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Accounting Policies - Expected Useful Lives of Depreciation of Non-mining Assets (Detail)	12 Months Ended
	Dec. 31, 2018
Vehicles [member]
Disclosure of detailed information about property, plant and equipment [line items]
Expected useful lives percentage	20.00%
Computer [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Expected useful lives percentage	33.30%
Furniture and Equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Expected useful lives percentage	10.00%

X

- Definition

Rate Of Depreciation Of Non Mining Assets

+ References

No definition available.

+ Details

Name:	gfi_RateOfDepreciationOfNonMiningAssets
Namespace Prefix:	gfi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_VehiclesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_ComputerEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=gfi_FurnitureAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: