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| 0000070145-21-000012-index.html | 2021-05-07 12:52:07 | |
| 0000070145-21-000012.txt | 2021-05-07 12:52:07 | |
 0000070145-21-000012-xbrl.zip | 381400 | 2021-05-07 12:52:07 |
| FilingSummary.xml | 35001 | 2021-05-07 12:52:07 |
| Financial_Report.xlsx | 100341 | 2021-05-07 12:52:07 |
| MetaLinks.json | 710121 | 2021-05-07 12:52:07 |
| nfg-20210331.htm | 2777506 | 2021-05-07 12:52:07 |
| nfg-20210331.xsd | 57414 | 2021-05-07 12:52:07 |
| nfg-20210331_cal.xml | 97015 | 2021-05-07 12:52:07 |
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| nfg-20210331_lab.xml | 693653 | 2021-05-07 12:52:07 |
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| nfg-3312021xexhibit312.htm | 9409 | 2021-05-07 12:52:07 |
| nfg-3312021xexhibit32.htm | 6586 | 2021-05-07 12:52:07 |
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| report.css | 2767 | 2021-05-07 12:52:07 |
| Show.js | 1085 | 2021-05-07 12:52:07 |