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|---|---|---|
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| 0000070145-22-000005-index.html | 2022-02-04 12:52:21 | |
| 0000070145-22-000005.txt | 2022-02-04 12:52:21 | |
 0000070145-22-000005-xbrl.zip | 326839 | 2022-02-04 12:52:21 |
| FilingSummary.xml | 36012 | 2022-02-04 12:52:21 |
| Financial_Report.xlsx | 92064 | 2022-02-04 12:52:21 |
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| nfg-12312021xexhibit101.htm | 41869 | 2022-02-04 12:52:21 |
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| nfg-12312021xexhibit103.htm | 42184 | 2022-02-04 12:52:21 |
| nfg-12312021xexhibit311.htm | 9208 | 2022-02-04 12:52:21 |
| nfg-12312021xexhibit312.htm | 9415 | 2022-02-04 12:52:21 |
| nfg-12312021xexhibit32.htm | 6595 | 2022-02-04 12:52:21 |
| nfg-12312021xexhibit99.htm | 38263 | 2022-02-04 12:52:21 |
| nfg-20211231.htm | 1943662 | 2022-02-04 12:52:21 |
| nfg-20211231.xsd | 52762 | 2022-02-04 12:52:21 |
| nfg-20211231_cal.xml | 72963 | 2022-02-04 12:52:21 |
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| nfg-20211231_lab.xml | 623977 | 2022-02-04 12:52:21 |
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| R1.htm | 53852 | 2022-02-04 12:52:21 |
| R10.htm | 105954 | 2022-02-04 12:52:21 |
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| R9.htm | 142678 | 2022-02-04 12:52:21 |
| report.css | 2767 | 2022-02-04 12:52:21 |
| Show.js | 1085 | 2022-02-04 12:52:21 |