| **Segment Information - Operating Results by Segment (Details) - USD ($) $ in Millions** | 12 Months Ended |
|------------------------------------------------------------------------------------------|-----------------|
||
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | $ 4,986         | $ 4,256 | $ 3,491 |
| Lease Operating Expense                                                                  | 576             | 571 | 542 |
| Production and Ad Valorem Taxes                                                          | 190             | 118 | 57 |
| Gathering, Transportation and Processing Expense                                         | 393             | 432 | 480 |
| Total                                                                                    | 1,197           | 1,141 | 1,100 |
| Exploration Expense                                                                      | 129             | 188 | 925 |
| DD&A                                                                                 | 1,934           | 2,053 | 2,454 |
| (Gain) Loss on Divestitures, Net                                                         | 206             |   |   |
| Goodwill Impairment                                                                      | 1,281           | 0 | 0 |
| Asset Impairments                                                                        | (843)           | (326) | (238) |
| Gain on Asset Retirement Obligation Revisions                                            | (25)            | (42) |   |
| Gain on Divestitures, Net                                                                | 0               | 100 | 0 |
| Asset Impairments                                                                        | 8               | 98 | (80) |
| Loss on Marcellus Shale Upstream Divestiture and Other                                   | 0               | 2,379 | 0 |
| Asset Impairments                                                                        | 206             | 70 | 92 |
| (Gain) Loss on Commodity Derivative Instruments                                          | (63)            | (63) | 139 |
| Income (Loss) Before Income Taxes                                                        | 140             | (2,191) | (1,772) |
| Additions to Long-Lived Assets                                                           | 3,253           | 2,851 | 1,526 |
| Property, Plant and Equipment, Net                                                       | 18,419          | 17,502 | 18,548 |
| Intersegment Eliminations and Other                                                      |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | (351)           | (277) | (200) |
| Lease Operating Expense                                                                  | (27)            | (14) | (18) |
| Production and Ad Valorem Taxes                                                          | 0               | 0 | 0 |
| Gathering, Transportation and Processing Expense                                         | (235)           | (188) | (128) |
| Total                                                                                    | (262)           | (202) | (146) |
| Exploration Expense                                                                      | 0               | 0 | 0 |
| DD&A                                                                                 | (20)            | (5) | 0 |
| (Gain) Loss on Divestitures, Net                                                         | 0               |   |   |
| Goodwill Impairment                                                                      | 0               |   |   |
| Asset Impairments                                                                        | 0               | 0 | 0 |
| Gain on Asset Retirement Obligation Revisions                                            | 0               | 0 |   |
| Gain on Divestitures, Net                                                                |            | 0 |   |
| Asset Impairments                                                                        |            | 0 |   |
| Loss on Marcellus Shale Upstream Divestiture and Other                                   |            | 0 |   |
| Asset Impairments                                                                        |            | 0 | 0 |
| (Gain) Loss on Commodity Derivative Instruments                                          | 0               | 0 | 0 |
| Income (Loss) Before Income Taxes                                                        | (60)            | (62) | (51) |
| Additions to Long-Lived Assets                                                           | (91)            | (79) | (53) |
| Property, Plant and Equipment, Net                                                       | (145)           | (74) | 0 |
| Corporate                                                                                |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 113             | 0 | 0 |
| Lease Operating Expense                                                                  | 0               | 0 | 0 |
| Production and Ad Valorem Taxes                                                          | 0               | 0 | 0 |
| Gathering, Transportation and Processing Expense                                         | 0               | 0 | 0 |
| Total                                                                                    | 0               | 0 | 0 |
| Exploration Expense                                                                      | 0               | 0 | 0 |
| DD&A                                                                                 | 48              | 63 | 40 |
| (Gain) Loss on Divestitures, Net                                                         | 0               |   |   |
| Goodwill Impairment                                                                      | 0               |   |   |
| Asset Impairments                                                                        | 0               | 0 | 0 |
| Gain on Asset Retirement Obligation Revisions                                            | 0               | 0 |   |
| Gain on Divestitures, Net                                                                |            | 0 |   |
| Asset Impairments                                                                        |            | 98 |   |
| Loss on Marcellus Shale Upstream Divestiture and Other                                   |            | 93 |   |
| Asset Impairments                                                                        |            | 0 | 0 |
| (Gain) Loss on Commodity Derivative Instruments                                          | 0               | 0 | 0 |
| Income (Loss) Before Income Taxes                                                        | (645)           | (559) | (626) |
| Additions to Long-Lived Assets                                                           | 25              | 102 | 32 |
| Property, Plant and Equipment, Net                                                       | 306             | 308 | 332 |
| United States | Operating Segments                                                       |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 3,590           | 3,156 | 2,416 |
| Lease Operating Expense                                                                  | 480             | 466 | 418 |
| Production and Ad Valorem Taxes                                                          | 184             | 115 | 55 |
| Gathering, Transportation and Processing Expense                                         | 533             | 550 | 564 |
| Total                                                                                    | 1,235           | 1,151 | 1,058 |
| Exploration Expense                                                                      | 48              | 102 | 245 |
| DD&A                                                                                 | 1,642           | 1,739 | 2,103 |
| (Gain) Loss on Divestitures, Net                                                         | 169             |   |   |
| Goodwill Impairment                                                                      | 1,281           |   |   |
| Asset Impairments                                                                        | 36              | (325) | 23 |
| Gain on Asset Retirement Obligation Revisions                                            | 0               | 0 |   |
| Gain on Divestitures, Net                                                                |            | 100 |   |
| Asset Impairments                                                                        |            | 0 |   |
| Loss on Marcellus Shale Upstream Divestiture and Other                                   |            | 2,286 |   |
| Asset Impairments                                                                        |            | 63 | 0 |
| (Gain) Loss on Commodity Derivative Instruments                                          | (70)            | (92) | 126 |
| Income (Loss) Before Income Taxes                                                        | (875)           | (2,365) | (1,277) |
| Additions to Long-Lived Assets                                                           | 2,115           | 1,994 | 1,353 |
| Property, Plant and Equipment, Net                                                       | 13,044          | 13,348 | 14,755 |
| United States | Noble Midstream                                                          |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 611             | 353 | 252 |
| Lease Operating Expense                                                                  | 0               | 0 | 0 |
| Production and Ad Valorem Taxes                                                          | 6               | 3 | 2 |
| Gathering, Transportation and Processing Expense                                         | 95              | 70 | 44 |
| Total                                                                                    | 101             | 73 | 46 |
| Exploration Expense                                                                      | 0               | 0 | 0 |
| DD&A                                                                                 | 87              | 30 | 19 |
| (Gain) Loss on Divestitures, Net                                                         | 37              |   |   |
| Goodwill Impairment                                                                      | 0               |   |   |
| Asset Impairments                                                                        | (503)           | 0 | 0 |
| Gain on Asset Retirement Obligation Revisions                                            | 0               | 0 |   |
| Gain on Divestitures, Net                                                                |            | 0 |   |
| Asset Impairments                                                                        |            | 0 |   |
| Loss on Marcellus Shale Upstream Divestiture and Other                                   |            | 0 |   |
| Asset Impairments                                                                        |            | 0 | 0 |
| (Gain) Loss on Commodity Derivative Instruments                                          | 0               | 0 | 0 |
| Income (Loss) Before Income Taxes                                                        | 726             | 233 | 176 |
| Additions to Long-Lived Assets                                                           | 521             | 423 | 58 |
| Property, Plant and Equipment, Net                                                       | 1,742           | 1,027 | 594 |
| United States | Intersegment Eliminations and Other                                      |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 351             | 277 | 200 |
| Eastern Mediterranean | Operating Segments                                               |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 480             | 534 | 540 |
| Lease Operating Expense                                                                  | 26              | 29 | 37 |
| Production and Ad Valorem Taxes                                                          | 0               | 0 | 0 |
| Gathering, Transportation and Processing Expense                                         | 0               | 0 | 0 |
| Total                                                                                    | 26              | 29 | 37 |
| Exploration Expense                                                                      | 7               | 2 | 34 |
| DD&A                                                                                 | 60              | 76 | 81 |
| (Gain) Loss on Divestitures, Net                                                         | 0               |   |   |
| Goodwill Impairment                                                                      | 0               |   |   |
| Asset Impairments                                                                        | (376)           | (1) | (261) |
| Gain on Asset Retirement Obligation Revisions                                            | (8)             | 0 |   |
| Gain on Divestitures, Net                                                                |            | 0 |   |
| Asset Impairments                                                                        |            | 0 |   |
| Loss on Marcellus Shale Upstream Divestiture and Other                                   |            | 0 |   |
| Asset Impairments                                                                        |            | 0 | 88 |
| (Gain) Loss on Commodity Derivative Instruments                                          | 0               | 0 | 0 |
| Income (Loss) Before Income Taxes                                                        | 742             | 413 | 543 |
| Additions to Long-Lived Assets                                                           | 671             | 411 | 88 |
| Property, Plant and Equipment, Net                                                       | 2,630           | 2,005 | 1,872 |
| West Africa | Operating Segments                                                         |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 543             | 490 | 483 |
| Lease Operating Expense                                                                  | 97              | 90 | 105 |
| Production and Ad Valorem Taxes                                                          | 0               | 0 | 0 |
| Gathering, Transportation and Processing Expense                                         | 0               | 0 | 0 |
| Total                                                                                    | 97              | 90 | 105 |
| Exploration Expense                                                                      | 6               | 5 | 483 |
| DD&A                                                                                 | 115             | 146 | 205 |
| (Gain) Loss on Divestitures, Net                                                         | 0               |   |   |
| Goodwill Impairment                                                                      | 0               |   |   |
| Asset Impairments                                                                        | 0               | 0 | 0 |
| Gain on Asset Retirement Obligation Revisions                                            | 0               | 0 |   |
| Gain on Divestitures, Net                                                                |            | 0 |   |
| Asset Impairments                                                                        |            | 0 |   |
| Loss on Marcellus Shale Upstream Divestiture and Other                                   |            | 0 |   |
| Asset Impairments                                                                        |            | 0 | 0 |
| (Gain) Loss on Commodity Derivative Instruments                                          | 7               | 29 | 13 |
| Income (Loss) Before Income Taxes                                                        | 305             | 203 | (338) |
| Additions to Long-Lived Assets                                                           | 12              | 34 | 54 |
| Property, Plant and Equipment, Net                                                       | 805             | 863 | 980 |
| Other Int'l | Operating Segments                                                         |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Lease Operating Expense                                                                  | 0               | 0 | 0 |
| Production and Ad Valorem Taxes                                                          | 0               | 0 | 0 |
| Gathering, Transportation and Processing Expense                                         | 0               | 0 | 0 |
| Total                                                                                    | 0               | 0 | 0 |
| Exploration Expense                                                                      | 68              | 79 | 163 |
| DD&A                                                                                 | 2               | 4 | 6 |
| (Gain) Loss on Divestitures, Net                                                         | 0               |   |   |
| Goodwill Impairment                                                                      | 0               |   |   |
| Asset Impairments                                                                        | 0               | 0 | 0 |
| Gain on Asset Retirement Obligation Revisions                                            | (17)            | (42) |   |
| Gain on Divestitures, Net                                                                |            | 0 |   |
| Asset Impairments                                                                        |            | 0 |   |
| Loss on Marcellus Shale Upstream Divestiture and Other                                   |            | 0 |   |
| Asset Impairments                                                                        |            | 7 | 4 |
| (Gain) Loss on Commodity Derivative Instruments                                          | 0               | 0 | 0 |
| Income (Loss) Before Income Taxes                                                        | (53)            | (54) | (199) |
| Additions to Long-Lived Assets                                                           | 0               | (34) | (6) |
| Property, Plant and Equipment, Net                                                       | 37              | 25 | 15 |
| Oil, NGL and Gas Sales                                                                   |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 4,461           | 4,060 | 3,389 |
| Oil, NGL and Gas Sales | Intersegment Eliminations and Other                             |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Oil, NGL and Gas Sales | Corporate                                                       |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Oil, NGL and Gas Sales | United States | Operating Segments                              |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 3,570           | 3,156 | 2,416 |
| Oil, NGL and Gas Sales | United States | Noble Midstream                                 |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Oil, NGL and Gas Sales | Eastern Mediterranean | Operating Segments                      |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 480             | 534 | 540 |
| Oil, NGL and Gas Sales | West Africa | Operating Segments                                |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 411             | 370 | 433 |
| Oil, NGL and Gas Sales | Other Int'l | Operating Segments                                |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Crude Oil Sales                                                                          |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 2,945           | 2,346 | 1,854 |
| Crude Oil Sales | Intersegment Eliminations and Other                                    |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Crude Oil Sales | Corporate                                                              |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Crude Oil Sales | United States | Operating Segments                                     |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 2,548           | 1,993 | 1,439 |
| Crude Oil Sales | United States | Noble Midstream                                        |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Crude Oil Sales | Eastern Mediterranean | Operating Segments                             |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 7               | 6 | 5 |
| Crude Oil Sales | West Africa | Operating Segments                                       |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 390             | 347 | 410 |
| Crude Oil Sales | Other Int'l | Operating Segments                                       |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| NGL Sales                                                                                |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 587             | 493 | 296 |
| NGL Sales | Intersegment Eliminations and Other                                          |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| NGL Sales | Corporate                                                                    |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| NGL Sales | United States | Operating Segments                                           |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 587             | 493 | 296 |
| NGL Sales | United States | Noble Midstream                                              |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| NGL Sales | Eastern Mediterranean | Operating Segments                                   |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| NGL Sales | West Africa | Operating Segments                                             |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| NGL Sales | Other Int'l | Operating Segments                                             |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Natural Gas Sales                                                                        |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 929             | 1,221 | 1,239 |
| Natural Gas Sales | Intersegment Eliminations and Other                                  |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Natural Gas Sales | Corporate                                                            |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Natural Gas Sales | United States | Operating Segments                                   |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 435             | 670 | 681 |
| Natural Gas Sales | United States | Noble Midstream                                      |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Natural Gas Sales | Eastern Mediterranean | Operating Segments                           |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 473             | 528 | 535 |
| Natural Gas Sales | West Africa | Operating Segments                                     |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 21              | 23 | 23 |
| Natural Gas Sales | Other Int'l | Operating Segments                                     |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Purchased Oil and Gas                                                                    |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 275             | 0 | 0 |
| Cost of Goods and Services Sold                                                          | 296             |   |   |
| Purchased Oil and Gas | Intersegment Eliminations and Other                              |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               |   |   |
| Cost of Goods and Services Sold                                                          | 0               |   |   |
| Purchased Oil and Gas | Corporate                                                        |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 113             |   |   |
| Cost of Goods and Services Sold                                                          | 140             |   |   |
| Purchased Oil and Gas | United States | Operating Segments                               |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 20              |   |   |
| Cost of Goods and Services Sold                                                          | 20              |   |   |
| Purchased Oil and Gas | United States | Noble Midstream                                  |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 142             |   |   |
| Cost of Goods and Services Sold                                                          | 136             |   |   |
| Purchased Oil and Gas | Eastern Mediterranean | Operating Segments                       |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               |   |   |
| Cost of Goods and Services Sold                                                          | 0               |   |   |
| Purchased Oil and Gas | West Africa | Operating Segments                                 |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               |   |   |
| Cost of Goods and Services Sold                                                          | 0               |   |   |
| Purchased Oil and Gas | Other Int'l | Operating Segments                                 |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               |   |   |
| Cost of Goods and Services Sold                                                          | 0               |   |   |
| Income from Equity Method Investees                                                      |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 172             | 177 | 102 |
| Income from Equity Method Investees | Intersegment Eliminations and Other                |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Income from Equity Method Investees | Corporate                                          |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Income from Equity Method Investees | United States | Operating Segments                 |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Income from Equity Method Investees | United States | Noble Midstream                    |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 40              | 57 | 52 |
| Income from Equity Method Investees | Eastern Mediterranean | Operating Segments         |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Income from Equity Method Investees | West Africa | Operating Segments                   |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 132             | 120 | 50 |
| Income from Equity Method Investees | Other Int'l | Operating Segments                   |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 | 0 |
| Midstream Services Revenues - Third Party                                                |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 78              | 19 | 0 |
| Midstream Services Revenues - Third Party | Intersegment Eliminations and Other          |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 |   |
| Midstream Services Revenues - Third Party | Corporate                                    |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 |   |
| Midstream Services Revenues - Third Party | United States | Operating Segments           |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 |   |
| Midstream Services Revenues - Third Party | United States | Noble Midstream              |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 78              | 19 |   |
| Midstream Services Revenues - Third Party | Eastern Mediterranean | Operating Segments   |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 |   |
| Midstream Services Revenues - Third Party | West Africa | Operating Segments             |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 |   |
| Midstream Services Revenues - Third Party | Other Int'l | Operating Segments             |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Revenue from Sales                                                                       | 0               | 0 |   |
| Other Royalty Expense                                                                    |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Cost of Goods and Services Sold                                                          | 38              | 20 | 21 |
| Other Royalty Expense | Intersegment Eliminations and Other                              |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Cost of Goods and Services Sold                                                          | 0               | 0 | 0 |
| Other Royalty Expense | Corporate                                                        |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Cost of Goods and Services Sold                                                          | 0               | 0 | 0 |
| Other Royalty Expense | United States | Operating Segments                               |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Cost of Goods and Services Sold                                                          | 38              | 20 | 21 |
| Other Royalty Expense | United States | Noble Midstream                                  |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Cost of Goods and Services Sold                                                          | 0               | 0 | 0 |
| Other Royalty Expense | Eastern Mediterranean | Operating Segments                       |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Cost of Goods and Services Sold                                                          | 0               | 0 | 0 |
| Other Royalty Expense | West Africa | Operating Segments                                 |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Cost of Goods and Services Sold                                                          | 0               | 0 | 0 |
| Other Royalty Expense | Other Int'l | Operating Segments                                 |            |   |   |
| **Segment Reporting Information [Line Items]**                                           |            |   |   |
| Cost of Goods and Services Sold                                                          | $ 0             | $ 0 | $ 0 |

| X                                                                                                                                                                                                                                                                                                                   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Gain (Loss) On Revision Of Estimates For Asset Retirement Obligation
+ References
No definition available.
+ Details**Name:**nbl_GainLossOnRevisionOfEstimatesForAssetRetirementObligation**Namespace Prefix:**nbl_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.
+ References
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| - Definition
The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.
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| - Definition
The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.
+ References
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| - Definition
Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.
+ References
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| - Definition
Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.
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| - Definition
Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.
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| - Definition
Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.
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| - Definition
Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.
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| - Definition
The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.
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| - Definition
The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced.
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| - Definition
Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.
+ References
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| - Definition
Amount of operating lease expense. Excludes sublease income.
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| - Definition
A tax assessed on oil and gas production.
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| - Definition
Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.
+ References
No definition available.
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| - Definition
Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.
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| - Definition
Exploration costs from oil and gas producing activities.
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Production (lifting) costs from oil and gas producing activities, including but not limited to lease operating expense, production and ad valorem taxes, and transportation expense.
+ References
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| - Definition
Includes the cost to prepare and move liquid hydrocarbons and natural gas to their points of sale.
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| - Definition
Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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No definition available.
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