| r0.c0 | RuleNode_187/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_187/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Non-current borrowings [abstract]/Group [member] | ifrs-full:NoncurrentPortionOfNoncurrentBorrowingsByTypeAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Non-current borrowings [abstract]/Company [member] | ifrs-full:NoncurrentPortionOfNoncurrentBorrowingsByTypeAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Non-current portion of non-current secured bank loans received [abstract]/Group [member] | ssmt-mfrs:NoncurrentPortionOfNoncurrentSecuredBankLoansReceivedAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r2.c1 | Non-current portion of non-current secured bank loans received [abstract]/Company [member] | ssmt-mfrs:NoncurrentPortionOfNoncurrentSecuredBankLoansReceivedAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r3.c0 | Islamic medium term notes/Group [member] | ssmt-mfrs:NoncurrentPortionOfSecuredIslamicMediumTermNotes | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Islamic medium term notes/Company [member] | ssmt-mfrs:NoncurrentPortionOfSecuredIslamicMediumTermNotes | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Revolving credit and others/Group [member] | ssmt-mfrs:NoncurrentPortionOfSecuredRevolvingCreditAndOthers | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Revolving credit and others/Company [member] | ssmt-mfrs:NoncurrentPortionOfSecuredRevolvingCreditAndOthers | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Other secured bank loans/Group [member] | ssmt-mfrs:OtherNoncurrentSecuredBankLoans | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Other secured bank loans/Company [member] | ssmt-mfrs:OtherNoncurrentSecuredBankLoans | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r6.c0 | Total non-current portion of non-current secured bank loans received/Group [member] | ifrs-full:NoncurrentPortionOfNoncurrentSecuredBankLoansReceived | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r6.c1 | Total non-current portion of non-current secured bank loans received/Company [member] | ifrs-full:NoncurrentPortionOfNoncurrentSecuredBankLoansReceived | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r7.c0 | Non-current portion of non-current unsecured bank loans received [abstract]/Group [member] | ssmt-mfrs:NoncurrentPortionOfNoncurrentUnsecuredBankLoansReceivedAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r7.c1 | Non-current portion of non-current unsecured bank loans received [abstract]/Company [member] | ssmt-mfrs:NoncurrentPortionOfNoncurrentUnsecuredBankLoansReceivedAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r8.c0 | Islamic medium term notes/Group [member] | ssmt-mfrs:NoncurrentPortionOfUnsecuredIslamicMediumTermNotes | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r8.c1 | Islamic medium term notes/Company [member] | ssmt-mfrs:NoncurrentPortionOfUnsecuredIslamicMediumTermNotes | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r9.c0 | Revolving credit and others/Group [member] | ssmt-mfrs:NoncurrentPortionOfUnsecuredRevolvingCreditAndOthers | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r9.c1 | Revolving credit and others/Company [member] | ssmt-mfrs:NoncurrentPortionOfUnsecuredRevolvingCreditAndOthers | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r10.c0 | Other unsecured bank loans/Group [member] | ssmt-mfrs:OtherNoncurrentUnsecuredBankLoans | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r10.c1 | Other unsecured bank loans/Company [member] | ssmt-mfrs:OtherNoncurrentUnsecuredBankLoans | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r11.c0 | Total non-current portion of non-current unsecured bank loans received/Group [member] | ifrs-full:NoncurrentPortionOfNoncurrentUnsecuredBankLoansReceived | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r11.c1 | Total non-current portion of non-current unsecured bank loans received/Company [member] | ifrs-full:NoncurrentPortionOfNoncurrentUnsecuredBankLoansReceived | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r12.c0 | Non-current portion of secured bonds/sukuk/loan stock/Group [member] | ssmt-mfrs:NoncurrentPortionOfSecuredBondsSukukAndLoanStock | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r12.c1 | Non-current portion of secured bonds/sukuk/loan stock/Company [member] | ssmt-mfrs:NoncurrentPortionOfSecuredBondsSukukAndLoanStock | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r13.c0 | Non-current portion of unsecured bonds/sukuk/loan stock/Group [member] | ssmt-mfrs:NoncurrentPortionOfUnsecuredBondsSukukAndLoanStock | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r13.c1 | Non-current portion of unsecured bonds/sukuk/loan stock/Company [member] | ssmt-mfrs:NoncurrentPortionOfUnsecuredBondsSukukAndLoanStock | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r14.c0 | Other non-current borrowings/Group [member] | ifrs-full:NoncurrentPortionOfOtherNoncurrentBorrowings | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r14.c1 | Other non-current borrowings/Company [member] | ifrs-full:NoncurrentPortionOfOtherNoncurrentBorrowings | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r15.c0 | Total non-current borrowings/Group [member] | ifrs-full:LongtermBorrowings | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r15.c1 | Total non-current borrowings/Company [member] | ifrs-full:LongtermBorrowings | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |