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Estimated Capital Allowances (Detail) (Total Mining Operations, USD $) In Millions, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010 | Jun. 30, 2010
--- | --- | --- | ---
Income Taxes [Line Items] |  |  |
Estimated assessed tax losses | $ 525.3 | $ 928.5 | $ 958.2
Gold Fields Operations |  |  |
Income Taxes [Line Items] |  |  |
Estimated assessed tax losses | 484.4 | 653.2 | 600.4
GFI Joint Venture Holdings |  |  |
Income Taxes [Line Items] |  |  |
Estimated assessed tax losses | 12.6 | 67.5 | 81.5
Gold Fields Australia (Pty) Limited |  |  |
Income Taxes [Line Items] |  |  |
Estimated assessed tax losses |  | 177.6 | 251.9
Gold Fields Group (excluding South Deep) |  |  |
Income Taxes [Line Items] |  |  |
Estimated assessed tax losses | 10.0 | 2.0 |
Golden Oils (Pty) Limited |  |  |
Income Taxes [Line Items] |  |  |
Estimated assessed tax losses | 1.2 | 1.4 | 1.0
Agrihold (Pty) Limited |  |  |
Income Taxes [Line Items] |  |  |
Estimated assessed tax losses | 1.9 | 2.3 | 2.1
Golden Hytec Farming (Pty) Limited |  |  |
Income Taxes [Line Items] |  |  |
Estimated assessed tax losses | 1.1 | 1.4 | 1.2
Living Gold (Pty) Limited |  |  |
Income Taxes [Line Items] |  |  |
Estimated assessed tax losses | $ 14.1 | $ 23.1 | $ 20.1

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- Definition The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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