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Unredeemed Capital Expenditure and Tax Loss Carry Forwards (Detail) (South African Mining Operations, USD $) In Millions, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Operating Loss Carryforwards [Line Items] |  |
Unredeemed capital expenditure | $ 2,609.7 | $ 1,657.8
Gold Fields Operations |  |
Operating Loss Carryforwards [Line Items] |  |
Unredeemed capital expenditure | 724.3 | 608.4
GFI Joint Venture Holdings |  |
Operating Loss Carryforwards [Line Items] |  |
Unredeemed capital expenditure | $ 1,885.4 | $ 1,049.4

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- Definition The amount of the tax credit carryforward, 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 Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 17 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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