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Financial risk management and financial instruments - Foreign Currency Risk (Details) - Foreign exchange zero cost collars | 12 Months Ended
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Jun. 30, 2024
Financial risk management and financial instruments |
Period of foreign currency exposure hedged | 12 months
Maximum |
Financial risk management and financial instruments |
Maturity period of derivatives | 1 year

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The maturity period for most of the specified type of derivatives. + References No definition available. + Details
Name: | ssl_MaturityPeriodOfDerivativeContract
Namespace Prefix: | ssl_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The period of foreign currency exposure in respect of forecast sales and purchases hedged by the group at any point in time. + References No definition available. + Details
Name: | ssl_PeriodOfForeignCurrencyExposureHedged
Namespace Prefix: | ssl_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=ssl_ForeignExchangeZeroCostCollarsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |