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Finance Lease Liabilities - Summary of Finance Lease Liabilities (Parenthetical) (Detail) - Gruyere power purchase agreement [member] | 12 Months Ended
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Dec. 31, 2018
Disclosure of finance lease liabilities [line items] |
Term of contract | 15 years
Lease interest rate | 3.46%

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- Definition Contract period. + References No definition available. + Details
Name: | gfi_ContractPeriod
Namespace Prefix: | gfi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Disclosure of finance lease liabilities [line items] + References No definition available. + Details
Name: | gfi_DisclosureOfFinanceLeaseLiabilitiesLineItems
Namespace Prefix: | gfi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Finance lease interest rate. + References No definition available. + Details
Name: | gfi_FinanceLeaseInterestRate
Namespace Prefix: | gfi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | gfi_TypesOfAgreementAxis=gfi_GruyerePowerPurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |