| 資産除去債務明細表の記載を省略している旨及びその理由 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 資産除去債務明細表の記載を省略している旨及びその理由、連結財務諸表 | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Description of fact and reason why annexed detailed schedule of asset retirement obligations is not presented | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Description of fact and reason why annexed consolidated detailed schedule of asset retirement obligations is not presented | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |