Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000072207-19-000018-index-headers.html | 2019-02-19 12:55:35 | |
| 0000072207-19-000018-index.html | 2019-02-19 12:55:35 | |
| 0000072207-19-000018.txt | 2019-02-19 12:55:35 | |
 0000072207-19-000018-xbrl.zip | 731211 | 2019-02-19 12:55:35 |
 a2018operatingactivitiesandc.jpg | 52491 | 2019-02-19 12:55:35 |
 a5yrscumulativetotalreturn.jpg | 38224 | 2019-02-19 12:55:35 |
 emedmapa12.jpg | 77476 | 2019-02-19 12:55:35 |
| FilingSummary.xml | 57720 | 2019-02-19 12:55:35 |
| Financial_Report.xlsx | 165110 | 2019-02-19 12:55:35 |
 image0a93.jpg | 37529 | 2019-02-19 12:55:35 |
| MetaLinks.json | 1122124 | 2019-02-19 12:55:35 |
| nbl-20181231.xsd | 113058 | 2019-02-19 12:55:35 |
| nbl-20181231x10k.htm | 6565473 | 2019-02-19 12:55:35 |
| nbl-20181231x10kxex1037.htm | 27705 | 2019-02-19 12:55:35 |
| nbl-20181231x10kxex1038.htm | 27844 | 2019-02-19 12:55:35 |
| nbl-20181231x10kxex211.htm | 87170 | 2019-02-19 12:55:35 |
| nbl-20181231x10kxex231.htm | 4091 | 2019-02-19 12:55:35 |
| nbl-20181231x10kxex232.htm | 10494 | 2019-02-19 12:55:35 |
| nbl-20181231x10kxex311.htm | 13030 | 2019-02-19 12:55:35 |
| nbl-20181231x10kxex312.htm | 13268 | 2019-02-19 12:55:35 |
| nbl-20181231x10kxex32.htm | 115939 | 2019-02-19 12:55:35 |
| nbl-20181231x10kxex321.htm | 6809 | 2019-02-19 12:55:35 |
| nbl-20181231x10kxex322.htm | 6868 | 2019-02-19 12:55:35 |
| nbl-20181231x10kxex991.htm | 41428 | 2019-02-19 12:55:35 |
| nbl-20181231x10k_htm.xml | 5008797 | 2019-02-19 12:55:35 |
| nbl-20181231_cal.xml | 165670 | 2019-02-19 12:55:35 |
| nbl-20181231_def.xml | 669295 | 2019-02-19 12:55:35 |
| nbl-20181231_lab.xml | 1464080 | 2019-02-19 12:55:35 |
| nbl-20181231_pre.xml | 879933 | 2019-02-19 12:55:35 |
 nblxorgupdatednew2.jpg | 121691 | 2019-02-19 12:55:35 |
 nsailogo1stpage2015v2001a03.jpg | 15924 | 2019-02-19 12:55:35 |
 nsailogo1stpage2015v2a04.jpg | 38516 | 2019-02-19 12:55:35 |
 nsailogo2ndpage2015v2a04.jpg | 14017 | 2019-02-19 12:55:35 |
 piesalesvolsandprove.jpg | 65788 | 2019-02-19 12:55:35 |
| R1.htm | 33178 | 2019-02-19 12:55:35 |
| R10.htm | 441516 | 2019-02-19 12:55:35 |
| R11.htm | 30122 | 2019-02-19 12:55:35 |
| R12.htm | 94732 | 2019-02-19 12:55:35 |
| R13.htm | 6577 | 2019-02-19 12:55:35 |
| R14.htm | 108022 | 2019-02-19 12:55:35 |
| R15.htm | 23779 | 2019-02-19 12:55:35 |
| R16.htm | 100314 | 2019-02-19 12:55:35 |
| R17.htm | 50763 | 2019-02-19 12:55:35 |
| R18.htm | 59421 | 2019-02-19 12:55:35 |
| R19.htm | 155175 | 2019-02-19 12:55:35 |
| R2.htm | 74930 | 2019-02-19 12:55:35 |
| R20.htm | 126647 | 2019-02-19 12:55:35 |
| R21.htm | 86947 | 2019-02-19 12:55:35 |
| R22.htm | 55564 | 2019-02-19 12:55:35 |
| R23.htm | 66437 | 2019-02-19 12:55:35 |
| R24.htm | 159032 | 2019-02-19 12:55:35 |
| R25.htm | 125089 | 2019-02-19 12:55:35 |
| R26.htm | 196090 | 2019-02-19 12:55:35 |
| R27.htm | 442124 | 2019-02-19 12:55:35 |
| R28.htm | 9678 | 2019-02-19 12:55:35 |
| R29.htm | 41597 | 2019-02-19 12:55:35 |
| R3.htm | 77264 | 2019-02-19 12:55:35 |
| R30.htm | 108187 | 2019-02-19 12:55:35 |
| R31.htm | 17862 | 2019-02-19 12:55:35 |
| R32.htm | 86069 | 2019-02-19 12:55:35 |
| R33.htm | 43251 | 2019-02-19 12:55:35 |
| R34.htm | 45125 | 2019-02-19 12:55:35 |
| R35.htm | 139910 | 2019-02-19 12:55:35 |
| R36.htm | 127320 | 2019-02-19 12:55:35 |
| R37.htm | 75317 | 2019-02-19 12:55:35 |
| R38.htm | 49905 | 2019-02-19 12:55:35 |
| R39.htm | 65626 | 2019-02-19 12:55:35 |
| R4.htm | 17076 | 2019-02-19 12:55:35 |
| R40.htm | 140978 | 2019-02-19 12:55:35 |
| R41.htm | 38259 | 2019-02-19 12:55:35 |
| R42.htm | 62573 | 2019-02-19 12:55:35 |
| R43.htm | 95337 | 2019-02-19 12:55:35 |
| R44.htm | 12363 | 2019-02-19 12:55:35 |
| R45.htm | 11245 | 2019-02-19 12:55:35 |
| R46.htm | 202599 | 2019-02-19 12:55:35 |
| R47.htm | 18741 | 2019-02-19 12:55:35 |
| R48.htm | 13809 | 2019-02-19 12:55:35 |
| R49.htm | 11876 | 2019-02-19 12:55:35 |
| R5.htm | 113006 | 2019-02-19 12:55:35 |
| R50.htm | 473015 | 2019-02-19 12:55:35 |
| R51.htm | 24831 | 2019-02-19 12:55:35 |
| R52.htm | 24350 | 2019-02-19 12:55:35 |
| R53.htm | 14855 | 2019-02-19 12:55:35 |
| R54.htm | 8993 | 2019-02-19 12:55:35 |
| R55.htm | 28792 | 2019-02-19 12:55:35 |
| R56.htm | 61131 | 2019-02-19 12:55:35 |
| R57.htm | 15184 | 2019-02-19 12:55:35 |
| R58.htm | 12742 | 2019-02-19 12:55:35 |
| R59.htm | 15841 | 2019-02-19 12:55:35 |
| R6.htm | 45560 | 2019-02-19 12:55:35 |
| R60.htm | 47113 | 2019-02-19 12:55:35 |
| R61.htm | 63400 | 2019-02-19 12:55:35 |
| R62.htm | 119100 | 2019-02-19 12:55:35 |
| R63.htm | 18905 | 2019-02-19 12:55:35 |
| R64.htm | 28322 | 2019-02-19 12:55:35 |
| R65.htm | 13710 | 2019-02-19 12:55:35 |
| R66.htm | 16870 | 2019-02-19 12:55:35 |
| R67.htm | 40700 | 2019-02-19 12:55:35 |
| R68.htm | 33889 | 2019-02-19 12:55:35 |
| R69.htm | 112461 | 2019-02-19 12:55:35 |
| R7.htm | 4619 | 2019-02-19 12:55:35 |
| R70.htm | 9739 | 2019-02-19 12:55:35 |
| R71.htm | 73547 | 2019-02-19 12:55:35 |
| R72.htm | 39380 | 2019-02-19 12:55:35 |
| R73.htm | 30291 | 2019-02-19 12:55:35 |
| R74.htm | 29749 | 2019-02-19 12:55:35 |
| R75.htm | 27251 | 2019-02-19 12:55:35 |
| R76.htm | 8364 | 2019-02-19 12:55:35 |
| R77.htm | 13912 | 2019-02-19 12:55:35 |
| R78.htm | 18488 | 2019-02-19 12:55:35 |
| R79.htm | 33757 | 2019-02-19 12:55:35 |
| R8.htm | 77247 | 2019-02-19 12:55:35 |
| R80.htm | 42097 | 2019-02-19 12:55:35 |
| R81.htm | 22103 | 2019-02-19 12:55:35 |
| R82.htm | 7728 | 2019-02-19 12:55:35 |
| R83.htm | 12646 | 2019-02-19 12:55:35 |
| R84.htm | 103837 | 2019-02-19 12:55:35 |
| R85.htm | 18757 | 2019-02-19 12:55:35 |
| R86.htm | 37177 | 2019-02-19 12:55:35 |
| R87.htm | 10718 | 2019-02-19 12:55:35 |
| R88.htm | 48041 | 2019-02-19 12:55:35 |
| R89.htm | 12083 | 2019-02-19 12:55:35 |
| R9.htm | 194094 | 2019-02-19 12:55:35 |
| report.css | 2768 | 2019-02-19 12:55:35 |
 salesvolsandprove.jpg | 63570 | 2019-02-19 12:55:35 |
| Show.js | 1086 | 2019-02-19 12:55:35 |
 usonshore.jpg | 64822 | 2019-02-19 12:55:35 |
 westafricamapa02.jpg | 48119 | 2019-02-19 12:55:35 |
 worldmap2018.jpg | 94932 | 2019-02-19 12:55:35 |
 ytd2018commodityprices.jpg | 42597 | 2019-02-19 12:55:35 |