| The amount of current accruals and current deferred income including current contract liabilities. [Refer: Accruals; Deferred income including contract liabilities] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Total current accruals and current deferred income including current contract liabilities | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Current accruals and current deferred income including current contract liabilities | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |