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| 0000072909-18-000006-index.html | 2018-04-27 13:31:29 | |
| 0000072909-18-000006.txt | 2018-04-27 13:31:29 | |
 0000072909-18-000006-xbrl.zip | 188508 | 2018-04-27 13:31:29 |
| FilingSummary.xml | 33984 | 2018-04-27 13:31:29 |
| Financial_Report.xlsx | 65788 | 2018-04-27 13:31:29 |
| nspw-20180331.xml | 1286708 | 2018-04-27 13:31:29 |
| nspw-20180331.xsd | 50129 | 2018-04-27 13:31:29 |
| nspw-20180331_cal.xml | 93128 | 2018-04-27 13:31:29 |
| nspw-20180331_def.xml | 208212 | 2018-04-27 13:31:29 |
| nspw-20180331_lab.xml | 634579 | 2018-04-27 13:31:29 |
| nspw-20180331_pre.xml | 346524 | 2018-04-27 13:31:29 |
| nspw3311810-q.htm | 792390 | 2018-04-27 13:31:29 |
| nspwex3101q12018.htm | 12876 | 2018-04-27 13:31:29 |
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| report.css | 2767 | 2018-04-27 13:31:29 |
| Show.js | 1410 | 2018-04-27 13:31:29 |