| Consolidation adjustments of retained earnings of subsidiaries, associates and joint ventures | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Less: Consolidation adjustments | en | http://www.xbrl.org/2009/role/negatedTerseLabel | http://www.xbrl.org/2003/role/link |
| Report the value, for the reporting period, the consolidation adjustments. | en | http://xbrl.ssm.com.my/role/ssm/rol_ssmt-mpers-cor_2017-12-31/ReportingDocumentation | http://www.xbrl.org/2003/role/link |
| Report the value, for the reporting period, the consolidation adjustments. | 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 |