| r0.c0 | RuleNode_365/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_365/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Trade and other non-current payables [abstract]/Group [member] | ifrs-full:NoncurrentPayablesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Trade and other non-current payables [abstract]/Company [member] | ifrs-full:NoncurrentPayablesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Non-current trade payables [abstract]/Group [member] | ssmt-mfrs:NoncurrentTradePayablesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r2.c1 | Non-current trade payables [abstract]/Company [member] | ssmt-mfrs:NoncurrentTradePayablesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r3.c0 | Trade payables/Group [member] | ssmt-mfrs:NoncurrentTradePayablesDueToCustomers | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Trade payables/Company [member] | ssmt-mfrs:NoncurrentTradePayablesDueToCustomers | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Trade payables due to contract suppliers/Group [member] | ssmt-mfrs:TradePayablesDueToContractCustomers | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Trade payables due to contract suppliers/Company [member] | ssmt-mfrs:TradePayablesDueToContractCustomers | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Trade payables due to holding company/Group [member] | ssmt-mfrs:NoncurrentTradePayablesDueToHoldingCompany | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Trade payables due to holding company/Company [member] | ssmt-mfrs:NoncurrentTradePayablesDueToHoldingCompany | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r6.c0 | Trade payables due to subsidiaries/Group [member] | ssmt-mfrs:NoncurrentTradePayablesDueToSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r6.c1 | Trade payables due to subsidiaries/Company [member] | ssmt-mfrs:NoncurrentTradePayablesDueToSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r7.c0 | Trade payables due to associates/Group [member] | ssmt-mfrs:NoncurrentTradePayablesDueToAssociates | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r7.c1 | Trade payables due to associates/Company [member] | ssmt-mfrs:NoncurrentTradePayablesDueToAssociates | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r8.c0 | Trade payables due to joint ventures/Group [member] | ssmt-mfrs:NoncurrentTradePayablesDueToJointVentures | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r8.c1 | Trade payables due to joint ventures/Company [member] | ssmt-mfrs:NoncurrentTradePayablesDueToJointVentures | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r9.c0 | Trade payables due to other related parties/Group [member] | ssmt-mfrs:NoncurrentTradePayablesDueToOtherRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r9.c1 | Trade payables due to other related parties/Company [member] | ssmt-mfrs:NoncurrentTradePayablesDueToOtherRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r10.c0 | Other non-current trade payables/Group [member] | ssmt-mfrs:OtherNoncurrentTradePayables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r10.c1 | Other non-current trade payables/Company [member] | ssmt-mfrs:OtherNoncurrentTradePayables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r11.c0 | Total non-current trade payables/Group [member] | ifrs-full:NoncurrentPayablesToTradeSuppliers | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r11.c1 | Total non-current trade payables/Company [member] | ifrs-full:NoncurrentPayablesToTradeSuppliers | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r12.c0 | Other non-current payables [abstract]/Group [member] | ssmt-mfrs:OtherNoncurrentTradePayablesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r12.c1 | Other non-current payables [abstract]/Company [member] | ssmt-mfrs:OtherNoncurrentTradePayablesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r13.c0 | Other non-current payables due to related parties [abstract]/Group [member] | ssmt-mfrs:OtherNoncurrentPayablesDueToRelatedPartiesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r13.c1 | Other non-current payables due to related parties [abstract]/Company [member] | ssmt-mfrs:OtherNoncurrentPayablesDueToRelatedPartiesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r14.c0 | Other payables due to holding company/Group [member] | ssmt-mfrs:OtherNoncurrentTradePayablesDueToHoldingCompany | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r14.c1 | Other payables due to holding company/Company [member] | ssmt-mfrs:OtherNoncurrentTradePayablesDueToHoldingCompany | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r15.c0 | Other payables due to subsidiaries/Group [member] | ssmt-mfrs:OtherNoncurrentTradePayablesDueToSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r15.c1 | Other payables due to subsidiaries/Company [member] | ssmt-mfrs:OtherNoncurrentTradePayablesDueToSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r16.c0 | Other payables due to associates/Group [member] | ssmt-mfrs:OtherNoncurrentTradePayablesDueToAssociates | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r16.c1 | Other payables due to associates/Company [member] | ssmt-mfrs:OtherNoncurrentTradePayablesDueToAssociates | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r17.c0 | Other payables due to joint ventures/Group [member] | ssmt-mfrs:OtherNoncurrentTradePayablesDueToJointVentures | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r17.c1 | Other payables due to joint ventures/Company [member] | ssmt-mfrs:OtherNoncurrentTradePayablesDueToJointVentures | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r18.c0 | Other payables due to other related parties/Group [member] | ssmt-mfrs:OtherNoncurrentPayablesDueToRelatedCompanies | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r18.c1 | Other payables due to other related parties/Company [member] | ssmt-mfrs:OtherNoncurrentPayablesDueToRelatedCompanies | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r19.c0 | Total other non-current payables due to related parties/Group [member] | ssmt-mfrs:OtherNoncurrentPayablesDueToRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r19.c1 | Total other non-current payables due to related parties/Company [member] | ssmt-mfrs:OtherNoncurrentPayablesDueToRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r20.c0 | Other payables due to non-controlling interests [abstract]/Group [member] | ssmt-mfrs:OtherNoncurrentPayablesDueToNoncontrollingInterestAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r20.c1 | Other payables due to non-controlling interests [abstract]/Company [member] | ssmt-mfrs:OtherNoncurrentPayablesDueToNoncontrollingInterestAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r21.c0 | Dividend payable to non-controlling interests/Group [member] | ssmt-mfrs:OtherNoncurrentDividendPayablesDueToNoncontrollingInterests | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r21.c1 | Dividend payable to non-controlling interests/Company [member] | ssmt-mfrs:OtherNoncurrentDividendPayablesDueToNoncontrollingInterests | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r22.c0 | Loans from non-controlling interests/Group [member] | ssmt-mfrs:OtherNoncurrentLoansFromNoncontrollingInterests | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r22.c1 | Loans from non-controlling interests/Company [member] | ssmt-mfrs:OtherNoncurrentLoansFromNoncontrollingInterests | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r23.c0 | Miscellaneous payables due to non-controlling interests/Group [member] | ssmt-mfrs:OtherNoncurrentMiscellaneousPayablesDueToNoncontrollingInterests | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r23.c1 | Miscellaneous payables due to non-controlling interests/Company [member] | ssmt-mfrs:OtherNoncurrentMiscellaneousPayablesDueToNoncontrollingInterests | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r24.c0 | Total other payables due to non-controlling interests/Group [member] | ssmt-mfrs:OtherNoncurrentPayablesDueToNoncontrollingInterests | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r24.c1 | Total other payables due to non-controlling interests/Company [member] | ssmt-mfrs:OtherNoncurrentPayablesDueToNoncontrollingInterests | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r25.c0 | Non-current non-trade payables [abstract]/Group [member] | ssmt-mfrs:NoncurrentNontradePayablesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r25.c1 | Non-current non-trade payables [abstract]/Company [member] | ssmt-mfrs:NoncurrentNontradePayablesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r26.c0 | Deferred income/Group [member] | ssmt-mfrs:NoncurrentNontradeDeferredIncome | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r26.c1 | Deferred income/Company [member] | ssmt-mfrs:NoncurrentNontradeDeferredIncome | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r27.c0 | Accruals/Group [member] | ssmt-mfrs:NoncurrentNontradeAccruals | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r27.c1 | Accruals/Company [member] | ssmt-mfrs:NoncurrentNontradeAccruals | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r28.c0 | Retention payables/Group [member] | ssmt-mfrs:NoncurrentNontradeRetentionPayables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r28.c1 | Retention payables/Company [member] | ssmt-mfrs:NoncurrentNontradeRetentionPayables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r29.c0 | Deposit/Group [member] | ssmt-mfrs:NoncurrentNontradeDepositsAndAdvancedBillings | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r29.c1 | Deposit/Company [member] | ssmt-mfrs:NoncurrentNontradeDepositsAndAdvancedBillings | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r30.c0 | Other non-current non-trade payables/Group [member] | ssmt-mfrs:OtherNoncurrentNontradePayables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r30.c1 | Other non-current non-trade payables/Company [member] | ssmt-mfrs:OtherNoncurrentNontradePayables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r31.c0 | Total non-current non-trade payables/Group [member] | ssmt-mfrs:NoncurrentNontradePayables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r31.c1 | Total non-current non-trade payables/Company [member] | ssmt-mfrs:NoncurrentNontradePayables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r32.c0 | Total other non-current payables/Group [member] | ifrs-full:OtherNoncurrentPayables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r32.c1 | Total other non-current payables/Company [member] | ifrs-full:OtherNoncurrentPayables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r33.c0 | Total trade and other non-current payables/Group [member] | ifrs-full:NoncurrentPayables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r33.c1 | Total trade and other non-current payables/Company [member] | ifrs-full:NoncurrentPayables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |