| 営業収入 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 営業収入 | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| 営業収入合計 | ja | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Operating revenue | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Operating revenue-2 | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Total operating revenue | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |