| The amount of income tax relating to amounts recognised in other comprehensive income in relation to change in value of time value of options. [Refer: Reserve of change in value of time value of options; Other comprehensive income] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Income tax relating to change in value of time value of options included in other comprehensive income | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Income tax relating to change in value of time value of options included in other comprehensive income | en | http://www.xbrl.org/2009/role/negatedLabel | http://www.xbrl.org/2003/role/link |