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Trade and other receivables - Collateral and other (Details) R in Millions	Jun. 30, 2021 ZAR (R) customer	Jun. 30, 2020 customer	Jun. 30, 2019 customer
Trade and other receivables
Number of customers representing more than ten percent of trade receivables | customer	0	0	0
Collateral held over trade receivables | R	R 0

X

- Definition

The fair value of collateral held that is permitted to be sold or repledged in the absence of default by the owner of the collateral. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph 15
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_15_a&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_AssetsHeldAsCollateralPermittedToBeSoldOrRepledgedAtFairValue
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- Definition

Number of customers representing more than ten percent of trade receivables

+ References

No definition available.

+ Details

Name:	ssl_NumberOfCustomersRepresentingMoreThanTenPercentOfTradeReceivables
Namespace Prefix:	ssl_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant