XML 374 R112.htm IDEA: XBRL DOCUMENT
v3.21.1

Exploration Expense - Summary of exploration expenses (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of geographical areas [line items] |  |  |
Expense arising from exploration for and evaluation of mineral resources | $ (49.7) | $ (84.4) | $ (104.2)
Australia |  |  |
Disclosure of geographical areas [line items] |  |  |
Expense arising from exploration for and evaluation of mineral resources | (16.9) | (30.0) | (37.7)
Ghana |  |  |
Disclosure of geographical areas [line items] |  |  |
Expense arising from exploration for and evaluation of mineral resources | 0.0 | 0.0 | (0.4)
Peru |  |  |
Disclosure of geographical areas [line items] |  |  |
Expense arising from exploration for and evaluation of mineral resources | (1.4) | (4.4) | (1.1)
Chile |  |  |
Disclosure of geographical areas [line items] |  |  |
Expense arising from exploration for and evaluation of mineral resources | (30.1) | (49.1) | (61.5)
Other |  |  |
Disclosure of geographical areas [line items] |  |  |
Expense arising from exploration for and evaluation of mineral resources | $ (1.3) | $ (0.9) | $ (3.5)

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

X
- Definition The amount of expense arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2020-01-01 -Paragraph 24 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2020-en-r&anchor=para_24_b&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ExpenseArisingFromExplorationForAndEvaluationOfMineralResources
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=gfi_AuMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=gfi_GhMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=gfi_PeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=gfi_ClMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=gfi_OtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |