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|---|---|---|
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| 0000070145-18-000005-index.html | 2018-02-02 14:12:21 | |
| 0000070145-18-000005.txt | 2018-02-02 14:12:21 | |
 0000070145-18-000005-xbrl.zip | 215670 | 2018-02-02 14:12:21 |
| FilingSummary.xml | 27408 | 2018-02-02 14:12:21 |
| Financial_Report.xlsx | 68676 | 2018-02-02 14:12:21 |
| nfg-12312017x10q.htm | 1214859 | 2018-02-02 14:12:21 |
| nfg-12312017xexhibit101.htm | 42686 | 2018-02-02 14:12:21 |
| nfg-12312017xexhibit102.htm | 42423 | 2018-02-02 14:12:21 |
| nfg-12312017xexhibit103.htm | 28471 | 2018-02-02 14:12:21 |
| nfg-12312017xexhibit12.htm | 67900 | 2018-02-02 14:12:21 |
| nfg-12312017xexhibit311.htm | 9870 | 2018-02-02 14:12:21 |
| nfg-12312017xexhibit312.htm | 9694 | 2018-02-02 14:12:21 |
| nfg-12312017xexhibit32.htm | 6065 | 2018-02-02 14:12:21 |
| nfg-12312017xexhibit99.htm | 65411 | 2018-02-02 14:12:21 |
| nfg-20171231.xml | 1493080 | 2018-02-02 14:12:21 |
| nfg-20171231.xsd | 56112 | 2018-02-02 14:12:21 |
| nfg-20171231_cal.xml | 82771 | 2018-02-02 14:12:21 |
| nfg-20171231_def.xml | 266995 | 2018-02-02 14:12:21 |
| nfg-20171231_lab.xml | 705419 | 2018-02-02 14:12:21 |
| nfg-20171231_pre.xml | 396489 | 2018-02-02 14:12:21 |
| R1.htm | 21945 | 2018-02-02 14:12:21 |
| R10.htm | 12597 | 2018-02-02 14:12:21 |
| R11.htm | 8743 | 2018-02-02 14:12:21 |
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| R8.htm | 183512 | 2018-02-02 14:12:21 |
| R9.htm | 86628 | 2018-02-02 14:12:21 |
| report.css | 2767 | 2018-02-02 14:12:21 |
| Show.js | 1410 | 2018-02-02 14:12:21 |