STATEMENT OF CONSOLIDATED CASH FLOWS (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss) including noncontrolling interests	$ 890,000,000	$ (5,000,000,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Unrealized derivative instrument losses, net	55,000,000	241,000,000
Gain on divestitures, net	(67,000,000)	(25,000,000)
Exploratory dry hole expense and unproved leasehold impairments	46,000,000	97,000,000
Depreciation, depletion, and amortization	693,000,000	984,000,000
Asset retirement obligation accretion	56,000,000	54,000,000
Impairments	0	4,492,000,000
Deferred income tax benefit	(22,000,000)	(44,000,000)
Gain on extinguishment of debt	(1,000,000)	(140,000,000)
Other, net	(34,000,000)	14,000,000
Changes in operating assets and liabilities:
Receivables	(173,000,000)	183,000,000
Inventories	20,000,000	25,000,000
Drilling advances and other current assets	32,000,000	(26,000,000)
Deferred charges and other long-term assets	(18,000,000)	(16,000,000)
Accounts payable	145,000,000	(147,000,000)
Accounts payable to APA Corporation	13,000,000	0
Accrued expenses	17,000,000	(148,000,000)
Deferred credits and noncurrent liabilities	(17,000,000)	42,000,000
NET CASH PROVIDED BY OPERATING ACTIVITIES	1,635,000,000	586,000,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to upstream oil and gas property	(488,000,000)	(838,000,000)
Additions to Altus gathering, processing, and transmission (GPT) facilities	(1,000,000)	(25,000,000)
Leasehold and property acquisitions	(3,000,000)	(3,000,000)
Contributions to Altus equity method interests	(24,000,000)	(154,000,000)
Proceeds from sale of oil and gas properties	181,000,000	126,000,000
Other, net	12,000,000	(23,000,000)
NET CASH USED IN INVESTING ACTIVITIES	(323,000,000)	(917,000,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from (payments on) Apache credit facility, net	(150,000,000)	565,000,000
Proceeds from Altus credit facility, net	33,000,000	97,000,000
Payments on fixed-rate debt	(20,000,000)	(264,000,000)
Distributions to noncontrolling interest - Egypt	(60,000,000)	(40,000,000)
Distributions to Altus Preferred Unit limited partners	(23,000,000)	0
Distributions to APA Corporation	(302,000,000)	0
Dividends paid	(9,000,000)	(104,000,000)
Other, net	(21,000,000)	(35,000,000)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	(552,000,000)	219,000,000
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	760,000,000	(112,000,000)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	262,000,000	247,000,000
CASH AND CASH EQUIVALENTS AT END OF PERIOD	1,022,000,000	135,000,000
SUPPLEMENTARY CASH FLOW DATA:
Interest paid, net of capitalized interest	233,000,000	212,000,000
Income taxes paid, net of refunds	$ 231,000,000	$ 80,000,000