| r0.c0 | RuleNode_40/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_40/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Investment properties [abstract]/Group [member] | ifrs-full:InvestmentPropertyAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Investment properties [abstract]/Company [member] | ifrs-full:InvestmentPropertyAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Investment properties completed, at fair value [abstract]/Group [member] | ssmt-mfrs:InvestmentPropertiesCompletedAtFairValueAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r2.c1 | Investment properties completed, at fair value [abstract]/Company [member] | ssmt-mfrs:InvestmentPropertiesCompletedAtFairValueAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r3.c0 | Freehold land and building/Group [member] | ssmt-mfrs:InvestmentPropertyFreeholdLandAndBuilding | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Freehold land and building/Company [member] | ssmt-mfrs:InvestmentPropertyFreeholdLandAndBuilding | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Leasehold land and building/Group [member] | ssmt-mfrs:InvestmentPropertyLeaseholdLandAndBuilding | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Leasehold land and building/Company [member] | ssmt-mfrs:InvestmentPropertyLeaseholdLandAndBuilding | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Total investment properties completed, at fair value/Group [member] | ifrs-full:InvestmentPropertyCompleted | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Total investment properties completed, at fair value/Company [member] | ifrs-full:InvestmentPropertyCompleted | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r6.c0 | Investment properties under construction or development, at cost [abstract]/Group [member] | ssmt-mfrs:InvestmentPropertiesUnderConstructionOrDevelopmentAtCostAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r6.c1 | Investment properties under construction or development, at cost [abstract]/Company [member] | ssmt-mfrs:InvestmentPropertiesUnderConstructionOrDevelopmentAtCostAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r7.c0 | Building under construction/Group [member] | ssmt-mfrs:InvestmentPropertyBuildingUnderConstruction | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r7.c1 | Building under construction/Company [member] | ssmt-mfrs:InvestmentPropertyBuildingUnderConstruction | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r8.c0 | Total investment properties under construction or development, at cost/Group [member] | ifrs-full:InvestmentPropertyUnderConstructionOrDevelopment | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r8.c1 | Total investment properties under construction or development, at cost/Company [member] | ifrs-full:InvestmentPropertyUnderConstructionOrDevelopment | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r9.c0 | Other investment property/Group [member] | ssmt-mfrs:OtherInvestmentProperty | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r9.c1 | Other investment property/Company [member] | ssmt-mfrs:OtherInvestmentProperty | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r10.c0 | Total investment properties/Group [member] | ifrs-full:InvestmentProperty | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r10.c1 | Total investment properties/Company [member] | ifrs-full:InvestmentProperty | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |