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| 0000070145-19-000004-index.html | 2019-02-01 12:18:25 | |
| 0000070145-19-000004.txt | 2019-02-01 12:18:25 | |
 0000070145-19-000004-xbrl.zip | 263767 | 2019-02-01 12:18:25 |
| FilingSummary.xml | 33527 | 2019-02-01 12:18:25 |
| Financial_Report.xlsx | 83194 | 2019-02-01 12:18:25 |
| nfg-12312018x10q.htm | 1402876 | 2019-02-01 12:18:25 |
| nfg-12312018xexhibit101.htm | 42694 | 2019-02-01 12:18:25 |
| nfg-12312018xexhibit102.htm | 42430 | 2019-02-01 12:18:25 |
| nfg-12312018xexhibit311.htm | 9870 | 2019-02-01 12:18:25 |
| nfg-12312018xexhibit312.htm | 9694 | 2019-02-01 12:18:25 |
| nfg-12312018xexhibit32.htm | 6065 | 2019-02-01 12:18:25 |
| nfg-12312018xexhibit99.htm | 60525 | 2019-02-01 12:18:25 |
| nfg-20181231.xml | 2188369 | 2019-02-01 12:18:25 |
| nfg-20181231.xsd | 66390 | 2019-02-01 12:18:25 |
| nfg-20181231_cal.xml | 88044 | 2019-02-01 12:18:25 |
| nfg-20181231_def.xml | 346312 | 2019-02-01 12:18:25 |
| nfg-20181231_lab.xml | 826770 | 2019-02-01 12:18:25 |
| nfg-20181231_pre.xml | 488230 | 2019-02-01 12:18:25 |
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| report.css | 2767 | 2019-02-01 12:18:25 |
| Show.js | 1085 | 2019-02-01 12:18:25 |