| 特別法上の準備金 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 特別法上の準備金 | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| 特別法上の準備金合計 | ja | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| 特別法上の準備金計 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/sec/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Reserves under special laws | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Reserves under special laws-1 | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Total reserves under special laws | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Total reserves under special laws | en | http://disclosure.edinet-fsa.go.jp/jppfs/sec/role/totalLabel | http://www.xbrl.org/2003/role/link |