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|---|---|---|
 0000070145-20-000022-index-headers.html | 2020-08-07 08:09:19 | |
| 0000070145-20-000022-index.html | 2020-08-07 08:09:19 | |
| 0000070145-20-000022.txt | 2020-08-07 08:09:19 | |
 0000070145-20-000022-xbrl.zip | 90968 | 2020-08-07 08:09:19 |
 exhibit998kimagea151.jpg | 38108 | 2020-08-07 08:09:19 |
| FilingSummary.xml | 1795 | 2020-08-07 08:09:19 |
| Financial_Report.xlsx | 5468 | 2020-08-07 08:09:19 |
| MetaLinks.json | 18010 | 2020-08-07 08:09:19 |
| nfg-20200806.htm | 48792 | 2020-08-07 08:09:19 |
| nfg-20200806.xsd | 2511 | 2020-08-07 08:09:19 |
| nfg-20200806_cal.xml | 792 | 2020-08-07 08:09:19 |
| nfg-20200806_def.xml | 1748 | 2020-08-07 08:09:19 |
| nfg-20200806_htm.xml | 10983 | 2020-08-07 08:09:19 |
| nfg-20200806_lab.xml | 24275 | 2020-08-07 08:09:19 |
| nfg-20200806_pre.xml | 12728 | 2020-08-07 08:09:19 |
| nfg-6302020xexhibit99x.htm | 2673813 | 2020-08-07 08:09:19 |
| R1.htm | 38633 | 2020-08-07 08:09:19 |
| report.css | 2767 | 2020-08-07 08:09:19 |
| Show.js | 1085 | 2020-08-07 08:09:19 |