| Domestic investment securities other than investment unit acquisition rights and investment corporation bonds | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Domestic investment securities other than investment unit acquisition rights and investment corporation bonds [text block] | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| 内国投資証券(新投資口予約権証券及び投資法人債券を除く。) | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 子目次に先立つ冒頭記載又は該当ない旨の記載のタグ付けに用いる。 | ja | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| 内国投資証券(新投資口予約権証券及び投資法人債券を除く。) [テキストブロック] | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |