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Included in (Loss)/Profit Before Royalties and Taxation - Schedule of Amounts Included in (Loss)/Profit Before Royalties and Taxation (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of information about amounts included in profit before royalties and taxation [abstract]
Operating lease charges	$ (2.3)	$ (2.4)	$ (2.8)
Profit on buy-back of notes	0.0	0.0	17.7
Social contributions and sponsorships	(15.1)	(19.6)	(19.3)
Global compliance costs	0.0	0.0	(0.1)
Loss on sale of inventory	(8.9)	0.0	0.0
Rehabilitation income - continuing operations	0.9	13.5	9.7
Rehabilitation income - discontinued operations	0.0	0.0	0.2
Restructuring costs	$ (113.9)	$ (9.2)	$ (11.7)

X

- Definition

Disclosure of information about amounts included in profit before royalties and taxation.

+ References

No definition available.

+ Details

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Namespace Prefix:	gfi_
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Balance Type:	na
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X

- Definition

The amount of expenses relating to global compliance costs.

+ References

No definition available.

+ Details

Name:	gfi_GlobalComplianceCosts
Namespace Prefix:	gfi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Loss on sale of inventory

+ References

No definition available.

+ Details

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X

- Definition

Profit loss on buyback of notes.

+ References

No definition available.

+ Details

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X

- Definition

Rehabilitation income and/or expenses attributable to continuing operations.

+ References

No definition available.

+ Details

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Namespace Prefix:	gfi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Rehabilitation income and/or expenses attributable to discontinuing operations.

+ References

No definition available.

+ Details

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Balance Type:	credit
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X

- Definition

The amount of expenses relating to social contributions and sponsorships.

+ References

No definition available.

+ Details

Name:	gfi_SocialContributionsAndSponsorships
Namespace Prefix:	gfi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of expense relating to restructuring. Restructuring is a programme that is planned and controlled by management and materially changes either the scope of a business undertaken by an entity or the manner in which that business is conducted. Such programmes include: (a) the sale or termination of a line of business; (b) closure of business locations in a country or region or the relocation of activities from one country or region to another; (c) changes in management structure; and (d) fundamental reorganisations that have a material effect on the nature and focus of the entity's operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 98
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_98_b&doctype=Standard
-URIDate 2018-03-16

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X

- Definition

The portion of operating lease payments that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with any amounts guaranteed by the lessee or by a party related to the lessee recognised as an expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2019-01-01
-Name IAS
-Number 17
-IssueDate 2018-01-01
-Paragraph 35
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2018-03-02&anchor=para_35_c&doctype=Standard&book=b
-URIDate 2018-03-16

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