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Summary of Assets Held for Sale (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Long Lived Assets Held-for-sale [Line Items] |  |  |
Assets held for sale | $ 31.0 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent | $ 47.0 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent |
Arctic Platinum [Member] |  |  |
Long Lived Assets Held-for-sale [Line Items] |  |  |
Assets held for sale | 31.0 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = gfi_ArcticPlatinumMember | 31.0 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = gfi_ArcticPlatinumMember |
Yanfolila |  |  |
Long Lived Assets Held-for-sale [Line Items] |  |  |
Assets held for sale |  | $ 16.0 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = gfi_YanfolilaMember | [1],[2]
[1] | Refer to note 4 for details on the impairment in fiscal 2013.
[2] | Refer to note 3 for details on the disposal of Yanfolila during fiscal 2014.

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- Definition Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759 + Details
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