| r0.c0 | RuleNode_42/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_42/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Cost of sales [abstract]/Group [member] | ssmt-mfrs:CostOfSalesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Cost of sales [abstract]/Company [member] | ssmt-mfrs:CostOfSalesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Cost of inventories/Group [member] | ssmt-mfrs:CostOfInventories | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r2.c1 | Cost of inventories/Company [member] | ssmt-mfrs:CostOfInventories | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r3.c0 | Construction contract costs/Group [member] | ssmt-mfrs:ConstructionContractCost | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Construction contract costs/Company [member] | ssmt-mfrs:ConstructionContractCost | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Energy costs/Group [member] | ifrs-full:EnergyExpense | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Energy costs/Company [member] | ifrs-full:EnergyExpense | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Property development costs/Group [member] | ifrs-full:PropertyDevelopmentAndProjectManagementExpense | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Property development costs/Company [member] | ifrs-full:PropertyDevelopmentAndProjectManagementExpense | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r6.c0 | Other cost of sales/Group [member] | ssmt-mfrs:OtherCostOfSales | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r6.c1 | Other cost of sales/Company [member] | ssmt-mfrs:OtherCostOfSales | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r7.c0 | Total cost of sales/Group [member] | ifrs-full:CostOfSales | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r7.c1 | Total cost of sales/Company [member] | ifrs-full:CostOfSales | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |