| 会計基準等の改正等以外の正当な理由による会計方針の変更 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 会計基準等の改正等以外の正当な理由による会計方針の変更、四半期財務諸表 [テキストブロック] | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Notes - Voluntary changes in accounting policies | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Notes - Voluntary changes in accounting policies, Quarterly financial statements [text block] | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |