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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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