| r0.c0 | RuleNode_107/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_107/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Investments in joint ventures [abstract]/Group [member] | ssmt-mfrs:InvestmentsInJointVentureAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Investments in joint ventures [abstract]/Company [member] | ssmt-mfrs:InvestmentsInJointVentureAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Unquoted shares, net of impairment losses/Group [member] | ssmt-mfrs:InvestmentInJointVenturesUnquotedSharesInMalaysiaNetOfImpairmentLosses | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r2.c1 | Unquoted shares, net of impairment losses/Company [member] | ssmt-mfrs:InvestmentInJointVenturesUnquotedSharesInMalaysiaNetOfImpairmentLosses | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r3.c0 | Quoted shares in Malaysia/Group [member] | ssmt-mfrs:InvestmentInJointVenturesQuotedSharesInMalaysia | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Quoted shares in Malaysia/Company [member] | ssmt-mfrs:InvestmentInJointVenturesQuotedSharesInMalaysia | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Quoted shares outside Malaysia/Group [member] | ssmt-mfrs:InvestmentInJointVenturesQuotedSharesOutsideMalaysia | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Quoted shares outside Malaysia/Company [member] | ssmt-mfrs:InvestmentInJointVenturesQuotedSharesOutsideMalaysia | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Fair value adjustments on loans and advances and financial guarantee/Group [member] | ssmt-mfrs:InvestmentInJointVenturesFairValueAdjustmentsOnLoansAdvancesAndFinancialGuarantee | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Fair value adjustments on loans and advances and financial guarantee/Company [member] | ssmt-mfrs:InvestmentInJointVenturesFairValueAdjustmentsOnLoansAdvancesAndFinancialGuarantee | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r6.c0 | Share of post-acquisition profits and reserves/Group [member] | ssmt-mfrs:InvestmentsInJointVentureShareOfPostAcquisitionProfitsAndReserves | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r6.c1 | Share of post-acquisition profits and reserves/Company [member] | ssmt-mfrs:InvestmentsInJointVentureShareOfPostAcquisitionProfitsAndReserves | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r7.c0 | Unrealised profit on transactions with joint ventures/Group [member] | ssmt-mfrs:InvestmentsInJointVentureUnrealisedProfitOnTransactionsWithJointVentures | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r7.c1 | Unrealised profit on transactions with joint ventures/Company [member] | ssmt-mfrs:InvestmentsInJointVentureUnrealisedProfitOnTransactionsWithJointVentures | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r8.c0 | Other investments in joint ventures/Group [member] | ssmt-mfrs:InvestmentsInJointVentureOtherInvestment | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r8.c1 | Other investments in joint ventures/Company [member] | ssmt-mfrs:InvestmentsInJointVentureOtherInvestment | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r9.c0 | Total investments in joint ventures/Group [member] | ifrs-full:InvestmentsInJointVentures | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r9.c1 | Total investments in joint ventures/Company [member] | ifrs-full:InvestmentsInJointVentures | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |