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Summary of Chucapaca's Assets and Liabilities Sold (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Noncontrolling interest | $ 96.6 us-gaap_MinorityInterest | $ 103.8 us-gaap_MinorityInterest |
Profit on disposal | 78.0 us-gaap_GainLossOnSaleOfOtherInvestments | 17.8 us-gaap_GainLossOnSaleOfOtherInvestments | 27.6 us-gaap_GainLossOnSaleOfOtherInvestments
Chucapaca |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Net assets disposed of | 8.7 gfi_DisposalGroupIncludingDiscontinuedOperationNetAssets / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gfi_ChucapacaMember |  |
Noncontrolling interest | 0.5 us-gaap_MinorityInterest / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gfi_ChucapacaMember |  |
Cash received | 81.0 us-gaap_ProceedsFromSaleOfEquityMethodInvestments / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gfi_ChucapacaMember |  |
Profit on disposal | $ 72.8 us-gaap_GainLossOnSaleOfOtherInvestments / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gfi_ChucapacaMember |  |

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- Definition The difference between the book value and the sale price of other nonspecific investments. This element is used when other, more specific, elements are not appropriate. This element refers to the gain (loss) included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 27 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 7 + Details
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- Definition The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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