 | ssmt-mfrs:OtherNoncurrentPortionOfLoanFromSubsidiaries | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-mfrs_2017-12-31/ssmt-fs-mfrs_2017-12-31_role-200200x |
 | ssmt-mfrs:OtherNoncurrentPortionOfLoanFromAssociates | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-mfrs_2017-12-31/ssmt-fs-mfrs_2017-12-31_role-200200x |
 | ssmt-mfrs:OtherNoncurrentPortionOfLoanFromJointVentures | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-mfrs_2017-12-31/ssmt-fs-mfrs_2017-12-31_role-200200x |
 | ssmt-mfrs:OtherNoncurrentPortionOfRedeemablePreferenceShares | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-mfrs_2017-12-31/ssmt-fs-mfrs_2017-12-31_role-200200x |
 | ssmt-mfrs:OtherNoncurrentPortionOfMiscellaneousBorrowings | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-mfrs_2017-12-31/ssmt-fs-mfrs_2017-12-31_role-200200x |
 | ifrs-full:NoncurrentPortionOfOtherNoncurrentBorrowings | parent-child | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-mfrs_2017-12-31/ssmt-fs-mfrs_2017-12-31_role-200200x |
 | ssmt-mfrs:OtherNoncurrentPortionOfLoanFromSubsidiaries | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-mfrs_2017-12-31/ssmt-fs-mfrs_2017-12-31_role-210100 |
 | ssmt-mfrs:OtherNoncurrentPortionOfLoanFromAssociates | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-mfrs_2017-12-31/ssmt-fs-mfrs_2017-12-31_role-210100 |
 | ssmt-mfrs:OtherNoncurrentPortionOfLoanFromJointVentures | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-mfrs_2017-12-31/ssmt-fs-mfrs_2017-12-31_role-210100 |
 | ssmt-mfrs:OtherNoncurrentPortionOfRedeemablePreferenceShares | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-mfrs_2017-12-31/ssmt-fs-mfrs_2017-12-31_role-210100 |
 | ssmt-mfrs:OtherNoncurrentPortionOfMiscellaneousBorrowings | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-mfrs_2017-12-31/ssmt-fs-mfrs_2017-12-31_role-210100 |
 | ifrs-full:NoncurrentPortionOfOtherNoncurrentBorrowings | domain-member | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-fs-mfrs_2017-12-31/ssmt-fs-mfrs_2017-12-31_role-210100 |