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Investments - Summary of Investments (Parenthetical) (Detail) $ / shares in Millions	Dec. 31, 2017 $ / shares
Disclosure of detailed information about investment property [abstract]
Common share purchase warrants	$ 10.0

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- Definition

Common share purchase warrants per share.

+ References

No definition available.

+ Details

Name:	gfi_CommonSharePurchaseWarrantsPerShare
Namespace Prefix:	gfi_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfInvestmentPropertyAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration