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(Loss)/Earnings Per Share - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Earnings Per Common Share [Line Items] |  |  |  |  |
Net (loss)/income attributable to Gold Fields shareholders - Discontinued operations | $ 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | $ 20.5 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | [1],[2] | $ 362.2 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | [1],[2]
Weighted average number of shares issued at the end of the year | 769,141,871 gfi_WeightedAverageNumberOfSharesOutstandingDiscontinuedOperationsBasic | 742,606,726 gfi_WeightedAverageNumberOfSharesOutstandingDiscontinuedOperationsBasic |  | 727,459,457 gfi_WeightedAverageNumberOfSharesOutstandingDiscontinuedOperationsBasic |
Weighted average number of diluted shares issued at the end of the year | 769,141,871 gfi_WeightedAverageNumberOfSharesOutstandingDiscontinuedOperationsDiluted | 742,606,726 gfi_WeightedAverageNumberOfSharesOutstandingDiscontinuedOperationsDiluted |  | 730,723,950 gfi_WeightedAverageNumberOfSharesOutstandingDiscontinuedOperationsDiluted |
[1] | Basic earnings per share from discontinued operations Basic earnings per share is calculated by dividing the profit attributable to ordinary shareholders from discontinued operations of $nil (fiscal 2013: $20.5 million and fiscal 2012: $362.2 million) by the weighted average number of ordinary shares in issue in fiscal 2014 of 769,141,871 (fiscal 2013: 742,606,726 and fiscal 2012: 727,459,457).
[2] | Diluted earnings per share from discontinued operations Diluted earnings per share is calculated on the basis of profit attributable to ordinary shareholders from discontinued operations of $nil (fiscal 2013: $20.5 million and fiscal 2012: $362.2 million) and 769,141,871 shares, being the diluted number of ordinary shares in issue in fiscal 2014 (fiscal 2013: 742,606,726 and fiscal 2012: 730,723,950).

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- Definition Weighted Average Number Of Shares Outstanding Discontinued Operations Basic + References No definition available. + Details
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- Definition Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 + Details
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