Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Components of Property, Plant and Equipment

Property, plant and equipment at December 31 were as follows:

	2021		2020
	(In millions)
Exploration and Production
Unproved properties	$	184	$	164
Proved properties	2,877		2,930
Wells, equipment and related facilities	23,745		23,224
	26,806		26,318
Midstream	4,342		4,163
Corporate and Other	30		38
Total — at cost	31,178		30,519
Less: Reserves for depreciation, depletion, amortization and lease impairment	16,996		16,404
Property, Plant and Equipment — Net	$	14,182	$	14,115

Net Changes in Capitalized Exploratory Well Costs

Capitalized Exploratory Well Costs:  The following table discloses the amount of capitalized exploratory well costs pending determination of proved reserves at December 31 and the changes therein during the respective years:

	2021		2020		2019
	(In millions)
Balance at January 1	$	459	$	584	$	418
Additions to capitalized exploratory well costs pending the determination of proved reserves	222		111		224
Reclassifications to wells, facilities and equipment based on the determination of proved reserves	—		(111)		(58)
Capitalized exploratory well costs charged to expense	—		(125)		—
Balance at December 31	$	681	$	459	$	584
Number of Wells at December 31	35		22		31

Exploratory Drilling Costs Capitalized

Exploratory well costs capitalized for greater than one year following completion of drilling were $459 million at December 31, 2021, separated by year of completion as follows (in millions):

2020	$	117
2019	173
2018	105
2017	27
2016 and prior	37
	$	459