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Other Expenses - Summary of Other Expenses (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Components Of Other Expense [Line Items] |  |  |  |  |
Stamp duty and other costs on the acquisition of the Yilgarn South assets |  |  | $ 27.4 us-gaap_AcquisitionCosts |  |
Facility charges |  |  | 23.5 gfi_FacilityCharges | [1] |
Regulatory legal fees | 7.1 gfi_RegulatoryLegalFees | [2] | 11.1 gfi_RegulatoryLegalFees | [2] |
Other | 37.1 us-gaap_OtherNonoperatingExpense |  | 42.2 us-gaap_OtherNonoperatingExpense |  | 37.9 us-gaap_OtherNonoperatingExpense
Total other costs | $ 44.2 us-gaap_OtherNonoperatingIncomeExpense |  | $ 104.2 us-gaap_OtherNonoperatingIncomeExpense |  | $ 37.9 us-gaap_OtherNonoperatingIncomeExpense
[1] | Facility charges on cancellation of the $1 billion and $500 million facilities associated with the spin-off of Sibanye Gold in fiscal 2013.
[2] | Legal fees paid as a result of the Gold Fields Board examination and regulatory investigation relating to the South Deep Black Economic Empowerment transaction.

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- Definition Facility charges on cancellation of loan facilities. + References No definition available. + Details
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- Definition Legal fees paid as a result of the Board and regulatory investigation relating to the Black Economic Empowerment transaction. + References No definition available. + Details
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- Definition The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10.(c)(7)(ii)) -URI http://asc.fasb.org/extlink&oid=27015464&loc=d3e511914-122862 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 10 -Paragraph c -Subparagraph 3(ii)(A) -Article 4 + Details
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- Definition The aggregate amount of other expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating expense recognized during the period. Such amounts may include: (a) unusual costs, (b) loss on foreign exchange transactions, (c) losses on securities (net of profits), and (d) miscellaneous other expense items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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