| Adjustments for amortisation of government grants | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Represents the amount of amortisation of government grants to reconcile profit (loss) to net cash flow from (used in) operating activities. | en | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-mpers-cor_2017-12-31/ReportingDocumentation | http://www.xbrl.org/2003/role/link |
| Represents the amount of amortisation of government grants to reconcile profit (loss) to net cash flow from (used in) operating activities. | en | http://xbrl.ssm.com.my/role/ssm/fs/mpers/lab_rol_ssmt-fs-mpers_2017-12-31/ReportingDocumentation | http://www.xbrl.org/2003/role/link |
| Amortisation of government grants | en | http://xbrl.ssm.com.my/role/ssm/fs/mpers/lab_rol_ssmt-fs-mpers_2017-12-31/ReportingLabel | http://www.xbrl.org/2003/role/link |