BUSINESS SEGMENT INFORMATION

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

BUSINESS SEGMENT INFORMATION

BUSINESS SEGMENT INFORMATION

As of December 31, 2020, Apache is engaged in exploration and production (Upstream) activities across three operating segments: Egypt, North Sea, and the U.S. Apache also has active exploration and planned appraisal operations ongoing in Suriname, as well as interests in other international locations that may, over time, result in reportable discoveries and development opportunities. Apache’s Upstream business explores for, develops, and produces natural gas, crude oil and natural gas liquids. During 2018, Apache established a new reporting segment for its U.S. midstream business separate from its upstream oil and gas development activities. The midstream business is operated by Altus, which owns, develops, and operates a midstream energy asset network in the Permian Basin of West Texas. Financial information for each segment is presented below:

	Egypt(1)		North Sea		U.S.		Altus Midstream		Intersegment Eliminations & Other		Total(2)
	Upstream
	(In millions)
2020
Oil revenues	$	1,102	$	795	$	1,209	$	—	$	—	$	3,106
Natural gas revenues	280		67		251		—		—		598
Natural gas liquids revenues	8		21		304		—		—		333
Oil, natural gas, and natural gas liquids production revenues	1,390		883		1,764		—		—		4,037
Purchased oil and gas sales	—		—		394		4		—		398
Midstream service affiliate revenues	—		—		—		145		(145)		—
	1,390		883		2,158		149		(145)		4,435
Operating Expenses:
Lease operating expenses	424		305		400		—		(2)		1,127
Gathering, processing, and transmission	38		50		291		38		(143)		274
Purchased oil and gas costs	—		—		354		3		—		357
Taxes other than income	—		—		108		15		—		123
Exploration	63		28		168		—		15		274
Depreciation, depletion, and amortization	601		380		779		12		—		1,772
Asset retirement obligation accretion	—		73		32		4		—		109
Impairments	529		7		3,963		2		—		4,501
	1,655		843		6,095		74		(130)		8,537
Operating Income (Loss)	$	(265)	$	40	$	(3,937)	$	75	$	(15)	(4,102)
Other Income (Expense):
Gain on divestitures, net											32
Derivative instrument losses, net											(223)
Other											64
General and administrative											(290)
Transaction, reorganization, and separation											(54)
Financing costs, net											(267)
Loss Before Income Taxes											$	(4,840)
Total Assets(3)	$	3,003	$	2,220	$	5,540	$	1,786	$	197	$	12,746
Net Property and Equipment	$	1,955	$	1,773	$	4,760	$	196	$	135	$	8,819
Additions to Net Property and Equipment	$	454	$	215	$	345	$	12	$	136	$	1,162

	Egypt(1)		North Sea		U.S.		Altus Midstream		Intersegment Eliminations & Other		Total(2)
	Upstream
	(In millions)
2019
Oil revenues	$	1,969	$	1,163	$	2,098	$	—	$	—	$	5,230
Natural gas revenues	295		90		293		—		—		678
Natural gas liquids revenues	12		23		372		—		—		407
Oil, natural gas, and natural gas liquids production revenues	2,276		1,276		2,763		—		—		6,315
Purchased oil and gas sales	—		—		176		—		—		176
Midstream service affiliate revenues	—		—		—		136		(136)		—
	2,276		1,276		2,939		136		(136)		6,491
Operating Expenses:
Lease operating expenses	484		320		645		—		(2)		1,447
Gathering, processing, and transmission	40		45		299		56		(134)		306
Purchased oil and gas costs	—		—		142		—		—		142
Taxes other than income	—		—		194		13		—		207
Exploration	100		2		688		—		15		805
Depreciation, depletion, and amortization	708		366		1,566		40		—		2,680
Asset retirement obligation accretion	—		76		29		2		—		107
Impairments	—		—		1,648		1,301		—		2,949
	1,332		809		5,211		1,412		(121)		8,643
Operating Income (Loss)	$	944	$	467	$	(2,272)	$	(1,276)	$	(15)	(2,152)
Other Income (Expense):
Gain on divestitures, net											43
Derivative instrument losses, net											(35)
Other											54
General and administrative											(406)
Transaction, reorganization, and separation											(50)
Financing costs, net											(462)
Loss Before Income Taxes											$	(3,008)
Total Assets(3)	$	3,700	$	2,473	$	10,388	$	1,479	$	67	$	18,107
Net Property and Equipment	$	2,573	$	1,956	$	9,385	$	206	$	38	$	14,158
Additions to Net Property and Equipment	$	454	$	183	$	1,696	$	308	$	93	$	2,734

	Egypt(1)		North Sea		U.S.		Altus Midstream		Intersegment Eliminations & Other		Total(2)
	Upstream
	(In millions)
2018
Oil revenues	$	2,396	$	1,179	$	2,271	$	—	$	—	$	5,846
Natural gas revenues	339		122		458		—		—		919
Natural gas liquids revenues	13		20		550		—		—		583
Oil, natural gas, and natural gas liquids production revenues	2,748		1,321		3,279		—		—		7,348
Purchased oil and gas sales	—		—		357		—		—		357
Midstream service affiliate revenues	—		—		—		77		(77)		—
	2,748		1,321		3,636		77		(77)		7,705
Operating Expenses:
Lease operating expenses	428		341		670		—		—		1,439
Gathering, processing, and transmission	47		42		282		54		(77)		348
Purchased oil and gas costs	—		—		340		—		—		340
Taxes other than income	—		—		207		8		—		215
Exploration	88		192		219		—		4		503
Depreciation, depletion, and amortization	745		375		1,266		19		—		2,405
Asset retirement obligation accretion	—		75		32		1		—		108
Impairments	63		10		438		—		—		511
	1,371		1,035		3,454		82		(73)		5,869
Operating Income (Loss)	$	1,377	$	286	$	182	$	(5)	$	(4)	1,836
Other Income (Expense):
Gain on divestitures, net											23
Derivative instrument losses, net											(17)
Other											53
General and administrative											(431)
Transaction, reorganization, and separation											(28)
Financing costs, net											(478)
Income Before Income Taxes											$	958
Total Assets(3)	$	4,260	$	2,456	$	12,962	$	1,857	$	47	$	21,582
Net Property and Equipment	$	2,856	$	2,148	$	12,145	$	1,227	$	45	$	18,421
Additions to Net Property and Equipment	$	594	$	223	$	2,544	$	545	$	8	$	3,914

(1)Includes revenue from non-customers for the years ended December 31, 2020, 2019, and 2018 of:

	For the Year Ended December 31,
	2020		2019		2018
	(In millions)
Oil	$	95	$	410	$	592
Natural gas	14		40		58
Natural gas liquids	—		1		2

(2)Includes a noncontrolling interest in Egypt and Altus Midstream.

(3)Intercompany balances are excluded from total assets.