| r0.c0 | RuleNode_94/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_94/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Investments in associates [abstract]/Group [member] | ssmt-mfrs:InvestmentsInAssociatesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Investments in associates [abstract]/Company [member] | ssmt-mfrs:InvestmentsInAssociatesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Unquoted shares, net of impairment losses/Group [member] | ssmt-mfrs:InvestmentInAssociatesUnquotedSharesInMalaysiaNetOfImpairmentLosses | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r2.c1 | Unquoted shares, net of impairment losses/Company [member] | ssmt-mfrs:InvestmentInAssociatesUnquotedSharesInMalaysiaNetOfImpairmentLosses | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r3.c0 | Quoted shares in Malaysia/Group [member] | ssmt-mfrs:InvestmentInAssociatesQuotedSharesInMalaysia | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Quoted shares in Malaysia/Company [member] | ssmt-mfrs:InvestmentInAssociatesQuotedSharesInMalaysia | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Quoted shares outside Malaysia/Group [member] | ssmt-mfrs:InvestmentInAssociatesQuotedSharesOutsideMalaysia | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Quoted shares outside Malaysia/Company [member] | ssmt-mfrs:InvestmentInAssociatesQuotedSharesOutsideMalaysia | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Fair value adjustments on loans and advances and financial guarantee/Group [member] | ssmt-mfrs:InvestmentInAssociatesFairValueAdjustmentsOnLoansAndAdvancesAndFinancialGuarantee | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Fair value adjustments on loans and advances and financial guarantee/Company [member] | ssmt-mfrs:InvestmentInAssociatesFairValueAdjustmentsOnLoansAndAdvancesAndFinancialGuarantee | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r6.c0 | Share of post-acquisition profits and reserves/Group [member] | ssmt-mfrs:InvestmentsInAssociatesShareOfPostAcquisitionProfitsAndReserves | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r6.c1 | Share of post-acquisition profits and reserves/Company [member] | ssmt-mfrs:InvestmentsInAssociatesShareOfPostAcquisitionProfitsAndReserves | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r7.c0 | Unrealised profit on transactions with associates/Group [member] | ssmt-mfrs:InvestmentInAssociatesUnrealisedProfitOnTransactionsWithAssociates | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r7.c1 | Unrealised profit on transactions with associates/Company [member] | ssmt-mfrs:InvestmentInAssociatesUnrealisedProfitOnTransactionsWithAssociates | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r8.c0 | Other investments in associates/Group [member] | ssmt-mfrs:InvestmentsInAssociatesOtherInvestmentsNetOfImpairmentLosses | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r8.c1 | Other investments in associates/Company [member] | ssmt-mfrs:InvestmentsInAssociatesOtherInvestmentsNetOfImpairmentLosses | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r9.c0 | Total investments in associates/Group [member] | ifrs-full:InvestmentsInAssociates | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r9.c1 | Total investments in associates/Company [member] | ifrs-full:InvestmentsInAssociates | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |