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| 0000072909-23-000003-index.html | 2023-02-23 14:57:18 | |
| 0000072909-23-000003.txt | 2023-02-23 14:57:18 | |
 0000072909-23-000003-xbrl.zip | 689347 | 2023-02-23 14:57:18 |
| FilingSummary.xml | 46571 | 2023-02-23 14:57:18 |
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| nspw-20221231.htm | 2653561 | 2023-02-23 14:57:18 |
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| report.css | 2767 | 2023-02-23 14:57:18 |
| Show.js | 1085 | 2023-02-23 14:57:18 |