| Other comprehensive income, before tax, change in fair value of financial liability attributable to change in credit risk of liability | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| The amount of other comprehensive income, before tax, related to change in the fair value of financial liability attributable to change in the credit risk of the liability. [Refer: Other comprehensive income, before tax; Credit risk [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |