| Trading securities [member] | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| This member stands for financial instruments that (a) are acquired or incurred principally for the purpose of selling or repurchasing it in the near term; or (b) on initial recognition are part of a portfolio of identified financial instruments that are managed together and for which there is evidence of a recent actual pattern of short-term profit-taking. [Refer: Financial instruments, class [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Títulos de negociação [member] | pt | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Este membro representa os instrumentos financeiros que (a) são adquiridos ou incorridos com o objetivo principal de serem vendidos ou recomprados num prazo muito curto; ou (b) no reconhecimento inicial fazem parte de uma carteira de instrumentos financeiros identificados que são geridos em conjunto e relativamente aos quais existem indícios de um perfil real recente de lucros a curto prazo. [Consultar: Instrumentos financeiros, classe [member]] | pt | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |