XML 369 R107.htm IDEA: XBRL DOCUMENT
v3.21.1

Share-Based Payments - Summary of Share Based Payment Performance Condition (Parenthetical) (Detail) | 12 Months Ended
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Dec. 31, 2020
Absolute Total Shareholder Return ("TSR") [member] |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Compounded annual growth rate index trading days | 60 trading days
Relative TSR [member] |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Compounded annual growth rate index trading days | 60 trading days

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- Definition Compounded annual growth rate index trading days. + References No definition available. + Details
Name: | gfi_CompoundedAnnualGrowthRateIndexTradingDays
Namespace Prefix: | gfi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- 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_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | gfi_PerformanceConditionAxis=gfi_AbsoluteTsrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | gfi_PerformanceConditionAxis=gfi_RelativeTSRMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |