| r0.c0 | RuleNode_53/Group [member] | | | | ifrs-full:ConsolidatedMember | N/A |
| r0.c1 | RuleNode_53/Company [member] | | | | ifrs-full:SeparateMember | N/A |
| r1.c0 | Investments in subsidiaries [abstract]/Group [member] | ssmt-mfrs:InvestmentsInSubsidiariesAbstract | xbrli:stringItemType | duration | ifrs-full:ConsolidatedMember | N/A |
| r1.c1 | Investments in subsidiaries [abstract]/Company [member] | ssmt-mfrs:InvestmentsInSubsidiariesAbstract | xbrli:stringItemType | duration | ifrs-full:SeparateMember | N/A |
| r2.c0 | Unquoted shares, net of impairment losses/Group [member] | ssmt-mfrs:InvestmentsInSubsidiariesUnquotedSharesNetOfImpairmentLosses | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r2.c1 | Unquoted shares, net of impairment losses/Company [member] | ssmt-mfrs:InvestmentsInSubsidiariesUnquotedSharesNetOfImpairmentLosses | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r3.c0 | Quoted shares/Group [member] | ssmt-mfrs:InvestmentsInSubsidiariesQuotedShares | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r3.c1 | Quoted shares/Company [member] | ssmt-mfrs:InvestmentsInSubsidiariesQuotedShares | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r4.c0 | Other investments in subsidiaries, net of impairment losses/Group [member] | ssmt-mfrs:InvestmentsInSubsidiariesOtherInvestmentsNetOfImpairmentLosses | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r4.c1 | Other investments in subsidiaries, net of impairment losses/Company [member] | ssmt-mfrs:InvestmentsInSubsidiariesOtherInvestmentsNetOfImpairmentLosses | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |
| r5.c0 | Total investments in subsidiaries/Group [member] | ifrs-full:InvestmentsInSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:ConsolidatedMember | iso4217:MYR |
| r5.c1 | Total investments in subsidiaries/Company [member] | ifrs-full:InvestmentsInSubsidiaries | xbrli:monetaryItemType | instant | ifrs-full:SeparateMember | iso4217:MYR |