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(Loss)/Earnings Per Share (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
BASIC (LOSS)/EARNINGS PER SHARE      
Net (loss)/income attributable to Gold Fields shareholders - Continuing operations $ (27.2)us-gaap_IncomeLossFromContinuingOperations $ (268.4)us-gaap_IncomeLossFromContinuingOperations $ 292.1us-gaap_IncomeLossFromContinuingOperations
Net (loss)/income attributable to Gold Fields shareholders - Discontinued operations 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity 20.5us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity [1],[2] 362.2us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity [1],[2]
Net (loss)/income attributable to Gold Fields shareholders (27.2)us-gaap_NetIncomeLoss (247.9)us-gaap_NetIncomeLoss 654.3us-gaap_NetIncomeLoss
Weighted average number of shares - continuing operations      
Shares outstanding - beginning of year 767,160,263us-gaap_CommonStockSharesOutstanding 729,536,813us-gaap_CommonStockSharesOutstanding 723,735,186us-gaap_CommonStockSharesOutstanding
Weighted average number of shares issued 1,981,608us-gaap_WeightedAverageNumberOfSharesIssuedBasic 13,069,913us-gaap_WeightedAverageNumberOfSharesIssuedBasic 3,724,271us-gaap_WeightedAverageNumberOfSharesIssuedBasic
Weighted average number of shares issued at the end of the year 769,141,871us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 742,606,726us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 727,459,457us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Basic (loss)/earnings per share - Continuing operations $ (0.04)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ (0.36)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.40us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Basic (loss)/earnings per share - Discontinued operations   $ 0.03us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare [1] $ 0.50us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare [1]
DILUTED (LOSS)/EARNINGS PER SHARE      
Net (loss)/income attributable to Gold Fields shareholders - Continuing operations (27.2)us-gaap_IncomeLossFromContinuingOperations (268.4)us-gaap_IncomeLossFromContinuingOperations 292.1us-gaap_IncomeLossFromContinuingOperations
Net (loss)/income attributable to Gold Fields shareholders - Discontinued operations 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity 20.5us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity [1],[2] 362.2us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity [1],[2]
Net (loss)/income attributable to Gold Fields shareholders $ (27.2)us-gaap_NetIncomeLoss $ (247.9)us-gaap_NetIncomeLoss $ 654.3us-gaap_NetIncomeLoss
Weighted average number of shares - continuing operations      
Weighted average number of shares issued at the end of the year 769,141,871gfi_WeightedAverageNumberOfSharesOutstandingContinuingOperationsBasic 742,606,726gfi_WeightedAverageNumberOfSharesOutstandingContinuingOperationsBasic 727,459,457gfi_WeightedAverageNumberOfSharesOutstandingContinuingOperationsBasic
Effect of dilutive securities     3,264,493us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment [3]
Weighted Average Number of Shares Outstanding, Diluted 769,141,871gfi_WeightedAverageNumberOfSharesOutstandingContinuingOperationsDiluted 742,606,726gfi_WeightedAverageNumberOfSharesOutstandingContinuingOperationsDiluted 730,723,950gfi_WeightedAverageNumberOfSharesOutstandingContinuingOperationsDiluted
Diluted (loss)/earnings per share - Continuing operations $ (0.04)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ (0.36)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.40us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Diluted (loss)/earnings per share - Discontinuing operations   $ 0.03us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare [2] $ 0.50us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare [2]
[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).
[3] Dilutive securities comprise the dilutive effect of share options. Refer note 18 for details of share option schemes. In fiscal 2014 and 2013, due to the loss from continuing operations, the effect of dilutive securities was not considered in the dilutive earnings per share calculation.