STATEMENT OF CONSOLIDATED CHANGES IN EQUITY - USD ($) $ in Millions	Total	Common Stock	Paid-In Capital	Retained Earnings (Accumulated Deficit)	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	APACHE SHAREHOLDERS’ EQUITY	Noncontrolling Interest	Noncontrolling Interest, Egypt	Noncontrolling Interest, Altus
Beginning Balance at Dec. 31, 2015	$ 9,490	$ 257	$ 12,619	$ (1,980)	$ (2,889)	$ (119)	$ 7,888	$ 1,602
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(1,273)			(1,405)			(1,405)	132
Net income attributable to common stock	(1,405)
Net income attributable to noncontrolling interest									$ 132	$ 0
Distributions to noncontrolling interest	(293)							(293)
Pension & Postretirement benefit plans, net of tax	7					7	7
Common dividends ($1.00 per share)	(379)		(379)				(379)
Common stock activity, net	(38)	1	(39)				(38)
Treasury stock activity, net	1		(1)		2		1
Compensation expense	164		164				164
Ending Balance at Dec. 31, 2016	7,679	258	12,364	(3,385)	(2,887)	(112)	6,238	1,441
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,503			1,304			1,304	199
Net income attributable to common stock	1,304
Net income attributable to noncontrolling interest									199	0
Distributions to noncontrolling interest	(265)							(265)
Pension & Postretirement benefit plans, net of tax	7					7	7
Common dividends ($1.00 per share)	(381)		(381)				(381)
Common stock activity, net	(39)	1	(40)				(39)
Compensation expense	174		174				174
Other	113		11	(7)		109	113
Ending Balance at Dec. 31, 2017	8,791	259	12,128	(2,088)	(2,887)	4	7,416	1,375
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	286
Net income attributable to common stock	40			40			40
Net income attributable to noncontrolling interest									$ 245	$ 1
Distributions to noncontrolling interest	(345)							(345)
Pension & Postretirement benefit plans, net of tax	0
Common dividends ($1.00 per share)	(380)		(380)				(380)
Common stock activity, net	(28)	1	(29)				(28)
Treasury stock activity, net	(305)				(305)		(305)
Proceeds from Altus transaction	628		222				222	406
Compensation expense	160		160				160
Other	5		5				5
Ending Balance at Dec. 31, 2018	$ 8,812	$ 260	$ 12,106	$ (2,048)	$ (3,192)	$ 4	$ 7,130	$ 1,682