| Property, plant and equipment | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Property, plant and equipment at beginning of period | en | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Property, plant and equipment at end of period | en | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |
| Total property, plant and equipment | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Ativos fixos tangíveis | pt | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| A quantia dos ativos tangíveis que: (a) sejam detidos para uso na produção ou fornecimento de bens ou serviços, para arrendamento a outros, ou para fins administrativos; e (b) se espera que sejam usados durante mais do que um período. | pt | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Total dos outros ativos fixos tangíveis | pt | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Ativos fixos tangíveis no início do período | pt | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Ativos fixos tangíveis no final do período | pt | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |