| 会計上の見積りの変更と区別することが困難な会計方針の変更 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 会計上の見積りの変更と区別することが困難な会計方針の変更、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 - Changes in accounting policies which are difficult to distinguish from changes in accounting estimates | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Notes - Changes in accounting policies which are difficult to distinguish from changes in accounting estimates, Quarterly financial statements [text block] | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |