| 借入有価証券代り金の増減額(△は増加) | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 借入有価証券代り金の増減額(△は増加)、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 |
| Decrease (increase) in cash collateral provided for securities borrowed | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Decrease (increase) in cash collateral provided for securities borrowed - OpeCF | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |