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Share-Based Compensation Expense Available for Each Plan (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation | $ 26.0 us-gaap_AllocatedShareBasedCompensationExpense | $ 40.5 us-gaap_AllocatedShareBasedCompensationExpense | $ 45.5 us-gaap_AllocatedShareBasedCompensationExpense
Performance Shares |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |  |
Continuing operations |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation | 26.0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 40.5 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 45.5 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Continuing operations | The Gold Fields Limited 2012 Share Plan | Performance Shares |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation | 12.0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_PlanNameAxis = gfi_GoldFieldsLimitedTwoThousandAndTwelveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 18.8 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_PlanNameAxis = gfi_GoldFieldsLimitedTwoThousandAndTwelveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 13.1 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_PlanNameAxis = gfi_GoldFieldsLimitedTwoThousandAndTwelveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Continuing operations | The Gold Fields Limited 2012 Share Plan | Bonus Shares |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation | 12.3 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = gfi_BonusShareMember / us-gaap_PlanNameAxis = gfi_GoldFieldsLimitedTwoThousandAndTwelveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 11.9 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = gfi_BonusShareMember / us-gaap_PlanNameAxis = gfi_GoldFieldsLimitedTwoThousandAndTwelveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 8.7 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = gfi_BonusShareMember / us-gaap_PlanNameAxis = gfi_GoldFieldsLimitedTwoThousandAndTwelveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Continuing operations | The Gold Fields Limited 2005 Share Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation | 1.7 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = gfi_GfLimitedTwoThousandAndFiveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 9.8 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = gfi_GfLimitedTwoThousandAndFiveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 23.7 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = gfi_GfLimitedTwoThousandAndFiveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Discontinued operations |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 4.6 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 32.2 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Discontinued operations | The Gold Fields Limited 2012 Share Plan | Performance Shares |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation |  | 1.1 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_PlanNameAxis = gfi_GoldFieldsLimitedTwoThousandAndTwelveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 7.6 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_PlanNameAxis = gfi_GoldFieldsLimitedTwoThousandAndTwelveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Discontinued operations | The Gold Fields Limited 2012 Share Plan | Bonus Shares |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation |  | 0.8 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = gfi_BonusShareMember / us-gaap_PlanNameAxis = gfi_GoldFieldsLimitedTwoThousandAndTwelveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 5.0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = gfi_BonusShareMember / us-gaap_PlanNameAxis = gfi_GoldFieldsLimitedTwoThousandAndTwelveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Discontinued operations | The Gold Fields Limited 2005 Share Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation |  | $ 2.7 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = gfi_GfLimitedTwoThousandAndFiveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ 19.6 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = gfi_GfLimitedTwoThousandAndFiveSharePlanMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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