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Mining and Income Taxation - Summary of Domestic and Foreign Current Tax Rates (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Mining Tax [member]
Disclosure of Domestic and Foreign Current Tax Rate [Line Items]
Effective mining tax rate for Gold Fields Operations Limited, GFI Joint Venture Holdings (Proprietary) Limited and owners of South Deep Mine	29.00%	29.00%	29.00%

X

- Definition

Line item represents disclosure of domestic and foreign current tax rate.

+ References

No definition available.

+ Details

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

X

- Definition

Effective mining income tax rate.

+ References

No definition available.

+ Details

Name:	gfi_EffectiveMiningIncomeTaxRate
Namespace Prefix:	gfi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	gfi_IncomeTaxAuthority1Axis=gfi_MiningTaxMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: