Percentage of voting equity interests acquired in the business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Name:	us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Segment Information - Additional Information (Detail)	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Exxaro [Member]
Segment Reporting Information [Line Items]
Acquisition of South African mineral sands operations, including its Namakwa and KwaZulu-Natal ("KZN") Sands mines	74.00%	74.00%	74.00%
Tiwest Joint Venture [Member]
Segment Reporting Information [Line Items]
Percentage of outstanding voting securities of Tronox Limited	50.00%	50.00%