| r0.c0 | RuleNode_420/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_420/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Current borrowings [abstract]/Group [member] | ssmt-mfrs:CurrentBorrowingsAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Current borrowings [abstract]/Company [member] | ssmt-mfrs:CurrentBorrowingsAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Current secured bank loans received and current portion of non-current secured bank loans received [abstract]/Group [member] | ssmt-mfrs:CurrentSecuredBankLoansReceivedAndCurrentPortionOfNoncurrentSecuredBankLoansReceivedAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r2.c1 | Current secured bank loans received and current portion of non-current secured bank loans received [abstract]/Company [member] | ssmt-mfrs:CurrentSecuredBankLoansReceivedAndCurrentPortionOfNoncurrentSecuredBankLoansReceivedAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r3.c0 | Bankers' acceptance/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredBankersAcceptance | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Bankers' acceptance/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredBankersAcceptance | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Bank overdrafts/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredBankOverdrafts | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Bank overdrafts/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredBankOverdrafts | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Trade financing facilities/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredTradeFinancingFacilities | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Trade financing facilities/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredTradeFinancingFacilities | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r6.c0 | Term loans/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredTermLoans | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r6.c1 | Term loans/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredTermLoans | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r7.c0 | Islamic financing facilities/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredIslamicFinancingFacilities | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r7.c1 | Islamic financing facilities/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredIslamicFinancingFacilities | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r8.c0 | Hire purchase and finance lease liabilities/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredHirePurchaseAndFinanceLeaseLiabilities | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r8.c1 | Hire purchase and finance lease liabilities/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredHirePurchaseAndFinanceLeaseLiabilities | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r9.c0 | Islamic medium term notes/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredIslamicMediumTermNotes | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r9.c1 | Islamic medium term notes/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredIslamicMediumTermNotes | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r10.c0 | Sukuk/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredSukuk | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r10.c1 | Sukuk/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredSukuk | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r11.c0 | Revolving credit and others/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredRevolvingCreditAndOthers | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r11.c1 | Revolving credit and others/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredRevolvingCreditAndOthers | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r12.c0 | Other secured bank loans received/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredOtherBankLoanReceived | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r12.c1 | Other secured bank loans received/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentSecuredOtherBankLoanReceived | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r13.c0 | Total current secured bank loans received and current portion of non-current secured bank loans received/Group [member] | ifrs-full:CurrentSecuredBankLoansReceivedAndCurrentPortionOfNoncurrentSecuredBankLoansReceived | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r13.c1 | Total current secured bank loans received and current portion of non-current secured bank loans received/Company [member] | ifrs-full:CurrentSecuredBankLoansReceivedAndCurrentPortionOfNoncurrentSecuredBankLoansReceived | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r14.c0 | Current unsecured bank loans received and current portion of non-current unsecured bank loans received [abstract]/Group [member] | ssmt-mfrs:CurrentUnsecuredBankLoansReceivedAndCurrentPortionOfNoncurrentUnsecuredBankLoansReceivedAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r14.c1 | Current unsecured bank loans received and current portion of non-current unsecured bank loans received [abstract]/Company [member] | ssmt-mfrs:CurrentUnsecuredBankLoansReceivedAndCurrentPortionOfNoncurrentUnsecuredBankLoansReceivedAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r15.c0 | Block discounting payables/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredBlockDiscountingPayables | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r15.c1 | Block discounting payables/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredBlockDiscountingPayables | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r16.c0 | Term loans/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredTermLoans | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r16.c1 | Term loans/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredTermLoans | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r17.c0 | Irredeemable convertible unsecured loan stocks (ICULS)/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredIrredeemableConvertibleUnsecuredLoanStocks | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r17.c1 | Irredeemable convertible unsecured loan stocks (ICULS)/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredIrredeemableConvertibleUnsecuredLoanStocks | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r18.c0 | Islamic financing facilities/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredIslamicFinancingFacilities | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r18.c1 | Islamic financing facilities/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredIslamicFinancingFacilities | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r19.c0 | Hire purchase and finance lease liabilities/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredHirePurchaseAndFinanceLeaseLiabilities | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r19.c1 | Hire purchase and finance lease liabilities/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredHirePurchaseAndFinanceLeaseLiabilities | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r20.c0 | Islamic medium term notes/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredIslamicMediumTermNotes | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r20.c1 | Islamic medium term notes/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredIslamicMediumTermNotes | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r21.c0 | Sukuk/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredSukuk | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r21.c1 | Sukuk/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredSukuk | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r22.c0 | Revolving credit and others/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredRevolvingCreditAndOthers | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r22.c1 | Revolving credit and others/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredRevolvingCreditAndOthers | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r23.c0 | Other unsecured bank loans received/Group [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredOtherBankLoansReceived | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r23.c1 | Other unsecured bank loans received/Company [member] | ssmt-mfrs:CurrentPortionOfNoncurrentUnsecuredOtherBankLoansReceived | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r24.c0 | Total current unsecured bank loans received and current portion of non-current unsecured bank loans received/Group [member] | ifrs-full:CurrentUnsecuredBankLoansReceivedAndCurrentPortionOfNoncurrentUnsecuredBankLoansReceived | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r24.c1 | Total current unsecured bank loans received and current portion of non-current unsecured bank loans received/Company [member] | ifrs-full:CurrentUnsecuredBankLoansReceivedAndCurrentPortionOfNoncurrentUnsecuredBankLoansReceived | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r25.c0 | Current portion of secured bonds/sukuk/loan stocks [abstract]/Group [member] | ssmt-mfrs:CurrentPortionOfSecuredBondsSukukAndLoanStocksAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r25.c1 | Current portion of secured bonds/sukuk/loan stocks [abstract]/Company [member] | ssmt-mfrs:CurrentPortionOfSecuredBondsSukukAndLoanStocksAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r26.c0 | Bonds/Group [member] | ssmt-mfrs:CurrentPortionOfSecuredBonds | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r26.c1 | Bonds/Company [member] | ssmt-mfrs:CurrentPortionOfSecuredBonds | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r27.c0 | Sukuk/Group [member] | ssmt-mfrs:CurrentPortionOfSecuredSukukAsPerShariahCommittee | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r27.c1 | Sukuk/Company [member] | ssmt-mfrs:CurrentPortionOfSecuredSukukAsPerShariahCommittee | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r28.c0 | Medium term notes/Group [member] | ssmt-mfrs:CurrentPortionOfSecuredMediumTermNotes | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r28.c1 | Medium term notes/Company [member] | ssmt-mfrs:CurrentPortionOfSecuredMediumTermNotes | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r29.c0 | Loan stocks/Group [member] | ssmt-mfrs:CurrentPortionOfSecuredLoanStocks | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r29.c1 | Loan stocks/Company [member] | ssmt-mfrs:CurrentPortionOfSecuredLoanStocks | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r30.c0 | Preference shares/Group [member] | ssmt-mfrs:CurrentPortionOfSecuredPreferenceShares | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r30.c1 | Preference shares/Company [member] | ssmt-mfrs:CurrentPortionOfSecuredPreferenceShares | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r31.c0 | Total current portion of secured bonds/sukuk/loan stocks/Group [member] | ssmt-mfrs:CurrentPortionOfSecuredBondsSukukAndLoanStocks | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r31.c1 | Total current portion of secured bonds/sukuk/loan stocks/Company [member] | ssmt-mfrs:CurrentPortionOfSecuredBondsSukukAndLoanStocks | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r32.c0 | Current portion of unsecured bonds/sukuk/loan stocks [abstract]/Group [member] | ssmt-mfrs:CurrentPortionOfUnsecuredBondsSukukAndLoanStocksAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r32.c1 | Current portion of unsecured bonds/sukuk/loan stocks [abstract]/Company [member] | ssmt-mfrs:CurrentPortionOfUnsecuredBondsSukukAndLoanStocksAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | iso4217:MYR |
| r33.c0 | Bonds/Group [member] | ssmt-mfrs:CurrentPortionOfUnsecuredBonds | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r33.c1 | Bonds/Company [member] | ssmt-mfrs:CurrentPortionOfUnsecuredBonds | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r34.c0 | Sukuk/Group [member] | ssmt-mfrs:CurrentPortionOfUnsecuredSukukAsPerShariahCommittee | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r34.c1 | Sukuk/Company [member] | ssmt-mfrs:CurrentPortionOfUnsecuredSukukAsPerShariahCommittee | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r35.c0 | Medium term notes/Group [member] | ssmt-mfrs:CurrentPortionOfUnsecuredMediumTermNotes | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r35.c1 | Medium term notes/Company [member] | ssmt-mfrs:CurrentPortionOfUnsecuredMediumTermNotes | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r36.c0 | Loan stocks/Group [member] | ssmt-mfrs:CurrentPortionOfUnsecuredLoanStocks | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r36.c1 | Loan stocks/Company [member] | ssmt-mfrs:CurrentPortionOfUnsecuredLoanStocks | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r37.c0 | Preference shares/Group [member] | ssmt-mfrs:CurrentPortionOfUnsecuredPreferenceShares | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r37.c1 | Preference shares/Company [member] | ssmt-mfrs:CurrentPortionOfUnsecuredPreferenceShares | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r38.c0 | Total current portion of unsecured bonds/sukuk/loan stocks/Group [member] | ssmt-mfrs:CurrentPortionOfUnsecuredBondsSukukAndLoanStock | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r38.c1 | Total current portion of unsecured bonds/sukuk/loan stocks/Company [member] | ssmt-mfrs:CurrentPortionOfUnsecuredBondsSukukAndLoanStock | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r39.c0 | Other current borrowings [abstract]/Group [member] | ssmt-mfrs:OtherCurrentBorrowingsAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r39.c1 | Other current borrowings [abstract]/Company [member] | ssmt-mfrs:OtherCurrentBorrowingsAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r40.c0 | Trade loans/Group [member] | ssmt-mfrs:OtherCurrentPortionOfTradeLoans | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r40.c1 | Trade loans/Company [member] | ssmt-mfrs:OtherCurrentPortionOfTradeLoans | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r41.c0 | Loan from subsidiaries/Group [member] | ssmt-mfrs:OtherCurrentPortionOfLoanFromSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r41.c1 | Loan from subsidiaries/Company [member] | ssmt-mfrs:OtherCurrentPortionOfLoanFromSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r42.c0 | Loan from associates/Group [member] | ssmt-mfrs:OtherCurrentPortionOfLoanFromAssociates | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r42.c1 | Loan from associates/Company [member] | ssmt-mfrs:OtherCurrentPortionOfLoanFromAssociates | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r43.c0 | Loan from joint ventures/Group [member] | ssmt-mfrs:OtherCurrentPortionOfLoanFromJointVentures | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r43.c1 | Loan from joint ventures/Company [member] | ssmt-mfrs:OtherCurrentPortionOfLoanFromJointVentures | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r44.c0 | Redeemable preference shares/Group [member] | ssmt-mfrs:OtherCurrentPortionOfRedeemablePreferenceShares | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r44.c1 | Redeemable preference shares/Company [member] | ssmt-mfrs:OtherCurrentPortionOfRedeemablePreferenceShares | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r45.c0 | Other current borrowings/Group [member] | ssmt-mfrs:OtherCurrentPortionOfMiscellaneousBorrowings | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r45.c1 | Other current borrowings/Company [member] | ssmt-mfrs:OtherCurrentPortionOfMiscellaneousBorrowings | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r46.c0 | Total other current borrowings/Group [member] | ifrs-full:OtherCurrentBorrowingsAndCurrentPortionOfOtherNoncurrentBorrowings | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r46.c1 | Total other current borrowings/Company [member] | ifrs-full:OtherCurrentBorrowingsAndCurrentPortionOfOtherNoncurrentBorrowings | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r47.c0 | Total current borrowings/Group [member] | ifrs-full:ShorttermBorrowings | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r47.c1 | Total current borrowings/Company [member] | ifrs-full:ShorttermBorrowings | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |