| Notes regarding promissory notes due on balance sheet date | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Notes regarding promissory notes due on balance sheet date [text block] | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Notes regarding promissory notes due on balance sheet date | en | http://disclosure.edinet-fsa.go.jp/jppfs/Consolidated/role/label | http://www.xbrl.org/2003/role/link |
| Notes regarding promissory notes due on semi-annual balance sheet date | en | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |
| Notes regarding promissory notes due on quarterly balance sheet date | en | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedQuarterly/role/label | http://www.xbrl.org/2003/role/link |
| Notes regarding promissory notes due on semi-annual balance sheet date | en | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |
| Notes regarding promissory notes due on quarterly balance sheet date | en | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedQuarterly/role/label | http://www.xbrl.org/2003/role/link |
| 期末日満期手形の会計処理 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 期末日満期手形の会計処理 [テキストブロック] | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| 連結会計年度末日満期手形の会計処理 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/Consolidated/role/label | http://www.xbrl.org/2003/role/link |
| 中間連結会計期間末日満期手形の会計処理 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |
| 四半期連結会計期間末日満期手形の会計処理 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ConsolidatedQuarterly/role/label | http://www.xbrl.org/2003/role/link |
| 中間期末日満期手形の会計処理 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |
| 四半期会計期間末日満期手形の会計処理 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedQuarterly/role/label | http://www.xbrl.org/2003/role/link |