| Other non-current portion of redeemable preference shares | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Report the value, as at the reporting date, the aggregate non-current portion of redeemable shares by whatever name called, which does not entitle the holder thereof to the right to vote at a general meeting or to any right to participate beyond a specified amount in any distribution whether by way of dividend, or on redemption, in a winding up. | en | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-mfrs-cor_2017-12-31/ReportingDocumentation | http://www.xbrl.org/2003/role/link |
| Redeemable preference shares | en | http://xbrl.ssm.com.my/role/ssm/fs/mfrs/lab_rol_ssmt-fs-mfrs_2017-12-31/ReportingLabel | http://www.xbrl.org/2003/role/link |
| Report the value, as at the reporting date, the aggregate non-current portion of redeemable shares by whatever name called, which does not entitle the holder thereof to the right to vote at a general meeting or to any right to participate beyond a specified amount in any distribution whether by way of dividend, or on redemption, in a winding up. | en | http://xbrl.ssm.com.my/role/ssm/fs/mfrs/lab_rol_ssmt-fs-mfrs_2017-12-31/ReportingDocumentation | http://www.xbrl.org/2003/role/link |