| 無形固定資産除売却損益(△は益) | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 無形固定資産除売却損益(△は益) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/bnk/role/label | http://www.xbrl.org/2003/role/link |
| 無形固定資産除売却損益(△は益)、営業活動によるキャッシュ・フロー | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Loss (gain) on sales and retirement of intangible assets | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Loss (gain) on sales and retirement of intangible fixed assets | en | http://disclosure.edinet-fsa.go.jp/jppfs/bnk/role/label | http://www.xbrl.org/2003/role/link |
| Loss (gain) on sales and retirement of intangible assets-OpeCF | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |