| r0.c0 | RuleNode_497/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_497/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Trade and other current payables [abstract]/Group [member] | ifrs-full:TradeAndOtherCurrentPayablesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Trade and other current payables [abstract]/Company [member] | ifrs-full:TradeAndOtherCurrentPayablesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Current trade payables [abstract]/Group [member] | ssmt-mfrs:CurrentTradePayablesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r2.c1 | Current trade payables [abstract]/Company [member] | ssmt-mfrs:CurrentTradePayablesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r3.c0 | Trade payables/Group [member] | ssmt-mfrs:CurrentTradePayablesDueToCustomers | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Trade payables/Company [member] | ssmt-mfrs:CurrentTradePayablesDueToCustomers | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Trade payables due to contract customers/Group [member] | ssmt-mfrs:CurrentTradePayableDueToContractCustomer | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Trade payables due to contract customers/Company [member] | ssmt-mfrs:CurrentTradePayableDueToContractCustomer | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Trade payables due to holding company/Group [member] | ssmt-mfrs:CurrentTradePayablesDueToHoldingCompany | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Trade payables due to holding company/Company [member] | ssmt-mfrs:CurrentTradePayablesDueToHoldingCompany | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r6.c0 | Trade payables due to subsidiaries/Group [member] | ssmt-mfrs:CurrentTradePayablesDueToSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r6.c1 | Trade payables due to subsidiaries/Company [member] | ssmt-mfrs:CurrentTradePayablesDueToSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r7.c0 | Trade payables due to associates/Group [member] | ssmt-mfrs:CurrentTradePayablesDueToAssociates | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r7.c1 | Trade payables due to associates/Company [member] | ssmt-mfrs:CurrentTradePayablesDueToAssociates | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r8.c0 | Trade payables due to joint ventures/Group [member] | ssmt-mfrs:CurrentTradePayablesDueToJointVentures | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r8.c1 | Trade payables due to joint ventures/Company [member] | ssmt-mfrs:CurrentTradePayablesDueToJointVentures | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r9.c0 | Trade payables due to other related parties/Group [member] | ssmt-mfrs:CurrentTradePayablesDueToRelatedCompanies | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r9.c1 | Trade payables due to other related parties/Company [member] | ssmt-mfrs:CurrentTradePayablesDueToRelatedCompanies | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r10.c0 | Other current trade payables/Group [member] | ssmt-mfrs:OtherCurrentTradePayables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r10.c1 | Other current trade payables/Company [member] | ssmt-mfrs:OtherCurrentTradePayables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r11.c0 | Total current trade payables/Group [member] | ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r11.c1 | Total current trade payables/Company [member] | ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r12.c0 | Other current payables [abstract]/Group [member] | ssmt-mfrs:OtherCurrentPayablesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r12.c1 | Other current payables [abstract]/Company [member] | ssmt-mfrs:OtherCurrentPayablesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r13.c0 | Other current payables due to related parties [abstract]/Group [member] | ssmt-mfrs:OtherCurrentPayablesDueToRelatedPartiesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r13.c1 | Other current payables due to related parties [abstract]/Company [member] | ssmt-mfrs:OtherCurrentPayablesDueToRelatedPartiesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r14.c0 | Other payables due to holding company/Group [member] | ssmt-mfrs:OtherCurrentPayablesDueToHoldingCompany | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r14.c1 | Other payables due to holding company/Company [member] | ssmt-mfrs:OtherCurrentPayablesDueToHoldingCompany | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r15.c0 | Other payables due to subsidiaries/Group [member] | ssmt-mfrs:OtherCurrentPayablesDueToSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r15.c1 | Other payables due to subsidiaries/Company [member] | ssmt-mfrs:OtherCurrentPayablesDueToSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r16.c0 | Other payables due to associates/Group [member] | ssmt-mfrs:OtherCurrentPayablesDueToAssociates | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r16.c1 | Other payables due to associates/Company [member] | ssmt-mfrs:OtherCurrentPayablesDueToAssociates | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r17.c0 | Other payables due to joint ventures/Group [member] | ssmt-mfrs:OtherCurrentPayablesDueToJointVentures | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r17.c1 | Other payables due to joint ventures/Company [member] | ssmt-mfrs:OtherCurrentPayablesDueToJointVentures | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r18.c0 | Other payables due to other related parties/Group [member] | ssmt-mfrs:OtherCurrentPayablesDueToOtherRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r18.c1 | Other payables due to other related parties/Company [member] | ssmt-mfrs:OtherCurrentPayablesDueToOtherRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r19.c0 | Total other current payables due to related parties/Group [member] | ssmt-mfrs:OtherCurrentPayablesDueToRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r19.c1 | Total other current payables due to related parties/Company [member] | ssmt-mfrs:OtherCurrentPayablesDueToRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r20.c0 | Other payables due to non-controlling interests [abstract]/Group [member] | ssmt-mfrs:OtherCurrentPayablesDueToNoncontrollingInterestsAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r20.c1 | Other payables due to non-controlling interests [abstract]/Company [member] | ssmt-mfrs:OtherCurrentPayablesDueToNoncontrollingInterestsAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r21.c0 | Dividend payable to non-controlling interests/Group [member] | ssmt-mfrs:OtherCurrentDividendPayableToNoncontrollingInterest | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r21.c1 | Dividend payable to non-controlling interests/Company [member] | ssmt-mfrs:OtherCurrentDividendPayableToNoncontrollingInterest | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r22.c0 | Loans from non-controlling interests/Group [member] | ssmt-mfrs:OtherCurrentLoansFromNoncontrollingInterest | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r22.c1 | Loans from non-controlling interests/Company [member] | ssmt-mfrs:OtherCurrentLoansFromNoncontrollingInterest | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r23.c0 | Miscellaneous payable due to non-controlling interests/Group [member] | ssmt-mfrs:OtherCurrentMiscellaneousPayableDueToNoncontrollingInterest | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r23.c1 | Miscellaneous payable due to non-controlling interests/Company [member] | ssmt-mfrs:OtherCurrentMiscellaneousPayableDueToNoncontrollingInterest | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r24.c0 | Total other payables due to non-controlling interests/Group [member] | ssmt-mfrs:OtherCurrentPayablesDueToNoncontrollingInterests | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r24.c1 | Total other payables due to non-controlling interests/Company [member] | ssmt-mfrs:OtherCurrentPayablesDueToNoncontrollingInterests | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r25.c0 | Current non-trade payables [abstract]/Group [member] | ssmt-mfrs:CurrentNontradePayablesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r25.c1 | Current non-trade payables [abstract]/Company [member] | ssmt-mfrs:CurrentNontradePayablesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r26.c0 | Accruals/Group [member] | ssmt-mfrs:CurrentNontradeAccruals | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r26.c1 | Accruals/Company [member] | ssmt-mfrs:CurrentNontradeAccruals | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r27.c0 | Retention payables/Group [member] | ssmt-mfrs:CurrentNontradeRetentionPayable | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r27.c1 | Retention payables/Company [member] | ssmt-mfrs:CurrentNontradeRetentionPayable | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r28.c0 | Deferred income/Group [member] | ssmt-mfrs:CurrentNontradeDeferredIncome | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r28.c1 | Deferred income/Company [member] | ssmt-mfrs:CurrentNontradeDeferredIncome | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r29.c0 | Deposits and advanced billings/Group [member] | ssmt-mfrs:CurrentNontradeDepositsAndAdvancedBillings | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r29.c1 | Deposits and advanced billings/Company [member] | ssmt-mfrs:CurrentNontradeDepositsAndAdvancedBillings | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r30.c0 | Financing costs/Group [member] | ssmt-mfrs:CurrentNontradeFinancingCosts | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r30.c1 | Financing costs/Company [member] | ssmt-mfrs:CurrentNontradeFinancingCosts | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r31.c0 | Dividend payables/Group [member] | ssmt-mfrs:CurrentNontradeDividendPayable | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r31.c1 | Dividend payables/Company [member] | ssmt-mfrs:CurrentNontradeDividendPayable | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r32.c0 | Interest payables/Group [member] | ssmt-mfrs:CurrentNontradeInterestPayable | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r32.c1 | Interest payables/Company [member] | ssmt-mfrs:CurrentNontradeInterestPayable | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r33.c0 | Other current non-trade payables/Group [member] | ssmt-mfrs:OtherCurrentNontradePayables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r33.c1 | Other current non-trade payables/Company [member] | ssmt-mfrs:OtherCurrentNontradePayables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r34.c0 | Total current non-trade payables/Group [member] | ssmt-mfrs:CurrentNontradePayables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r34.c1 | Total current non-trade payables/Company [member] | ssmt-mfrs:CurrentNontradePayables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r35.c0 | Total other current payables/Group [member] | ifrs-full:OtherCurrentPayables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r35.c1 | Total other current payables/Company [member] | ifrs-full:OtherCurrentPayables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r36.c0 | Total trade and other current payables/Group [member] | ifrs-full:TradeAndOtherCurrentPayables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r36.c1 | Total trade and other current payables/Company [member] | ifrs-full:TradeAndOtherCurrentPayables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |