| r0.c0 | RuleNode_33/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_33/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Other income [abstract]/Group [member] | ssmt-mfrs:OtherIncomeAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Other income [abstract]/Company [member] | ssmt-mfrs:OtherIncomeAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Deferred income/Group [member] | ssmt-mfrs:AmortisationOfDeferredIncome | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r2.c1 | Deferred income/Company [member] | ssmt-mfrs:AmortisationOfDeferredIncome | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r3.c0 | Grants or incentives/Group [member] | ssmt-mfrs:IncomeReceivedFromGrantsOrIncentive | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Grants or incentives/Company [member] | ssmt-mfrs:IncomeReceivedFromGrantsOrIncentive | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Realised gain on foreign exchange/Group [member] | ssmt-mfrs:RealisedGainOnForeignExchange | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Realised gain on foreign exchange/Company [member] | ssmt-mfrs:RealisedGainOnForeignExchange | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Unrealised gain on foreign exchange/Group [member] | ssmt-mfrs:UnrealisedGainOnForeignExchange | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Unrealised gain on foreign exchange/Company [member] | ssmt-mfrs:UnrealisedGainOnForeignExchange | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r6.c0 | Gain from disposal of a subsidiary, joint ventures and associates/Group [member] | ssmt-mfrs:GainsOnDisposalOfSubsidiaryJointVenturesAndAssociates | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r6.c1 | Gain from disposal of a subsidiary, joint ventures and associates/Company [member] | ssmt-mfrs:GainsOnDisposalOfSubsidiaryJointVenturesAndAssociates | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r7.c0 | Gain on disposal of property, plant and equipment/Group [member] | ifrs-full:GainsOnDisposalsOfPropertyPlantAndEquipment | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r7.c1 | Gain on disposal of property, plant and equipment/Company [member] | ifrs-full:GainsOnDisposalsOfPropertyPlantAndEquipment | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r8.c0 | Gain on disposal from other investments/Group [member] | ssmt-mfrs:GainsOnDisposalOfOtherInvestments | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r8.c1 | Gain on disposal from other investments/Company [member] | ssmt-mfrs:GainsOnDisposalOfOtherInvestments | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r9.c0 | Reversal of impairment losses/Group [member] | ifrs-full:ReversalOfImpairmentLoss | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r9.c1 | Reversal of impairment losses/Company [member] | ifrs-full:ReversalOfImpairmentLoss | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r10.c0 | Other miscellaneous income/Group [member] | ssmt-mfrs:MiscellaneousOtherIncome | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r10.c1 | Other miscellaneous income/Company [member] | ssmt-mfrs:MiscellaneousOtherIncome | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r11.c0 | Total other income/Group [member] | ifrs-full:OtherIncome | xbrli:monetaryItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r11.c1 | Total other income/Company [member] | ifrs-full:OtherIncome | xbrli:monetaryItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |