| Publisher | 国土交通省 | http://www.xbrl.org/2003/role/reference |
| Name | 高速道路事業等会計規則 | http://www.xbrl.org/2003/role/reference |
| IssueDate | 2015-04-28 | http://www.xbrl.org/2003/role/reference |
| Appendix | 別表第二 第3号様式 | http://www.xbrl.org/2003/role/reference |
| Publisher | 内閣府 | http://www.xbrl.org/2003/role/reference |
| Name | 財務諸表等規則 | http://www.xbrl.org/2003/role/reference |
| IssueDate | 2019-05-07 | http://www.xbrl.org/2003/role/reference |
| Appendix | 様式第8号 | http://www.xbrl.org/2003/role/reference |
| Publisher | 内閣府 | http://www.xbrl.org/2003/role/reference |
| Name | 中間財務諸表等規則 | http://www.xbrl.org/2003/role/reference |
| IssueDate | 2019-05-07 | http://www.xbrl.org/2003/role/reference |
| Appendix | 様式第7号 | http://www.xbrl.org/2003/role/reference |
| Publisher | 内閣府 | http://www.xbrl.org/2003/role/reference |
| Name | 四半期財務諸表等規則 | http://www.xbrl.org/2003/role/reference |
| IssueDate | 2019-05-07 | http://www.xbrl.org/2003/role/reference |
| Appendix | 様式第5号 | http://www.xbrl.org/2003/role/reference |
| Publisher | 内閣府 | http://www.xbrl.org/2003/role/reference |
| Name | 連結財務諸表規則 | http://www.xbrl.org/2003/role/reference |
| IssueDate | 2019-05-07 | http://www.xbrl.org/2003/role/reference |
| Appendix | 様式第7号 | http://www.xbrl.org/2003/role/reference |
| Publisher | 内閣府 | http://www.xbrl.org/2003/role/reference |
| Name | 中間連結財務諸表規則 | http://www.xbrl.org/2003/role/reference |
| IssueDate | 2019-05-07 | http://www.xbrl.org/2003/role/reference |
| Appendix | 様式第7号 | http://www.xbrl.org/2003/role/reference |
| Publisher | 内閣府 | http://www.xbrl.org/2003/role/reference |
| Name | 四半期連結財務諸表規則 | http://www.xbrl.org/2003/role/reference |
| IssueDate | 2019-05-07 | http://www.xbrl.org/2003/role/reference |
| Appendix | 様式第5号 | http://www.xbrl.org/2003/role/reference |
| IndustryAbbreviation | cte | http://www.xbrl.org/2003/role/reference |