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Assets Held for Sale - Assets Held for Sale (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Assets Held For Sale [Line Items]
Total assets held for sale	$ 40.0	$ 26.4
Damang Mining Fleet and Related Spare [Member]
Assets Held For Sale [Line Items]
Total assets held for sale	0.0	26.4
APP [Member]
Assets Held For Sale [Line Items]
Total assets held for sale	$ 40.0	$ 0.0

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- Definition

Assets held for sale.

+ References

No definition available.

+ Details

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Namespace Prefix:	gfi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items for assets held for sale table.

+ References

No definition available.

+ Details

Name:	gfi_AssetsHeldForSaleLineItems
Namespace Prefix:	gfi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_ClassesOfAssetsAxis=gfi_DamangMiningFleetAndRelatedSpareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfAssetsAxis=gfi_AppMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: