Name:	ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
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Period Type:	duration

The gains (losses) excluding exchange differences, recognised in profit or loss, on the fair value measurement of liabilities. [Refer: At fair value [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 13
-IssueDate 2019-01-01
-Paragraph 93
-Subparagraph e
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2019-en-r&anchor=para_93_e_i&doctype=Standard
-URIDate 2019-03-27

Name:	ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

The gains (losses) on exchange differences, recognised in profit or loss, on the fair value measurement of liabilities. [Refer: At fair value [member]]

Name:	ifrs-full_GainsLossesRecognisedInProfitOrLossOnExchangeDifferencesFairValueMeasurementLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

The amount of liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Share-based payment arrangements [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2019-01-01
-Paragraph 51
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_51_b_i&doctype=Standard
-URIDate 2019-03-27

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of increase in the liability for share-based payments recognized as current expense in profit or loss.

No definition available.

Name:	sbgl_IncreaseInLiabilityForShareBasedPaymentsRecognizedInProfitOrLoss
Namespace Prefix:	sbgl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The amount of current liabilities arising from share-based payment transactions.

No definition available.

Name:	sbgl_LiabilitiesFromShareBasedPaymentTransactionsCurrent
Namespace Prefix:	sbgl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of non-current liabilities arising from share-based payment transactions.

No definition available.

Name:	sbgl_LiabilitiesFromShareBasedPaymentTransactionsNoncurrent
Namespace Prefix:	sbgl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of decrease in the liability for share-based payments resulting from payments made upon vesting of shares to employees.

No definition available.

Name:	sbgl_LiabilityForShareBasedPaymentsDecreaseFromVestingOfShares
Namespace Prefix:	sbgl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of increase in the liability for share-based payments attributable to acquisitions during the period.

No definition available.