STATEMENT OF CONSOLIDATED CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss) including noncontrolling interests	$ 1,402	$ (4,904)	$ (3,682)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Unrealized derivative instrument losses (gains), net	(69)	87	44
Gain on divestitures, net	(67)	(32)	(43)
Exploratory dry hole expense and unproved leasehold impairments	86	211	676
Depreciation, depletion, and amortization	1,360	1,772	2,680
Asset retirement obligation accretion	113	109	107
Impairments	208	4,501	2,949
Provision for (benefit from) deferred income taxes	(74)	(112)	14
Loss (gain) from extinguishment of debt	104	(160)	75
Loss on previously sold Gulf of Mexico properties	446	0	0
Other	(23)	102	50
Changes in operating assets and liabilities:
Receivables	(393)	149	133
Inventories	(9)	19	(41)
Drilling advances and other current assets	60	(29)	30
Deferred charges and other long-term assets	(42)	(13)	0
Accounts payable	205	(167)	(5)
Accounts payable to APA Corporation	40	0	0
Accrued expenses	127	(163)	(84)
Deferred credits and noncurrent liabilities	31	18	(36)
NET CASH PROVIDED BY OPERATING ACTIVITIES	3,505	1,388	2,867
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property	(934)	(1,270)	(2,594)
Additions to Altus gathering, processing, and transmission (GPT) facilities	(3)	(28)	(327)
Leasehold and property acquisitions	(9)	(4)	(40)
Contributions to Altus equity method interests	(28)	(327)	(501)
Acquisition of Altus equity method interests	0	0	(671)
Proceeds from asset divestitures	256	166	718
Other	52	(3)	(31)
NET CASH USED IN INVESTING ACTIVITIES	(666)	(1,466)	(3,446)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Apache credit facility, net	392	150	0
Proceeds from Altus credit facility	33	228	396
Proceeds from note payable to APA Corporation, net	78	0	0
Fixed rate debt borrowings	0	1,238	989
Payments on fixed-rate debt	(1,795)	(1,243)	(1,150)
Distributions to noncontrolling interest - Egypt	(279)	(91)	(305)
Distributions to Altus Preferred Unit limited partners	(46)	(23)	0
Redeemable noncontrolling interest - Altus Preferred Unit limited partners	0	0	611
Distributions to APA Corporation	(1,182)	0	0
Dividends paid	(9)	(123)	(376)
Treasury stock activity, net	0	1	2
Other	(14)	(44)	(55)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	(2,822)	93	112
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	17	15	(467)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	262	247	714
CASH AND CASH EQUIVALENTS AT END OF PERIOD	279	262	247
SUPPLEMENTARY CASH FLOW DATA:
Interest paid, net of capitalized interest	442	419	394
Income taxes paid, net of refunds	$ 633	$ 212	$ 649