Parent Directory| Name | Size | Last Modified |
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| 0000070145-23-000028-index.html | 2023-08-03 08:13:15 | |
| 0000070145-23-000028.txt | 2023-08-03 08:13:15 | |
 0000070145-23-000028-xbrl.zip | 76476 | 2023-08-03 08:13:15 |
 exhibit998kimagea15a.jpg | 38108 | 2023-08-03 08:13:15 |
| FilingSummary.xml | 1727 | 2023-08-03 08:13:15 |
| Financial_Report.xlsx | 5711 | 2023-08-03 08:13:15 |
| MetaLinks.json | 17703 | 2023-08-03 08:13:15 |
| nfg-20230802.htm | 32407 | 2023-08-03 08:13:15 |
| nfg-20230802.xsd | 1994 | 2023-08-03 08:13:15 |
| nfg-20230802_htm.xml | 2713 | 2023-08-03 08:13:15 |
| nfg-20230802_lab.xml | 24139 | 2023-08-03 08:13:15 |
| nfg-20230802_pre.xml | 12592 | 2023-08-03 08:13:15 |
| nfg-6302023xexhibit99x8k.htm | 1733428 | 2023-08-03 08:13:15 |
| R1.htm | 38110 | 2023-08-03 08:13:15 |
| report.css | 2767 | 2023-08-03 08:13:15 |
| Show.js | 1085 | 2023-08-03 08:13:15 |