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Inventories - Schedule of Inventories (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of inventories [line items] |  |  |
Cost of sales of consumable stores | $ 346.7 | $ 346.3 | $ 380.7
Non-Current Assets Held for Sale [member] |  |  |
Disclosure of inventories [line items] |  |  |
Consumable stores fair value reclassified to assets held for sale |  | $ 7.8 |

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- Definition Cost of consumable stores included in cost of sales. + References No definition available. + Details
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Namespace Prefix: | gfi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References No definition available. + Details
Name: | gfi_DisclosureOfInventoriesLineItems
Namespace Prefix: | gfi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Inventories reclassified to non current assets held for sale. + References No definition available. + Details
Name: | gfi_InventoriesReclassifiedToNonCurrentAssetsHeldForSale
Namespace Prefix: | gfi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | ifrs-full_ClassesOfAssetsAxis=ifrs-full_NoncurrentAssetsHeldForSaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |