| 受取利息及び受取配当金 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 受取利息及び受取配当金、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 |
| 受取利息及び配当金 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/spf/role/label | http://www.xbrl.org/2003/role/link |
| 受取利息及び配当金 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/edu/role/label | http://www.xbrl.org/2003/role/link |
| Interest and dividend income | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Interest and dividend income-OpeCF | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Interest and dividend income | en | http://disclosure.edinet-fsa.go.jp/jppfs/spf/role/label | http://www.xbrl.org/2003/role/link |
| Interest and dividend income | en | http://disclosure.edinet-fsa.go.jp/jppfs/edu/role/label | http://www.xbrl.org/2003/role/link |