| Joint ventures where entity is venturer [member] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| This member stands for joint ventures in which the entity is a joint venturer. A venturer is a party to a joint venture and has joint control over that joint venture. [Refer: Joint ventures [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Joint venture in cui l'entità è un joint venturer [member] | it | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Questo membro indica le joint venture in cui l'entità è una società joint venturer. Un joint venturer è un partecipante a una joint venture che abbia il controllo congiunto su quella joint venture. [Rif: Joint venture [member]] | it | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |