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Valuation Allowance for Deferred Tax Assets (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010 | Jun. 30, 2010
--- | --- | --- | ---
Valuation Allowance [Line Items] |  |  |
Valuation allowance for deferred tax assets | $ 152.4 | $ 192.5 | $ 195.3
Orogen Investments SA (Luxembourg) |  |  |
Valuation Allowance [Line Items] |  |  |
Valuation allowance for deferred tax assets | 39.2 | 40.9 | 43.7
Gold Fields Arctic Platinum Oy |  |  |
Valuation Allowance [Line Items] |  |  |
Valuation allowance for deferred tax assets | 30.3 | 28.3 | 26.2
Living Gold (Pty) Limited |  |  |
Valuation Allowance [Line Items] |  |  |
Valuation allowance for deferred tax assets | 3.9 | 6.5 | 5.6
Gold Fields Operations |  |  |
Valuation Allowance [Line Items] |  |  |
Valuation allowance for deferred tax assets | 33.2 | 53.1 | 55.0
GFI Joint Venture Holdings |  |  |
Valuation Allowance [Line Items] |  |  |
Valuation allowance for deferred tax assets | 44.6 | 62.2 | 63.6
Other |  |  |
Valuation Allowance [Line Items] |  |  |
Valuation allowance for deferred tax assets | $ 1.2 | $ 1.5 | $ 1.2

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- Definition The sum of the portions of deferred tax assets as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 17 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43-49 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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