Acquisition of the mineral sands business - Supplemental Pro Forma Financial Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Net Sales	$ 588	$ 1,150	$ 2,120	$ 2,302
Income from Operations	196	395	296	407
Net Income	173	326	239	2,105
Net Income attributable to Tronox Limited Shareholders	$ 156	$ 294	$ 207	$ 2,051
Basic earnings per share attributable to Tronox Limited Shareholders	$ 2.05	$ 4.07	$ 1.70	$ 16.29
Diluted earnings per share attributable to Tronox Limited Shareholders	$ 1.98	$ 3.92	$ 1.67	$ 15.91

Business acquisition pro forma net income attributable to parent.

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- Definition

Business acquisition, pro forma operating income loss.

+ References

No definition available.

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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