Acquisitions and Divestitures - Narrative (Details) a in Thousands, shares in Millions, $ in Millions		1 Months Ended			3 Months Ended
	Mar. 25, 2019 USD ($)	Feb. 28, 2019 USD ($) a MMBbls	Mar. 31, 2018 USD ($) shares	Jan. 31, 2018 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2021	Dec. 31, 2018 USD ($)	Feb. 28, 2018 USD ($)	Feb. 01, 2018 shares
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration					$ 559			$ 286
Proceeds from issuance of preferred equity					99	$ 0
Asset Impairments					0	168
Cash consideration					0	(650)
Gain (loss) on divestiture					0	588
Proceeds from divestiture					123	865
Intangible assets					302			310
Goodwill					$ 110			$ 110
CONE Gathering LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on divestiture				$ 196
Ownership				50.00%						33.50%
Proceeds from divestiture				$ 308
Noble Midstream
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity commitment	$ 200
Proceeds from issuance of preferred equity	100
Remaining commitment amount	$ 100
Annual dividend rate					6.50%
Noble Midstream | Saddle Butte
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration				$ 681
Property, plant and equipment			$ 206			206
Intangible assets			340			340
Goodwill			$ 110			$ 110
EPIC Y-Grade, LP | Noble Midstream
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Step acquisition, percentage acquired					15.00%
Cash consideration					$ 227
EPIC Crude Holdings, LP | Noble Midstream
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Step acquisition, percentage acquired	30.00%				30.00%
Delaware Crossing JV | Noble Midstream
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration					$ 38
Pipeline capacity (in MBbl/d) | MMBbls		160
Tamar and Dalit Fields
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest			32.50%			32.50%
CNX Midstream Partners
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity owned (units) | shares										21.7
Saddle Butte | Noble Midstream
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest				54.40%
Disposed by sale | Reeves County Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proved and unproved non-core acreage sold (in acres) | a		13
Proceeds from divestitures		$ 131
Disposed by sale | Other US Onshore Properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestitures					$ 8	$ 10
Gain (loss) on divestiture						6
Disposed by sale | Gulf of Mexico Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total transaction value			$ 480			480			$ 480
Retained transaction related obligations			$ 92			92
Asset Impairments						$ 168
Disposed by sale | Tamar and Dalit Fields
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage ownership sold			7.50%			7.50%
Cash consideration			$ 487
Shares received in divestiture (in shares) | shares			38.5
Value of shares			$ 224
Gain (loss) on divestiture			386
Tax effect			$ 90
Disposed by sale | Southwest Royalties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale				$ 60
Scenario, Forecast | Tamar and Dalit Fields
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest							25.00%