| Investments in subsidiaries, joint ventures and associates | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Total investments in subsidiaries, joint ventures and associates | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Associates [member]; Joint ventures [member]; Subsidiaries [member]; Investments in subsidiaries] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Investimentos em subsidiárias, empreendimentos conjuntos e associadas | pt | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| A quantia dos investimentos em subsidiárias, empreendimentos conjuntos e associadas nas demonstrações financeiras separadas de uma entidade. [Consultar: Associadas [member]; Empreendimentos conjuntos [member]; Subsidiárias [member]; Investimentos em subsidiárias] | pt | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |