| r0.c0 | RuleNode_218/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_218/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Other reserves [abstract]/Group [member] | ifrs-full:OtherReservesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Other reserves [abstract]/Company [member] | ifrs-full:OtherReservesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Non-distributable [abstract]/Group [member] | ssmt-mfrs:NondistributableReservesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r2.c1 | Non-distributable [abstract]/Company [member] | ssmt-mfrs:NondistributableReservesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r3.c0 | Capital reserve/Group [member] | ifrs-full:CapitalReserve | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Capital reserve/Company [member] | ifrs-full:CapitalReserve | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Hedging reserve/Group [member] | ifrs-full:ReserveOfCashFlowHedges | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Hedging reserve/Company [member] | ifrs-full:ReserveOfCashFlowHedges | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Foreign currency translation reserve/Group [member] | ifrs-full:ReserveOfExchangeDifferencesOnTranslation | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Foreign currency translation reserve/Company [member] | ifrs-full:ReserveOfExchangeDifferencesOnTranslation | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r6.c0 | Reserve of share-based payments/Group [member] | ifrs-full:ReserveOfSharebasedPayments | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r6.c1 | Reserve of share-based payments/Company [member] | ifrs-full:ReserveOfSharebasedPayments | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r7.c0 | Revaluation surplus/Group [member] | ifrs-full:RevaluationSurplus | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r7.c1 | Revaluation surplus/Company [member] | ifrs-full:RevaluationSurplus | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r8.c0 | Statutory reserve/Group [member] | ifrs-full:StatutoryReserve | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r8.c1 | Statutory reserve/Company [member] | ifrs-full:StatutoryReserve | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r9.c0 | Other non-distributable reserves/Group [member] | ssmt-mfrs:OtherNondistributableReserves | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r9.c1 | Other non-distributable reserves/Company [member] | ssmt-mfrs:OtherNondistributableReserves | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r10.c0 | Total non-distributable other reserves/Group [member] | ssmt-mfrs:NondistributableReserves | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r10.c1 | Total non-distributable other reserves/Company [member] | ssmt-mfrs:NondistributableReserves | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r11.c0 | Distributable [abstract]/Group [member] | ssmt-mfrs:DistributableReserveAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r11.c1 | Distributable [abstract]/Company [member] | ssmt-mfrs:DistributableReserveAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r12.c0 | Fair value reserves/Group [member] | ssmt-mfrs:FairValueReserves | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r12.c1 | Fair value reserves/Company [member] | ssmt-mfrs:FairValueReserves | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r13.c0 | Reserve of non-current assets classified as held for sale/Group [member] | ssmt-mfrs:ReserveOfNoncurrentAssetsClassifiedAsHeldForSale | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r13.c1 | Reserve of non-current assets classified as held for sale/Company [member] | ssmt-mfrs:ReserveOfNoncurrentAssetsClassifiedAsHeldForSale | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r14.c0 | Consolidation reserve/Group [member] | ssmt-mfrs:ConsolidatedReserve | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r14.c1 | Consolidation reserve/Company [member] | ssmt-mfrs:ConsolidatedReserve | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r15.c0 | Warranty reserve/Group [member] | ssmt-mfrs:WarrantyReserve | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r15.c1 | Warranty reserve/Company [member] | ssmt-mfrs:WarrantyReserve | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r16.c0 | Other distributable reserves/Group [member] | ssmt-mfrs:OtherDistributableReserve | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r16.c1 | Other distributable reserves/Company [member] | ssmt-mfrs:OtherDistributableReserve | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r17.c0 | Total distributable other reserves/Group [member] | ssmt-mfrs:DistributableReserve | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r17.c1 | Total distributable other reserves/Company [member] | ssmt-mfrs:DistributableReserve | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r18.c0 | Total other reserves/Group [member] | ifrs-full:OtherReserves | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r18.c1 | Total other reserves/Company [member] | ifrs-full:OtherReserves | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |