Parent Directory| Name | Size | Last Modified |
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| 0000070145-23-000014-index.html | 2023-05-04 08:42:40 | |
| 0000070145-23-000014.txt | 2023-05-04 08:42:40 | |
 0000070145-23-000014-xbrl.zip | 74366 | 2023-05-04 08:42:40 |
 exhibit998kimagea15a.jpg | 38108 | 2023-05-04 08:42:40 |
| FilingSummary.xml | 1727 | 2023-05-04 08:42:40 |
| Financial_Report.xlsx | 5710 | 2023-05-04 08:42:40 |
| MetaLinks.json | 17801 | 2023-05-04 08:42:40 |
| nfg-20230503.htm | 40527 | 2023-05-04 08:42:40 |
| nfg-20230503.xsd | 1992 | 2023-05-04 08:42:40 |
| nfg-20230503_htm.xml | 11108 | 2023-05-04 08:42:40 |
| nfg-20230503_lab.xml | 24137 | 2023-05-04 08:42:40 |
| nfg-20230503_pre.xml | 12590 | 2023-05-04 08:42:40 |
| nfg-3312023xexhibit99x8k.htm | 1662577 | 2023-05-04 08:42:40 |
| R1.htm | 38108 | 2023-05-04 08:42:40 |
| report.css | 2767 | 2023-05-04 08:42:40 |
| Show.js | 1085 | 2023-05-04 08:42:40 |