| Credit derivative, fair value | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Credit derivative, fair value at beginning of period | en | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Credit derivative, fair value at end of period | en | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |
| The fair value of a credit derivative. [Refer: At fair value [member]; Derivatives [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Derivado de crédito, justo valor | pt | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| O justo valor de um derivado de crédito. [Consultar: Pelo justo valor [member]; Derivados [member]] | pt | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Derivado de crédito, justo valor no início do período | pt | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Derivado de crédito, justo valor no final do período | pt | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |