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Properties and Equipment, Net (Tables)
 3 Months Ended
Mar. 31, 2022
Property, Plant and Equipment [Abstract]  
Schedule of properties and equipment, net Properties and equipment, net are comprised of the following:
(In millions)March 31,
2022		December 31,
2021
Proved oil and gas properties$15,653 $15,340 
Unproved oil and gas properties 5,317 5,316 
Pipelines and gathering402 395 
Land, buildings and other equipment 140 140 
Finance lease right-of-use asset24 20 
21,536 21,211 
Accumulated depreciation, depletion and amortization(4,190)(3,836)
 $17,346 $17,375