Statement of Consolidated Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock [Member]	Paid-In Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Apache Shareholders' Equity [Member]	Non Controlling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of change in accounting principle | Effect of change in accounting principle [Member]	$ (7,596)		$ 152	$ (7,594)			$ (7,442)	$ (154)
Beginning Balance (Previously Reported [Member]) at Dec. 31, 2014	28,137	$ 256	12,438	16,249	$ (2,890)	$ (116)	25,937	2,200
Beginning Balance at Dec. 31, 2014	20,541	256	12,590	8,655	(2,890)	(116)	18,495	2,046
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(2,103)			(2,194)			(2,194)	91
Distributions to noncontrolling interest	(40)							(40)
Common dividends	(189)			(189)			(189)
Other	47	1	45		1		47
Ending Balance at Jun. 30, 2015	18,256	257	12,635	6,272	(2,889)	(116)	16,159	2,097
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of change in accounting principle | Effect of change in accounting principle [Member]	5,262		152	5,173		(3)	5,322	(60)
Beginning Balance (Previously Reported [Member]) at Dec. 31, 2015	4,228	257	12,467	(7,153)	(2,889)	(116)	2,566	1,662
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)	(571)			(616)			(616)	45
Distributions to noncontrolling interest	(93)							(93)
Common dividends	(189)		(189)				(189)
Other	59	1	57		1		59
Ending Balance at Jun. 30, 2016	$ 8,696	$ 258	$ 12,487	$ (2,596)	$ (2,888)	$ (119)	$ 7,142	$ 1,554