| Contingent liabilities related to joint ventures [member] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| This member stands for contingent liabilities that are related to joint ventures. [Refer: Contingent liabilities [member]; Joint ventures [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Passivos contingentes relacionados com empreendimentos conjuntos [member] | pt | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Este membro representa os passivos contingentes relacionados com empreendimentos conjuntos. [Consultar: Passivos contingentes [member]; Empreendimentos conjuntos [member]] | pt | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |