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| 0000702165-20-000042-index.html | 2020-10-28 14:46:34 | |
| 0000702165-20-000042.txt | 2020-10-28 14:46:34 | |
 0000702165-20-000042-xbrl.zip | 214422 | 2020-10-28 14:46:34 |
| FilingSummary.xml | 27785 | 2020-10-28 14:46:34 |
| Financial_Report.xlsx | 60706 | 2020-10-28 14:46:34 |
| MetaLinks.json | 471412 | 2020-10-28 14:46:34 |
| nsc-20200930.htm | 1254203 | 2020-10-28 14:46:34 |
| nsc-20200930.xsd | 34023 | 2020-10-28 14:46:34 |
| nsc-20200930_cal.xml | 61581 | 2020-10-28 14:46:34 |
| nsc-20200930_def.xml | 143186 | 2020-10-28 14:46:34 |
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| nsc-20200930_htm.xml | 892103 | 2020-10-28 14:46:34 |
| nsc-20200930_lab.xml | 409998 | 2020-10-28 14:46:34 |
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| nsc093020exhibit31a.htm | 9980 | 2020-10-28 14:46:34 |
| nsc093020exhibit31b.htm | 9961 | 2020-10-28 14:46:34 |
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| report.css | 2767 | 2020-10-28 14:46:34 |
| Show.js | 1085 | 2020-10-28 14:46:34 |