| r0.c0 | RuleNode_173/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_173/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Trade and other current receivables [abstract]/Group [member] | ifrs-full:TradeAndOtherCurrentReceivablesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Trade and other current receivables [abstract]/Company [member] | ifrs-full:TradeAndOtherCurrentReceivablesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Current trade receivables [abstract]/Group [member] | ssmt-mfrs:CurrentTradeReceivablesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r2.c1 | Current trade receivables [abstract]/Company [member] | ssmt-mfrs:CurrentTradeReceivablesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r3.c0 | Trade receivables/Group [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromCustomers | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Trade receivables/Company [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromCustomers | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Trade receivables due from contract customers/Group [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromContractCustomers | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Trade receivables due from contract customers/Company [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromContractCustomers | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Trade receivables due from holding company/Group [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromHoldingCompany | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Trade receivables due from holding company/Company [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromHoldingCompany | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r6.c0 | Trade receivables due from subsidiaries/Group [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r6.c1 | Trade receivables due from subsidiaries/Company [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r7.c0 | Trade receivables due from associates/Group [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromAssociates | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r7.c1 | Trade receivables due from associates/Company [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromAssociates | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r8.c0 | Trade receivables due from joint ventures/Group [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromJointVentures | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r8.c1 | Trade receivables due from joint ventures/Company [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromJointVentures | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r9.c0 | Trade receivables due from other related parties/Group [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r9.c1 | Trade receivables due from other related parties/Company [member] | ssmt-mfrs:CurrentTradeReceivablesDueFromRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r10.c0 | Unearned current carrying charges/Group [member] | ssmt-mfrs:TradeReceivablesUnearnedCurrentCarryingCharges | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r10.c1 | Unearned current carrying charges/Company [member] | ssmt-mfrs:TradeReceivablesUnearnedCurrentCarryingCharges | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r11.c0 | Other current trade receivables/Group [member] | ssmt-mfrs:OtherCurrentTradeReceivables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r11.c1 | Other current trade receivables/Company [member] | ssmt-mfrs:OtherCurrentTradeReceivables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r12.c0 | Total current trade receivables/Group [member] | ifrs-full:CurrentTradeReceivables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r12.c1 | Total current trade receivables/Company [member] | ifrs-full:CurrentTradeReceivables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r13.c0 | Other current receivables [abstract]/Group [member] | ssmt-mfrs:OtherCurrentReceivablesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r13.c1 | Other current receivables [abstract]/Company [member] | ssmt-mfrs:OtherCurrentReceivablesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r14.c0 | Other current receivables due from related parties [abstract]/Group [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromRelatedPartiesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r14.c1 | Other current receivables due from related parties [abstract]/Company [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromRelatedPartiesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r15.c0 | Other receivables due from holding company/Group [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromHoldingCompany | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r15.c1 | Other receivables due from holding company/Company [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromHoldingCompany | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r16.c0 | Other receivables due from subsidiaries/Group [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r16.c1 | Other receivables due from subsidiaries/Company [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r17.c0 | Other receivables due from associates/Group [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromAssociates | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r17.c1 | Other receivables due from associates/Company [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromAssociates | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r18.c0 | Other receivables due from joint ventures/Group [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromJointVentures | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r18.c1 | Other receivables due from joint ventures/Company [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromJointVentures | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r19.c0 | Other receivables due from other related parties/Group [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromOtherRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r19.c1 | Other receivables due from other related parties/Company [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromOtherRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r20.c0 | Total other current receivables due from related parties/Group [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r20.c1 | Total other current receivables due from related parties/Company [member] | ssmt-mfrs:OtherCurrentReceivablesDueFromRelatedParties | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r21.c0 | Current prepayments and current accrued income [abstract]/Group [member] | ssmt-mfrs:OtherCurrentPrepaymentsAndCurrentAccruedIncomeAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r21.c1 | Current prepayments and current accrued income [abstract]/Company [member] | ssmt-mfrs:OtherCurrentPrepaymentsAndCurrentAccruedIncomeAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r22.c0 | Prepayments/Group [member] | ssmt-mfrs:OtherCurrentPrepayments | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r22.c1 | Prepayments/Company [member] | ssmt-mfrs:OtherCurrentPrepayments | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r23.c0 | Accrued income/Group [member] | ssmt-mfrs:OtherCurrentAccruedIncome | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r23.c1 | Accrued income/Company [member] | ssmt-mfrs:OtherCurrentAccruedIncome | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r24.c0 | Total current prepayments and current accrued income/Group [member] | ssmt-mfrs:OtherCurrentPrepaymentsAndCurrentAccruedIncome | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r24.c1 | Total current prepayments and current accrued income/Company [member] | ssmt-mfrs:OtherCurrentPrepaymentsAndCurrentAccruedIncome | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r25.c0 | Current non-trade receivables [abstract]/Group [member] | ssmt-mfrs:OtherCurrentNontradeReceivablesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r25.c1 | Current non-trade receivables [abstract]/Company [member] | ssmt-mfrs:OtherCurrentNontradeReceivablesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r26.c0 | Interest receivables/Group [member] | ssmt-mfrs:OtherCurrentNontradeFinanceIncomeReceivable | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r26.c1 | Interest receivables/Company [member] | ssmt-mfrs:OtherCurrentNontradeFinanceIncomeReceivable | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r27.c0 | Deposits/Group [member] | ssmt-mfrs:OtherCurrentNontradeDeposits | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r27.c1 | Deposits/Company [member] | ssmt-mfrs:OtherCurrentNontradeDeposits | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r28.c0 | Dividend receivables/Group [member] | ssmt-mfrs:OtherCurrentNontradeDividendReceivables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r28.c1 | Dividend receivables/Company [member] | ssmt-mfrs:OtherCurrentNontradeDividendReceivables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r29.c0 | Lease and hire purchase receivables/Group [member] | ssmt-mfrs:OtherCurrentNontradeLeaseAndHirePurchaseReceivables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r29.c1 | Lease and hire purchase receivables/Company [member] | ssmt-mfrs:OtherCurrentNontradeLeaseAndHirePurchaseReceivables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r30.c0 | Other current non-trade receivables/Group [member] | ssmt-mfrs:OtherCurrentMiscellaneousNontradeReceivables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r30.c1 | Other current non-trade receivables/Company [member] | ssmt-mfrs:OtherCurrentMiscellaneousNontradeReceivables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r31.c0 | Total current non-trade receivables/Group [member] | ssmt-mfrs:OtherCurrentNontradeReceivables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r31.c1 | Total current non-trade receivables/Company [member] | ssmt-mfrs:OtherCurrentNontradeReceivables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r32.c0 | Total other current receivables/Group [member] | ifrs-full:OtherCurrentReceivables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r32.c1 | Total other current receivables/Company [member] | ifrs-full:OtherCurrentReceivables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r33.c0 | Total trade and other current receivables/Group [member] | ifrs-full:TradeAndOtherCurrentReceivables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r33.c1 | Total trade and other current receivables/Company [member] | ifrs-full:TradeAndOtherCurrentReceivables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |