| 資産除去債務明細表(該当なし) | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 資産除去債務明細表、連結財務諸表(該当なし) [テキストブロック] | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Annexed consolidated detailed schedule of asset retirement obligations (N/A) | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Annexed consolidated detailed schedule of asset retirement obligations (N/A) [text block] | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |