| 貸出金のうち破綻先債権及び延滞債権に関する注記 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 貸出金のうち破綻先債権及び延滞債権に関する注記、銀行業 [テキストブロック] | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Notes regarding loans to bankrupt obligors and non-accrual loans | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Notes regarding loans to bankrupt obligors and non-accrual loans-BNK [text block] | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |