| Ordinary profit (loss) | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Ordinary profit (loss) | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Ordinary profit | en | http://www.xbrl.org/2003/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| Ordinary loss | en | http://www.xbrl.org/2003/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| Ordinary profit (loss) | en | http://disclosure.edinet-fsa.go.jp/jppfs/ele/role/label | http://www.xbrl.org/2003/role/link |
| Ordinary profit (loss) | en | http://disclosure.edinet-fsa.go.jp/jppfs/bnk/role/label | http://www.xbrl.org/2003/role/link |
| Ordinary loss | en | http://disclosure.edinet-fsa.go.jp/jppfs/bnk/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| Ordinary profit | en | http://disclosure.edinet-fsa.go.jp/jppfs/bnk/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| Ordinary loss | en | http://disclosure.edinet-fsa.go.jp/jppfs/ele/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| Ordinary profit | en | http://disclosure.edinet-fsa.go.jp/jppfs/ele/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| 経常利益又は経常損失(△) | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 経常利益又は経常損失(△) | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| 経常利益 | ja | http://www.xbrl.org/2003/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| 経常損失(△) | ja | http://www.xbrl.org/2003/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| 当期経常利益又は当期経常損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ele/role/label | http://www.xbrl.org/2003/role/link |
| 経常利益又は経常損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/bnk/role/label | http://www.xbrl.org/2003/role/link |
| 経常損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/bnk/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| 経常利益 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/bnk/role/positiveLabel | http://www.xbrl.org/2003/role/link |
| 当期経常損失(△) | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ele/role/negativeLabel | http://www.xbrl.org/2003/role/link |
| 当期経常利益 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/ele/role/positiveLabel | http://www.xbrl.org/2003/role/link |