STATEMENT OF CONSOLIDATED OPERATIONS (Unaudited) - USD ($)		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
REVENUES AND OTHER:
Oil and gas production revenues		$ 0
Derivative instrument gains (losses), net		158,000,000	$ (103,000,000)
Gain on divestitures, net		2,000,000	25,000,000
Other, net		61,000,000	13,000,000
Total revenues and other		2,092,000,000	1,279,000,000
OPERATING EXPENSES:
Lease operating expenses		264,000,000	335,000,000
Taxes other than income		44,000,000	33,000,000
Exploration		46,000,000	57,000,000
General and administrative		83,000,000	68,000,000
Transaction, reorganization, and separation		0	27,000,000
Depreciation, depletion, and amortization		342,000,000	566,000,000
Asset retirement obligation accretion		28,000,000	27,000,000
Impairments		0	4,472,000,000
Financing costs, net	[1]	107,000,000	103,000,000
Total operating expenses		1,466,000,000	5,845,000,000
NET INCOME (LOSS) BEFORE INCOME TAXES		626,000,000	(4,566,000,000)
Current income tax provision		149,000,000	89,000,000
Deferred income tax provision (benefit)		18,000,000	(33,000,000)
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTERESTS		459,000,000	(4,622,000,000)
NET INCOME (LOSS) ATTRIBUTABLE TO APA CORPORATION		397,000,000	(4,480,000,000)
Altus Preferred Unit limited partners
OPERATING EXPENSES:
Net income (loss) attributable to noncontrolling interest		19,000,000	18,000,000
Noncontrolling interests, Egypt
OPERATING EXPENSES:
Net income (loss) attributable to noncontrolling interest		42,000,000	(151,000,000)
Noncontrolling interests, Altus
OPERATING EXPENSES:
Net income (loss) attributable to noncontrolling interest		1,000,000	(9,000,000)
Oil and gas
REVENUES AND OTHER:
Oil and gas production revenues		1,871,000,000	1,344,000,000
Oil and gas, excluding purchased
REVENUES AND OTHER:
Oil and gas production revenues		1,431,000,000	1,236,000,000
OPERATING EXPENSES:
Cost of oil and gas purchased		58,000,000	71,000,000
Oil and gas, purchased
REVENUES AND OTHER:
Oil and gas production revenues		440,000,000	108,000,000
OPERATING EXPENSES:
Cost of oil and gas purchased		$ 494,000,000	$ 86,000,000

[1] Includes amounts of $5 million associated with APA Corporation for the first quarter of 2021. Refer to Note 2—Transactions with Parent Affiliate.