| r0.c0 | RuleNode_242/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_242/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Other non-current assets [abstract]/Group [member] | ssmt-mfrs:OtherNoncurrentAssetsAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Other non-current assets [abstract]/Company [member] | ssmt-mfrs:OtherNoncurrentAssetsAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Prepaid rental of buildings and facilities/Group [member] | ssmt-mfrs:PrepaidRentalForBuildingAndFacilities | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r2.c1 | Prepaid rental of buildings and facilities/Company [member] | ssmt-mfrs:PrepaidRentalForBuildingAndFacilities | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r3.c0 | Prepaid land lease/Group [member] | ssmt-mfrs:PrepaidLandLease | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Prepaid land lease/Company [member] | ssmt-mfrs:PrepaidLandLease | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Other non-current assets/Group [member] | ssmt-mfrs:MiscellaneousOtherNoncurrentAssets | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Other non-current assets/Company [member] | ssmt-mfrs:MiscellaneousOtherNoncurrentAssets | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Total other non-current assets/Group [member] | ifrs-full:OtherNoncurrentAssets | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Total other non-current assets/Company [member] | ifrs-full:OtherNoncurrentAssets | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |