| Credit derivative, nominal amount | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Credit derivative, nominal amount at beginning of period | en | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Credit derivative, nominal amount at end of period | en | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |
| The nominal amount of a credit derivative. [Refer: Derivatives [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Derivados de crédito, importe nominal | es | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Derivados de crédito, importe nominal al comienzo del periodo | es | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Derivados de crédito, importe nominal al final del periodo | es | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |