| Related party transactions, share-based payments transactions | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Report the value, for the reporting period, for share-based payment transactions with related parties. Share-based payment transaction is a transaction in which the entity a. receives goods or services from the supplier of those goods or services (including an employee) in a share- based payment arrangement, or b. incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. | 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 |
| Share-based payment transactions | 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 |