| その他事業営業費 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 営業費 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |
| 営業費 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedQuarterly/role/label | http://www.xbrl.org/2003/role/link |
| その他事業営業費、鉄道事業 | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| その他事業営業費合計 | ja | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| 営業費合計 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/totalLabel | http://www.xbrl.org/2003/role/link |
| 営業費合計 | ja | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedQuarterly/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Operating expenses - other | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Operating expenses | en | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/label | http://www.xbrl.org/2003/role/link |
| Operating expenses | en | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedQuarterly/role/label | http://www.xbrl.org/2003/role/link |
| Operating expenses-other-RWY | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Total operating expenses - other | en | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Total operating expenses | en | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedInterim/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Total operating expenses | en | http://disclosure.edinet-fsa.go.jp/jppfs/NonConsolidatedQuarterly/role/totalLabel | http://www.xbrl.org/2003/role/link |