| Fund balance restated | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Represents information pertaining to restated balance of fund after impact of changes in accounting standards and other prior period adjustments as at the reporting period. | en | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-mpers-cor_2017-12-31/ReportingDocumentation | http://www.xbrl.org/2003/role/link |
| Represents information pertaining to restated balance of fund after impact of changes in accounting standards and other prior period adjustments as at the reporting period. | 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 |
| Fund balance at beginning of period, restated | 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 |