| Unconsolidated subsidiaries controlled by subsidiaries of investment entity [member] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| This member stands for unconsolidated subsidiaries controlled by subsidiaries of the investment entity. [Refer: Disclosure of investment entities [text block]; Subsidiaries [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Controllate non consolidate soggette al controllo di controllate di entità d'investimento [member] | it | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Questo membro indica le controllate non consolidate soggette al controllo di controllate dell'entità d'investimento. [Rif: Informazioni integrative sulle entità d'investimento [text block]; Controllate [member]] | it | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |