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Property, Plant and Equipment (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Cost	$ 7,453.4us-gaap_PropertyPlantAndEquipmentGross	$ 7,731.7us-gaap_PropertyPlantAndEquipmentGross
Accumulated depreciation and amortization	(3,000.1)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	(2,798.7)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property, plant and equipment, net	4,453.3us-gaap_PropertyPlantAndEquipmentNet	4,933.0us-gaap_PropertyPlantAndEquipmentNet
Cumulative capitalized interest, net of amortization	110.9gfi_CapitalizedInterestCostNetOfAmortization	103.9gfi_CapitalizedInterestCostNetOfAmortization
Tarkwa Mine
Property, Plant and Equipment [Line Items]
Cumulative capitalized interest, net of amortization	9.0gfi_CapitalizedInterestCostNetOfAmortization / us-gaap_StatementBusinessSegmentsAxis = gfi_TarkwaMineMember	10.9gfi_CapitalizedInterestCostNetOfAmortization / us-gaap_StatementBusinessSegmentsAxis = gfi_TarkwaMineMember
Cerro Corona
Property, Plant and Equipment [Line Items]
Cumulative capitalized interest, net of amortization	34.5gfi_CapitalizedInterestCostNetOfAmortization / us-gaap_StatementBusinessSegmentsAxis = gfi_CerroCoronaMember	43.0gfi_CapitalizedInterestCostNetOfAmortization / us-gaap_StatementBusinessSegmentsAxis = gfi_CerroCoronaMember
South Africa
Property, Plant and Equipment [Line Items]
Cumulative capitalized interest, net of amortization	67.4gfi_CapitalizedInterestCostNetOfAmortization / us-gaap_StatementGeographicalAxis = country_ZA	50.0gfi_CapitalizedInterestCostNetOfAmortization / us-gaap_StatementGeographicalAxis = country_ZA
Mining Properties, Mine Development Costs, Mine Plant Facilities and Mineral Interest
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	3,807.2us-gaap_PropertyPlantAndEquipmentNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gfi_MiningPropertiesMineDevelopmentCostsMinePlantFacilitiesAndMineralInterestMember	4,285.1us-gaap_PropertyPlantAndEquipmentNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gfi_MiningPropertiesMineDevelopmentCostsMinePlantFacilitiesAndMineralInterestMember
Asset Retirement Costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	105.7us-gaap_PropertyPlantAndEquipmentNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gfi_AssetRetirementCostsMember	89.3us-gaap_PropertyPlantAndEquipmentNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gfi_AssetRetirementCostsMember
Other Non-Mining Assets
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 540.4us-gaap_PropertyPlantAndEquipmentNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gfi_OtherNonMiningAssetsMember	$ 558.6us-gaap_PropertyPlantAndEquipmentNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = gfi_OtherNonMiningAssetsMember

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Cumulative interest incurred in respect of assets requiring a substantial period of time to prepare for their intended future use and are capitalized to the date that the assets are substantially completed.

+ References

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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