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| 0000702165-20-000033-index.html | 2020-07-29 14:44:38 | |
| 0000702165-20-000033.txt | 2020-07-29 14:44:38 | |
 0000702165-20-000033-xbrl.zip | 271361 | 2020-07-29 14:44:38 |
| FilingSummary.xml | 27676 | 2020-07-29 14:44:38 |
| Financial_Report.xlsx | 59563 | 2020-07-29 14:44:38 |
| MetaLinks.json | 463391 | 2020-07-29 14:44:38 |
| nsc-20200630.htm | 1807419 | 2020-07-29 14:44:38 |
| nsc-20200630.xsd | 33498 | 2020-07-29 14:44:38 |
| nsc-20200630_cal.xml | 60759 | 2020-07-29 14:44:38 |
| nsc-20200630_def.xml | 139208 | 2020-07-29 14:44:38 |
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| nsc-20200630_htm.xml | 1185350 | 2020-07-29 14:44:38 |
| nsc-20200630_lab.xml | 402815 | 2020-07-29 14:44:38 |
| nsc-20200630_pre.xml | 254524 | 2020-07-29 14:44:38 |
| nsc063020exhibit101.htm | 149981 | 2020-07-29 14:44:38 |
| nsc063020exhibit102.htm | 108101 | 2020-07-29 14:44:38 |
| nsc063020exhibit31a.htm | 11736 | 2020-07-29 14:44:38 |
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| nsc063020exhibit32.htm | 9603 | 2020-07-29 14:44:38 |
| nsc063020exhibit3i.htm | 98100 | 2020-07-29 14:44:38 |
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| report.css | 2767 | 2020-07-29 14:44:38 |
| Show.js | 1085 | 2020-07-29 14:44:38 |