| Other long-term employee benefits | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| The amount of other long-term employee benefits, which are employee benefits (other than post-employment benefits and termination benefits) that are not wholly due within twelve months after the end of the period in which the employees render the related service. Such benefits may include long-term paid absences, jubilee or other long-service benefits, long-term disability benefits, long-term profit-sharing and bonuses and long-term deferred remuneration. [Refer: Employee benefits expense] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Report the value, for the reporting period, of other long-term employee benefits expenses during the reporting period. Other long-term employee benefits generally include, for example: a. long-term compensated absences such as long- service or sabbatical leave; b. long-service benefits; c. long-term disability benefits; d. profit-sharing and bonuses payable twelve months or more after the end of the period in which the employees render the related service; and e. deferred compensation paid twelve months or more after the end of the period in which it is earned. | 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 |