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| 0000073088-19-000091-index.html | 2019-07-23 18:22:08 | |
| 0000073088-19-000091.txt | 2019-07-23 18:22:08 | |
 0000073088-19-000091-xbrl.zip | 350722 | 2019-07-23 18:22:08 |
| ex311certificationq220.htm | 13899 | 2019-07-23 18:22:08 |
| ex312certificationq220.htm | 13571 | 2019-07-23 18:22:08 |
| ex321certificationq220.htm | 6915 | 2019-07-23 18:22:08 |
| ex322certificationq220.htm | 6842 | 2019-07-23 18:22:08 |
| FilingSummary.xml | 26870 | 2019-07-23 18:22:08 |
| Financial_Report.xlsx | 67847 | 2019-07-23 18:22:08 |
 logoa14.jpg | 77538 | 2019-07-23 18:22:08 |
| MetaLinks.json | 473883 | 2019-07-23 18:22:08 |
| nwe-20190630.xsd | 38142 | 2019-07-23 18:22:08 |
| nwe-20190630_cal.xml | 93626 | 2019-07-23 18:22:08 |
| nwe-20190630_def.xml | 265940 | 2019-07-23 18:22:08 |
| nwe-20190630_lab.xml | 543963 | 2019-07-23 18:22:08 |
| nwe-20190630_pre.xml | 322272 | 2019-07-23 18:22:08 |
| nwe-63019x10q.htm | 2957523 | 2019-07-23 18:22:08 |
| nwe-63019x10q_htm.xml | 2358019 | 2019-07-23 18:22:08 |
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| R9.htm | 17978 | 2019-07-23 18:22:08 |
| report.css | 2767 | 2019-07-23 18:22:08 |
| Show.js | 1085 | 2019-07-23 18:22:08 |