| r0.c0 | RuleNode_2/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_2/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Statement of income and expenditure [abstract]/Group [member] | ssmt:StatementOfIncomeAndExpenditureAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Statement of income and expenditure [abstract]/Company [member] | ssmt:StatementOfIncomeAndExpenditureAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Continuing operations [abstract]/Group [member] | ssmt-mfrs:ContinuingOperationsAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r2.c1 | Continuing operations [abstract]/Company [member] | ssmt-mfrs:ContinuingOperationsAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r3.c0 | Income/Group [member] | ssmt-mfrs:Income | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Income/Company [member] | ssmt-mfrs:Income | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Cost of Sales/Group [member] | ifrs-full:CostOfSales | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Cost of Sales/Company [member] | ifrs-full:CostOfSales | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Gross profit/Group [member] | ifrs-full:GrossProfit | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Gross profit/Company [member] | ifrs-full:GrossProfit | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r6.c0 | Other income/Group [member] | ifrs-full:OtherIncome | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r6.c1 | Other income/Company [member] | ifrs-full:OtherIncome | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r7.c0 | Administrative expenses/Group [member] | ifrs-full:AdministrativeExpense | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r7.c1 | Administrative expenses/Company [member] | ifrs-full:AdministrativeExpense | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r8.c0 | Government contribution/Group [member] | ssmt-mfrs:GovernmentContribution | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r8.c1 | Government contribution/Company [member] | ssmt-mfrs:GovernmentContribution | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r9.c0 | Other expenses/Group [member] | ifrs-full:OtherExpenseByFunction | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r9.c1 | Other expenses/Company [member] | ifrs-full:OtherExpenseByFunction | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r10.c0 | Operating profit/Group [member] | ssmt-mfrs:OperatingProfit | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r10.c1 | Operating profit/Company [member] | ssmt-mfrs:OperatingProfit | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r11.c0 | Finance income/Group [member] | ifrs-full:FinanceIncome | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r11.c1 | Finance income/Company [member] | ifrs-full:FinanceIncome | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r12.c0 | Finance costs/Group [member] | ifrs-full:FinanceCosts | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r12.c1 | Finance costs/Company [member] | ifrs-full:FinanceCosts | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r13.c0 | Share of profit (loss) of associates and joint ventures accounted for using equity method/Group [member] | ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r13.c1 | Share of profit (loss) of associates and joint ventures accounted for using equity method/Company [member] | ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r14.c0 | Surplus (deficit) of income over expenditure before taxation/Group [member] | ifrs-full:ProfitLossBeforeTax | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r14.c1 | Surplus (deficit) of income over expenditure before taxation/Company [member] | ifrs-full:ProfitLossBeforeTax | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r15.c0 | Taxation expense/Group [member] | ifrs-full:IncomeTaxExpenseContinuingOperations | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r15.c1 | Taxation expense/Company [member] | ifrs-full:IncomeTaxExpenseContinuingOperations | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r16.c0 | Surplus (deficit) of income over expenditure from continuing operations/Group [member] | ifrs-full:ProfitLossFromContinuingOperations | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r16.c1 | Surplus (deficit) of income over expenditure from continuing operations/Company [member] | ifrs-full:ProfitLossFromContinuingOperations | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r17.c0 | Discontinued operations [abstract]/Group [member] | ssmt-mfrs:DiscontinuedOperationsAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r17.c1 | Discontinued operations [abstract]/Company [member] | ssmt-mfrs:DiscontinuedOperationsAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r18.c0 | Surplus (deficit) from discontinued operations, net of tax/Group [member] | ifrs-full:ProfitLossFromDiscontinuedOperations | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r18.c1 | Surplus (deficit) from discontinued operations, net of tax/Company [member] | ifrs-full:ProfitLossFromDiscontinuedOperations | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r19.c0 | Surplus (deficit)/Group [member] | ifrs-full:ProfitLoss | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r19.c1 | Surplus (deficit)/Company [member] | ifrs-full:ProfitLoss | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r20.c0 | Surplus (deficit), attributable to [abstract]/Group [member] | ifrs-full:ProfitLossAttributableToAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r20.c1 | Surplus (deficit), attributable to [abstract]/Company [member] | ifrs-full:ProfitLossAttributableToAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r21.c0 | Surplus (deficit), attributable to members of company/Group [member] | ifrs-full:ProfitLossAttributableToOwnersOfParent | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r21.c1 | Surplus (deficit), attributable to members of company/Company [member] | ifrs-full:ProfitLossAttributableToOwnersOfParent | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r22.c0 | Surplus (deficit), attributable to non-controlling interests/Group [member] | ifrs-full:ProfitLossAttributableToNoncontrollingInterests | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r22.c1 | Surplus (deficit), attributable to non-controlling interests/Company [member] | ifrs-full:ProfitLossAttributableToNoncontrollingInterests | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r23.c0 | Total surplus (deficit)/Group [member] | ifrs-full:ProfitLoss | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r23.c1 | Total surplus (deficit)/Company [member] | ifrs-full:ProfitLoss | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r24.c0 | Other comprehensive income (expense), net of tax [Abstract]/Group [member] | ifrs-full:OtherComprehensiveIncomeAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r24.c1 | Other comprehensive income (expense), net of tax [Abstract]/Company [member] | ifrs-full:OtherComprehensiveIncomeAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r25.c0 | Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract]/Group [member] | ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r25.c1 | Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract]/Company [member] | ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r26.c0 | Gains (losses) on exchange differences on translation, net of tax/Group [member] | ssmt-mfrs:OtherComprehensiveIncomeNetOfTaxGainLossesOnExchangeDifferencesTranslation | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r26.c1 | Gains (losses) on exchange differences on translation, net of tax/Company [member] | ssmt-mfrs:OtherComprehensiveIncomeNetOfTaxGainLossesOnExchangeDifferencesTranslation | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r27.c0 | Other comprehensive income, net of tax, gains (losses) on revaluation/Group [member] | ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRevaluation | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r27.c1 | Other comprehensive income, net of tax, gains (losses) on revaluation/Company [member] | ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRevaluation | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r28.c0 | Remeasurement of defined benefit liability/Group [member] | ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r28.c1 | Remeasurement of defined benefit liability/Company [member] | ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r29.c0 | Other comprehensive income, net of tax, gains (losses) on other items/Group [member] | ssmt-mfrs:OtherComprehensiveIncomeNetOfTaxOtherEquityInstrumentsThatWillNotBeReclassifiedToProfitOrLoss | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r29.c1 | Other comprehensive income, net of tax, gains (losses) on other items/Company [member] | ssmt-mfrs:OtherComprehensiveIncomeNetOfTaxOtherEquityInstrumentsThatWillNotBeReclassifiedToProfitOrLoss | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r30.c0 | Total other comprehensive income that will not be reclassified to profit or loss, net of tax/Group [member] | ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r30.c1 | Total other comprehensive income that will not be reclassified to profit or loss, net of tax/Company [member] | ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r31.c0 | Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract]/Group [member] | ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r31.c1 | Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract]/Company [member] | ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r32.c0 | Gains (losses) on exchange differences on translation, net of tax/Group [member] | ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r32.c1 | Gains (losses) on exchange differences on translation, net of tax/Company [member] | ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r33.c0 | Gains (losses) on cash flow hedges, net of tax/Group [member] | ifrs-full:GainsLossesOnCashFlowHedgesNetOfTax | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r33.c1 | Gains (losses) on cash flow hedges, net of tax/Company [member] | ifrs-full:GainsLossesOnCashFlowHedgesNetOfTax | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r34.c0 | Gains (losses) on hedges of net investments in foreign operations, net of tax/Group [member] | ifrs-full:GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r34.c1 | Gains (losses) on hedges of net investments in foreign operations, net of tax/Company [member] | ifrs-full:GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r35.c0 | Gains (losses) on financial assets measured at fair value through other comprehensive income, net of tax/Group [member] | ifrs-full:GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r35.c1 | Gains (losses) on financial assets measured at fair value through other comprehensive income, net of tax/Company [member] | ifrs-full:GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r36.c0 | Other comprehensive income, net of tax, gains (losses) on other items/Group [member] | ssmt-mfrs:OtherComprehensiveIncomeNetOfTaxOtherEquityInstrumentsThatWillBeReclassifiedToProfitOrLoss | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r36.c1 | Other comprehensive income, net of tax, gains (losses) on other items/Company [member] | ssmt-mfrs:OtherComprehensiveIncomeNetOfTaxOtherEquityInstrumentsThatWillBeReclassifiedToProfitOrLoss | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r37.c0 | Total other comprehensive income that will be reclassified to profit or loss, net of tax/Group [member] | ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r37.c1 | Total other comprehensive income that will be reclassified to profit or loss, net of tax/Company [member] | ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r38.c0 | Total other comprehensive surplus (deficit)/Group [member] | ifrs-full:OtherComprehensiveIncome | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r38.c1 | Total other comprehensive surplus (deficit)/Company [member] | ifrs-full:OtherComprehensiveIncome | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r39.c0 | Total comprehensive surplus (deficit)/Group [member] | ifrs-full:ComprehensiveIncome | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r39.c1 | Total comprehensive surplus (deficit)/Company [member] | ifrs-full:ComprehensiveIncome | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r40.c0 | Comprehensive surplus (deficit) attributable to [abstract]/Group [member] | ifrs-full:ComprehensiveIncomeAttributableToAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r40.c1 | Comprehensive surplus (deficit) attributable to [abstract]/Company [member] | ifrs-full:ComprehensiveIncomeAttributableToAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r41.c0 | Comprehensive surplus (deficit), attributable to owners/Group [member] | ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r41.c1 | Comprehensive surplus (deficit), attributable to owners/Company [member] | ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r42.c0 | Comprehensive surplus (deficit), attributable to non-controlling interests/Group [member] | ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r42.c1 | Comprehensive surplus (deficit), attributable to non-controlling interests/Company [member] | ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r43.c0 | Total comprehensive surplus (deficit)/Group [member] | ifrs-full:ComprehensiveIncome | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r43.c1 | Total comprehensive surplus (deficit)/Company [member] | ifrs-full:ComprehensiveIncome | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |