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) | Previously Reported [Member]	(15,846)
Net income (loss)	(6,239)	[1],[2]			(6,337)			(6,337)	98
Distributions to noncontrolling interest	(97)								(97)
Common dividends	(283)				(283)			(283)
Other	61		1	59		1		61
Ending Balance at Sep. 30, 2015	13,983		257	12,649	2,035	(2,889)	(116)	11,936	2,047
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	[3]	257	12,619	(1,980)	(2,889)	(119)	7,888	1,602
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) | Previously Reported [Member]	(1,531)
Net income (loss)	(1,130)				(1,223)			(1,223)	93
Distributions to noncontrolling interest	(215)								(215)
Common dividends	(284)			(284)				(284)
Other	88		1	86		1		88
Ending Balance (Previously Reported [Member]) at Sep. 30, 2016	2,296
Ending Balance at Sep. 30, 2016	$ 7,949		$ 258	$ 12,421	$ (3,203)	$ (2,888)	$ (119)	$ 6,469	$ 1,480

[1] Financial information for 2015 has been recast to reflect retrospective application of the successful efforts method of accounting. See Note 1.

[2] Financial information for 2015 has been recast to reflect retrospective application of the successful efforts method of accounting. See Note 1.

[3] Financial information for 2015 has been recast to reflect retrospective application of the successful efforts method of accounting. See Note 1.