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Acquisitions and Dispositions - Schedule of Non-Recurring Restructuring and Transition-Related Costs (Details) - Concho Resources Incorporated - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2021
Business Acquisition [Line Items]
Transaction Cost	$ 157	$ 157
Restructuring Cost		234
Total Cost		391
Production and operating expenses
Business Acquisition [Line Items]
Transaction Cost
Restructuring Cost		128
Total Cost		128
Selling, general and administration expenses
Business Acquisition [Line Items]
Transaction Cost		135
Restructuring Cost		67
Total Cost		202
Exploration expenses
Business Acquisition [Line Items]
Transaction Cost		18
Restructuring Cost		8
Total Cost		26
Taxes other than income taxes
Business Acquisition [Line Items]
Transaction Cost		4
Restructuring Cost		2
Total Cost		6
Other expenses
Business Acquisition [Line Items]
Transaction Cost		0
Restructuring Cost		29
Total Cost		$ 29

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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