| r0.c0 | RuleNode_121/Group [member] | | | | ifrs-smes:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_121/Company [member] | | | | ifrs-smes:SeparateMember | N/A |
| r1.c0 | Trade and other current receivables [abstract]/Group [member] | ifrs-smes:TradeAndOtherReceivablesAbstract | xbrli:stringItemType | duration | ifrs-smes:ConsolidatedMember | N/A |
| r1.c1 | Trade and other current receivables [abstract]/Company [member] | ifrs-smes:TradeAndOtherReceivablesAbstract | xbrli:stringItemType | duration | ifrs-smes:SeparateMember | N/A |
| r2.c0 | Current trade receivables [abstract]/Group [member] | ssmt-mpers:TradeReceivablesAbstract | xbrli:stringItemType | duration | ifrs-smes:ConsolidatedMember | N/A |
| r2.c1 | Current trade receivables [abstract]/Company [member] | ssmt-mpers:TradeReceivablesAbstract | xbrli:stringItemType | duration | ifrs-smes:SeparateMember | N/A |
| r3.c0 | Trade receivables due from contract customers/Group [member] | ssmt-mpers:CurrentTradeReceivablesDueFromContractCustomers | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Trade receivables due from contract customers/Company [member] | ssmt-mpers:CurrentTradeReceivablesDueFromContractCustomers | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r4.c0 | Trade receivables due from holding company/Group [member] | ssmt-mpers:CurrentTradeReceivablesDueFromHoldingCompany | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Trade receivables due from holding company/Company [member] | ssmt-mpers:CurrentTradeReceivablesDueFromHoldingCompany | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r5.c0 | Trade receivables due from subsidiaries/Group [member] | ssmt-mpers:CurrentTradeReceivablesDueFromSubsidiaries | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Trade receivables due from subsidiaries/Company [member] | ssmt-mpers:CurrentTradeReceivablesDueFromSubsidiaries | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r6.c0 | Trade receivables due from associates/Group [member] | ssmt-mpers:CurrentTradeReceivablesDueFromAssociates | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r6.c1 | Trade receivables due from associates/Company [member] | ssmt-mpers:CurrentTradeReceivablesDueFromAssociates | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r7.c0 | Trade receivables due from joint ventures/Group [member] | ssmt-mpers:CurrentTradeReceivablesDueFromJointVentures | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r7.c1 | Trade receivables due from joint ventures/Company [member] | ssmt-mpers:CurrentTradeReceivablesDueFromJointVentures | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r8.c0 | Trade receivables due from other related parties/Group [member] | ssmt-mpers:CurrentTradeReceivablesDueFromRelatedParties | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r8.c1 | Trade receivables due from other related parties/Company [member] | ssmt-mpers:CurrentTradeReceivablesDueFromRelatedParties | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r9.c0 | Other current trade receivables/Group [member] | ssmt-mpers:OtherCurrentTradeReceivables | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r9.c1 | Other current trade receivables/Company [member] | ssmt-mpers:OtherCurrentTradeReceivables | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r10.c0 | Total current trade receivables/Group [member] | ssmt-mpers:CurrentTradeReceivables | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r10.c1 | Total current trade receivables/Company [member] | ssmt-mpers:CurrentTradeReceivables | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r11.c0 | Other current receivables [abstract]/Group [member] | ssmt-mpers:OtherReceivablesAbstract | xbrli:stringItemType | duration | ifrs-smes:ConsolidatedMember | N/A |
| r11.c1 | Other current receivables [abstract]/Company [member] | ssmt-mpers:OtherReceivablesAbstract | xbrli:stringItemType | duration | ifrs-smes:SeparateMember | N/A |
| r12.c0 | Current other receivables due from related parties [abstract]/Group [member] | ssmt-mpers:OtherReceivablesDueFromRelatedPartiesAbstract | xbrli:stringItemType | duration | ifrs-smes:ConsolidatedMember | N/A |
| r12.c1 | Current other receivables due from related parties [abstract]/Company [member] | ssmt-mpers:OtherReceivablesDueFromRelatedPartiesAbstract | xbrli:stringItemType | duration | ifrs-smes:SeparateMember | N/A |
| r13.c0 | Other receivables due from holding company/Group [member] | ssmt-mpers:OtherCurrentReceivablesDueFromHoldingCompany | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r13.c1 | Other receivables due from holding company/Company [member] | ssmt-mpers:OtherCurrentReceivablesDueFromHoldingCompany | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r14.c0 | Other receivables from subsidiaries/Group [member] | ssmt-mpers:OtherCurrentReceivablesDueFromSubsidiaries | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r14.c1 | Other receivables from subsidiaries/Company [member] | ssmt-mpers:OtherCurrentReceivablesDueFromSubsidiaries | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r15.c0 | Other receivables from associates/Group [member] | ssmt-mpers:OtherCurrentReceivablesDueFromAssociates | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r15.c1 | Other receivables from associates/Company [member] | ssmt-mpers:OtherCurrentReceivablesDueFromAssociates | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r16.c0 | Other receivables due from joint ventures/Group [member] | ssmt-mpers:OtherCurrentReceivablesDueFromJointVentures | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r16.c1 | Other receivables due from joint ventures/Company [member] | ssmt-mpers:OtherCurrentReceivablesDueFromJointVentures | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r17.c0 | Other receivables due from other related parties/Group [member] | ssmt-mpers:OtherCurrentReceivablesDueFromOtherRelatedParties | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r17.c1 | Other receivables due from other related parties/Company [member] | ssmt-mpers:OtherCurrentReceivablesDueFromOtherRelatedParties | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r18.c0 | Total current other receivables due from related parties/Group [member] | ssmt-mpers:OtherCurrentReceivablesDueFromRelatedParties | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r18.c1 | Total current other receivables due from related parties/Company [member] | ssmt-mpers:OtherCurrentReceivablesDueFromRelatedParties | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r19.c0 | Current prepayments and current accrued income [abstract]/Group [member] | ssmt-mpers:PrepaymentsAndAccruedIncomeAbstract | xbrli:stringItemType | duration | ifrs-smes:ConsolidatedMember | N/A |
| r19.c1 | Current prepayments and current accrued income [abstract]/Company [member] | ssmt-mpers:PrepaymentsAndAccruedIncomeAbstract | xbrli:stringItemType | duration | ifrs-smes:SeparateMember | N/A |
| r20.c0 | Prepayments/Group [member] | ssmt-mpers:OtherCurrentPrepayments | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r20.c1 | Prepayments/Company [member] | ssmt-mpers:OtherCurrentPrepayments | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r21.c0 | Accrued income/Group [member] | ssmt-mpers:OtherCurrentAccruedIncome | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r21.c1 | Accrued income/Company [member] | ssmt-mpers:OtherCurrentAccruedIncome | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r22.c0 | Total current prepayments and current accrued income/Group [member] | ssmt-mpers:OtherCurrentPrepaymentsAndCurrentAccruedIncome | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r22.c1 | Total current prepayments and current accrued income/Company [member] | ssmt-mpers:OtherCurrentPrepaymentsAndCurrentAccruedIncome | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r23.c0 | Current non-trade receivables [abstract]/Group [member] | ssmt-mpers:NontradeReceivablesAbstract | xbrli:stringItemType | duration | ifrs-smes:ConsolidatedMember | N/A |
| r23.c1 | Current non-trade receivables [abstract]/Company [member] | ssmt-mpers:NontradeReceivablesAbstract | xbrli:stringItemType | duration | ifrs-smes:SeparateMember | N/A |
| r24.c0 | Interest receivables/Group [member] | ssmt-mpers:OtherCurrentNontradeFinanceIncomeReceivable | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r24.c1 | Interest receivables/Company [member] | ssmt-mpers:OtherCurrentNontradeFinanceIncomeReceivable | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r25.c0 | Deposits/Group [member] | ssmt-mpers:OtherCurrentNontradeDeposits | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r25.c1 | Deposits/Company [member] | ssmt-mpers:OtherCurrentNontradeDeposits | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r26.c0 | Dividend receivables/Group [member] | ssmt-mpers:OtherCurrentNontradeDividendReceivables | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r26.c1 | Dividend receivables/Company [member] | ssmt-mpers:OtherCurrentNontradeDividendReceivables | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r27.c0 | Lease and hire purchase receivables/Group [member] | ssmt-mpers:OtherCurrentNontradeLeaseAndHirePurchaseReceivables | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r27.c1 | Lease and hire purchase receivables/Company [member] | ssmt-mpers:OtherCurrentNontradeLeaseAndHirePurchaseReceivables | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r28.c0 | Other current non-trade receivables/Group [member] | ssmt-mpers:OtherCurrentMiscellaneousNontradeReceivables | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r28.c1 | Other current non-trade receivables/Company [member] | ssmt-mpers:OtherCurrentMiscellaneousNontradeReceivables | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r29.c0 | Total current non-trade receivables/Group [member] | ssmt-mpers:OtherCurrentNontradeReceivables | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r29.c1 | Total current non-trade receivables/Company [member] | ssmt-mpers:OtherCurrentNontradeReceivables | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r30.c0 | Total other current receivables/Group [member] | ssmt-mpers:OtherCurrentReceivables | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r30.c1 | Total other current receivables/Company [member] | ssmt-mpers:OtherCurrentReceivables | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |
| r31.c0 | Total trade and other current receivables/Group [member] | ifrs-smes:TradeAndOtherCurrentReceivables | xbrli:monetaryItemType | instant | ifrs-smes:ConsolidatedMember | iso4217:MYR |
| r31.c1 | Total trade and other current receivables/Company [member] | ifrs-smes:TradeAndOtherCurrentReceivables | xbrli:monetaryItemType | instant | ifrs-smes:SeparateMember | iso4217:MYR |