 | ssmt-mfrs:ContributionFromGovernment | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ssmt-mfrs:WithdrawalOfBankDeposits | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ssmt-mfrs:WithdrawalOfSecuritiesPledgedForBorrowings | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ssmt-mfrs:PaymentsMadeToAcquireNoncontrollingInterest | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:ProceedsFromIssuingShares | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ssmt-mfrs:ProceedsFromRedeemableNoncumulativePreferenceShares | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:DividendsPaidClassifiedAsFinancingActivities | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:InterestPaidClassifiedAsFinancingActivities | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:CashFlowsFromUsedInFinancingActivities | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ssmt-mfrs:ContributionFromGovernment | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ssmt-mfrs:WithdrawalOfBankDeposits | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ssmt-mfrs:WithdrawalOfSecuritiesPledgedForBorrowings | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ssmt-mfrs:PaymentsMadeToAcquireNoncontrollingInterest | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:ProceedsFromIssuingShares | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ssmt-mfrs:ProceedsFromRedeemableNoncumulativePreferenceShares | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:DividendsPaidClassifiedAsFinancingActivities | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:InterestPaidClassifiedAsFinancingActivities | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |
 | ifrs-full:CashFlowsFromUsedInFinancingActivities | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-clbg_2017-12-31/ssmt-fs-clbg_2017-12-31_role-510000 |