| 投資株式の保有目的を純投資以外の目的から純投資目的に変更したもの | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 投資株式の保有目的を純投資以外の目的から純投資目的に変更したもの、投資株式計上額が次に大きい会社 [表示項目] | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Investment shares reclassified from held for purposes other than pure investment to held for pure investment | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Investment shares reclassified from held for purposes other than pure investment to held for pure investment, Second largest holding company [line items] | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |