0

Number Of Customers Accounted For More Than Ten Percent Of Accounts Receivable

No definition available.

Name:	trox_NumberOfCustomersAccountedForMoreThanTenPercentOfAccountsReceivable
Namespace Prefix:	trox_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration