| r0.c0 | RuleNode_2/RuleNode_4 | | | |
| r1.c0 | Disclosure of summary of significant accounting policies [abstract]/RuleNode_4 | ssmt-mfrs:DisclosureOnSummaryOfSignificantAccountingPoliciesAbstract | xbrli:stringItemType | duration |
| r2.c0 | Disclosure of significant accounting policies [text block]/RuleNode_4 | ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory | nonnum:textBlockItemType | duration |
| r3.c0 | Description of accounting policy for biological assets [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForBiologicalAssetsExplanatory | nonnum:textBlockItemType | duration |
| r4.c0 | Description of accounting policy for borrowing costs [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForBorrowingCostsExplanatory | nonnum:textBlockItemType | duration |
| r5.c0 | Description of accounting policy for borrowings [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForBorrowingsExplanatory | nonnum:textBlockItemType | duration |
| r6.c0 | Description of accounting policy for business combinations [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory | nonnum:textBlockItemType | duration |
| r7.c0 | Description of accounting policy for cash and cash equivalents [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForCashFlowsExplanatory | nonnum:textBlockItemType | duration |
| r8.c0 | Description of accounting policy for commodity future and forward contracts [text block]/RuleNode_4 | ssmt-mfrs:DescriptionOfAccountingPolicyForCommodityFutureAndForwardContractsExplanatory | nonnum:textBlockItemType | duration |
| r9.c0 | Description of accounting policy for construction contracts [text block]/RuleNode_4 | ssmt-mfrs:DescriptionOfAccountingPolicyForConstructionContractExplanatory | nonnum:textBlockItemType | duration |
| r10.c0 | Description of accounting policy for construction in progress [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForConstructionInProgressExplanatory | nonnum:textBlockItemType | duration |
| r11.c0 | Description of accounting policy for contingent liabilities and contingent assets [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForContingentLiabilitiesAndContingentAssetsExplanatory | nonnum:textBlockItemType | duration |
| r12.c0 | Description of accounting policy for customer loyalty programmes [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForCustomerLoyaltyProgrammesExplanatory | nonnum:textBlockItemType | duration |
| r13.c0 | Description of accounting policy for decommissioning, restoration and rehabilitation provisions [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForDecommissioningRestorationAndRehabilitationProvisionsExplanatory | nonnum:textBlockItemType | duration |
| r14.c0 | Description of accounting policy for deferred income tax[text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory | nonnum:textBlockItemType | duration |
| r15.c0 | Description of accounting policy for depreciation expense [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForDepreciationExpenseExplanatory | nonnum:textBlockItemType | duration |
| r16.c0 | Description of accounting policy for derecognition of financial instruments [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForDerecognitionOfFinancialInstrumentsExplanatory | nonnum:textBlockItemType | duration |
| r17.c0 | Description of accounting policy for derivative financial instruments and hedging [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsAndHedgingExplanatory | nonnum:textBlockItemType | duration |
| r18.c0 | Description of accounting policy for discontinued operations [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForDiscontinuedOperationsExplanatory | nonnum:textBlockItemType | duration |
| r19.c0 | Description of accounting policy for dividend income [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForDividendsExplanatory | nonnum:textBlockItemType | duration |
| r20.c0 | Description of accounting policy for earnings per share [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory | nonnum:textBlockItemType | duration |
| r21.c0 | Description of accounting policy for emission rights [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForEmissionRightsExplanatory | nonnum:textBlockItemType | duration |
| r22.c0 | Description of accounting policy for equity instruments [text block]/RuleNode_4 | ssmt-mfrs:DescriptionOfAccountingPolicyForEquityInstrumentsExplanatory | nonnum:textBlockItemType | duration |
| r23.c0 | Description of accounting policy for exploration and development expenditures [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForExplorationAndEvaluationExpenditures | nonnum:textBlockItemType | duration |
| r24.c0 | Description of accounting policy for fair value measurement [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory | nonnum:textBlockItemType | duration |
| r25.c0 | Description of accounting policy for finance income and costs [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForFinanceIncomeAndCostsExplanatory | nonnum:textBlockItemType | duration |
| r26.c0 | Description of accounting policy for financial guarantee contracts [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForFinancialGuaranteesExplanatory | nonnum:textBlockItemType | duration |
| r27.c0 | Description of accounting policy for foreign currencies [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory | nonnum:textBlockItemType | duration |
| r28.c0 | Description of accounting policy for goodwill [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForGoodwillExplanatory | nonnum:textBlockItemType | duration |
| r29.c0 | Description of accounting policy for government grants [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForGovernmentGrants | nonnum:textBlockItemType | duration |
| r30.c0 | Description of accounting policy for impairment of financial assets [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory | nonnum:textBlockItemType | duration |
| r31.c0 | Description of accounting policy for impairment of other assets [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory | nonnum:textBlockItemType | duration |
| r32.c0 | Description of accounting policy for income tax [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory | nonnum:textBlockItemType | duration |
| r33.c0 | Description of accounting policy for initial recognition and subsequent measurement of financial instruments [text block]/RuleNode_4 | ssmt-mfrs:DescriptionOfAccountingPolicyForInitialRecognitionAndSubsequentMeasurementOfFinancialInstrumentsExplanatory | nonnum:textBlockItemType | duration |
| r34.c0 | Description of accounting policy for intangible assets other than goodwill [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory | nonnum:textBlockItemType | duration |
| r35.c0 | Description of accounting policy for interest income and expense [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForInterestIncomeAndExpenseExplanatory | nonnum:textBlockItemType | duration |
| r36.c0 | Description of accounting policy for inventories [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories | nonnum:textBlockItemType | duration |
| r37.c0 | Description of accounting policy for investment in associates [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForInvestmentInAssociates | nonnum:textBlockItemType | duration |
| r38.c0 | Description of accounting policy for investment property [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForInvestmentPropertyExplanatory | nonnum:textBlockItemType | duration |
| r39.c0 | Description of accounting policy for investments in joint arrangements [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForInvestmentsInJointVentures | nonnum:textBlockItemType | duration |
| r40.c0 | Description of accounting policy for investments in subsidiaries [text block]/RuleNode_4 | ssmt-mfrs:DescriptionOfAccountingPolicyForInvestmentInSubsidiariesExplanatory | nonnum:textBlockItemType | duration |
| r41.c0 | Description of accounting policy for irredeemable convertible unsecured loan stocks (“ICULS”) [text block]/RuleNode_4 | ssmt-mfrs:DescriptionOfAccountingPolicyForIrredemableCovertibleUnsecuredLoanStockExplanatory | nonnum:textBlockItemType | duration |
| r42.c0 | Description of accounting policy for leases [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory | nonnum:textBlockItemType | duration |
| r43.c0 | Description of accounting policy for long term employee benefits [text block]/RuleNode_4 | ssmt-mfrs:DescriptionOfAccountingPolicyForLongTermEmployeeBenefitsExplanatory | nonnum:textBlockItemType | duration |
| r44.c0 | Description of accounting policy for loss of control [text block]/RuleNode_4 | ssmt-mfrs:DescriptionOfAccountingPolicyForLossOfControlExplanatory | nonnum:textBlockItemType | duration |
| r45.c0 | Description of accounting policy for non-current assets or disposal group classified as held for sale [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory | nonnum:textBlockItemType | duration |
| r46.c0 | Description of accounting policy for offsetting of financial instruments [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForOffsettingOfFinancialInstrumentsExplanatory | nonnum:textBlockItemType | duration |
| r47.c0 | Description of accounting policy for operating segment reporting [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory | nonnum:textBlockItemType | duration |
| r48.c0 | Description of accounting policy for other financial instruments [text block]/RuleNode_4 | ssmt-mfrs:DescriptionOfAccountingPolicyForOtherFinancialLiabilitiesExplanatory | nonnum:textBlockItemType | duration |
| r49.c0 | Description of accounting policy for other provisions [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory | nonnum:textBlockItemType | duration |
| r50.c0 | Description of accounting policy for post-employment benefits [text block]/RuleNode_4 | ssmt-mfrs:DescriptionOfAccountingPolicyForPostEmploymentBenefitsExplanatory | nonnum:textBlockItemType | duration |
| r51.c0 | Description of accounting policy for property development costs [text block]/RuleNode_4 | ssmt-mfrs:DescriptionOfAccountingPolicyForPropertyDevelopmentCostsExplanatory | nonnum:textBlockItemType | duration |
| r52.c0 | Description of accounting policy for property, plant and equipment [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory | nonnum:textBlockItemType | duration |
| r53.c0 | Description of accounting policy for recognition of revenue and other income [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue | nonnum:textBlockItemType | duration |
| r54.c0 | Description of accounting policy for research and development expense [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory | nonnum:textBlockItemType | duration |
| r55.c0 | Description of accounting policy for share capital [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForIssuedCapitalExplanatory | nonnum:textBlockItemType | duration |
| r56.c0 | Description of accounting policy for share-based payment transactions [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory | nonnum:textBlockItemType | duration |
| r57.c0 | Description of accounting policy for short term employee benefits [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory | nonnum:textBlockItemType | duration |
| r58.c0 | Description of accounting policy for termination benefits [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForTerminationBenefits | nonnum:textBlockItemType | duration |
| r59.c0 | Description of accounting policy for transactions with non-controlling interests [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForTransactionsWithNoncontrollingInterestsExplanatory | nonnum:textBlockItemType | duration |
| r60.c0 | Description of accounting policy for transactions with related parties [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForTransactionsWithRelatedPartiesExplanatory | nonnum:textBlockItemType | duration |
| r61.c0 | Description of accounting policy for treasury shares [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForTreasurySharesExplanatory | nonnum:textBlockItemType | duration |
| r62.c0 | Description of accounting policy for warrants [text block]/RuleNode_4 | ifrs-full:DescriptionOfAccountingPolicyForWarrantsExplanatory | nonnum:textBlockItemType | duration |
| r63.c0 | Description of other significant accounting policies relevant to understanding of financial statements [text block]/RuleNode_4 | ssmt-mfrs:DescriptionOfAccountingPolicyForOtherSignificantAccountingPoliciesRelevantToUnderstandingOfFinancialStatementsExplanatory | nonnum:textBlockItemType | duration |