XML 403 R141.htm IDEA: XBRL DOCUMENT
v3.21.1

Interest in Joint Operation - Additional Information (Detail) - Gruyere Gold project [member] oz in Millions, $ in Millions, $ in Millions |  | 12 Months Ended
--- | --- | ---
Dec. 13, 2016 | Dec. 31, 2018 USD ($) oz | Dec. 31, 2018 AUD ($) oz | Dec. 31, 2017 AUD ($) | Dec. 31, 2016 AUD ($)
Disclosure of joint operations [line items] |  |  |  |  |
Percentage of ownership in joint operation: Gruyere Gold project | 50.00% |  |  |  |
Proportion of ownership interest in joint venture with Gold Road Resources |  | 50.00% | 50.00% |  |
Acquisition date fair value of total consideration transferred |  |  | $ 350.0 |  |
Percentage of royalty |  |  | 1.50% |  |
Share of production after total mine production in ounces | oz |  | 2 | 2 |  |
Cash Consideration paid on effective date |  |  | $ 250.0 |  |
Deferred Payment |  |  | 100.0 |  |
Transaction costs incurred |  | $ 13.3 | 18.5 |  |
Cash consideration - deferred payment paid |  |  | $ 15.0 | $ 78.0 | $ 7.0

X
- Definition Acquisition date fair value joint venture. + References No definition available. + Details
Name: | gfi_AcquisitionDateFairValueJointVenture
Namespace Prefix: | gfi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash consideration deferred payment paid. + References No definition available. + Details
Name: | gfi_CashConsiderationDeferredPaymentPaid
Namespace Prefix: | gfi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Consideration paid joint operation. + References No definition available. + Details
Name: | gfi_ConsiderationPaidJointOperation
Namespace Prefix: | gfi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Deferred payment. + References No definition available. + Details
Name: | gfi_DeferredPayment
Namespace Prefix: | gfi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of royalty payable. + References No definition available. + Details
Name: | gfi_PercentageOfRoyaltyPayable
Namespace Prefix: | gfi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Production in ounces. + References No definition available. + Details
Name: | gfi_ProductionInOunces
Namespace Prefix: | gfi_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition Transaction costs joint operation. + References No definition available. + Details
Name: | gfi_TransactionCostsJointOperation
Namespace Prefix: | gfi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_DisclosureOfJointOperationsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportion of ownership interest in a joint operation attributable to the entity. [Refer: Joint operations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph 21 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_21_a_iv&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestInJointOperation
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportion of ownership interest in a joint venture attributable to the entity. [Refer: Joint ventures [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2020-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2020-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph 21 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_21_a_iv&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestInJointVenture
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_JointVenturesAxis=gfi_GruyereGoldProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |