| 受注工事損失引当金の増減額(△は減少) | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 受注工事損失引当金の増減額(△は減少)、営業活動によるキャッシュ・フロー、造船業 | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Increase (decrease) in provision for loss on construction contracts | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Increase (decrease) in provision for loss on construction contracts-OpeCF-VES | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |