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Segment Results and Assets (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating costs (excluding amortization and depreciation) | $ 1,684.9 gfi_IfrsOperatingCosts | [1],[2] | $ 1,678.7 gfi_IfrsOperatingCosts | [1],[3] | $ 1,673.8 gfi_IfrsOperatingCosts | [1],[4]
Corporate Expenditure [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating costs (excluding amortization and depreciation) | 27.3 gfi_IfrsOperatingCosts / us-gaap_IncomeStatementLocationAxis = gfi_CorporateExpenditureMember |  | 39.4 gfi_IfrsOperatingCosts / us-gaap_IncomeStatementLocationAxis = gfi_CorporateExpenditureMember |  | 38.2 gfi_IfrsOperatingCosts / us-gaap_IncomeStatementLocationAxis = gfi_CorporateExpenditureMember |
Environmental Rehabilitation [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating costs (excluding amortization and depreciation) | 15.4 gfi_IfrsOperatingCosts / us-gaap_IncomeStatementLocationAxis = gfi_EnvironmentalRehabilitationMember |  | 10.4 gfi_IfrsOperatingCosts / us-gaap_IncomeStatementLocationAxis = gfi_EnvironmentalRehabilitationMember |  | 13.9 gfi_IfrsOperatingCosts / us-gaap_IncomeStatementLocationAxis = gfi_EnvironmentalRehabilitationMember |
Employee Termination Costs [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating costs (excluding amortization and depreciation) | $ 42.2 gfi_IfrsOperatingCosts / us-gaap_IncomeStatementLocationAxis = gfi_EmployeeTerminationCostsMember |  | $ 35.5 gfi_IfrsOperatingCosts / us-gaap_IncomeStatementLocationAxis = gfi_EmployeeTerminationCostsMember |  | $ 6.1 gfi_IfrsOperatingCosts / us-gaap_IncomeStatementLocationAxis = gfi_EmployeeTerminationCostsMember |
[1] | This caption is based on captions used in the IFRS financial statements and does not reflect the US GAAP captions per the consolidated statement of operations.
[2] | Operating costs (excluding amortization and depreciation) for continuing operations for management reporting purposes includes: Corporate expenditure - $27.3 million, Accretion expense on provision for environmental rehabilitation - $15.4 million and Employee termination costs - $42.2 million, which are not included in production costs under U.S. GAAP. In addition, gold inventory change is included in production costs under U.S. GAAP.
[3] | Operating costs (excluding amortization and depreciation) for continuing operations for management reporting purposes includes: Corporate expenditure - $39.4 million, Accretion expense on provision for environmental rehabilitation - $10.4 million and Employee termination costs - $35.5 million, which are not included in production costs under U.S. GAAP. In addition, gold inventory change is included in production costs under U.S. GAAP.
[4] | Operating costs (excluding amortization and depreciation) for continuing operations for management reporting purposes includes: Corporate expenditure - $38.2 million, Accretion expense on provision for environmental rehabilitation - $13.9 million and Employee termination costs - $6.1 million, which are not included in production costs under U.S. GAAP. In addition, gold inventory change is included in production costs under U.S. GAAP.

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- Definition Ifrs Operating Costs + References No definition available. + Details
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