Supplemental Guarantor Information - Supplemental Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY CONTINUING OPERATING ACTIVITIES		$ 2,834	$ 7,517	$ 8,685
CASH PROVIDED BY DISCONTINUED OPERATIONS		150	944	1,150
CASH PROVIDED BY OPERATING ACTIVITIES		2,984	8,461	9,835
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property		(4,578)	(9,022)	(8,663)
Additions to gas gathering, transmission, and processing facilities		(233)	(881)	(464)
Proceeds from sale of Deepwater Gulf of Mexico assets		854	1,360
Proceeds from divestiture of Gulf of Mexico Shelf properties		391	1,262	3,702
Leasehold and property acquisitions		(367)	(1,475)	(429)
Proceeds from Kitimat LNG transaction, net				396
Proceeds from sale of oil and gas properties	$ 1,200	268	470	307
Other		6	(299)	(105)
NET CASH USED IN CONTINUING INVESTING ACTIVITIES		(3,659)	(8,585)	(5,256)
NET CASH PROVIDED BY DISCONTINUED OPERATIONS		4,335	(219)	(1,860)
NET CASH USED IN INVESTING ACTIVITIES		676	(8,804)	(7,116)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper, credit facility, and bank notes, net		(1,570)	1,568	(509)
Payments on fixed rate debt		(939)		(2,072)
Dividends paid		(377)	(365)	(360)
Distributions to noncontrolling interest		(129)	(140)
Proceeds from sale of noncontrolling interest				2,948
Shares repurchased			(1,864)	(997)
Other		53	49	21
NET CASH USED IN CONTINUING FINANCING ACTIVITIES		(2,962)	(752)	(969)
NET CASH USED IN DISCONTINUED OPERATIONS			(42)	(4)
NET CASH USED IN FINANCING ACTIVITIES		(2,962)	(794)	(973)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		698	(1,137)	1,746
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR		769	1,906	160
CASH AND CASH EQUIVALENTS AT END OF PERIOD	769	1,467	769	1,906
Reclassifications & Eliminations [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in subsidiaries, net		(6,363)	(1,459)
NET CASH USED IN CONTINUING INVESTING ACTIVITIES		(6,363)	(1,459)
NET CASH USED IN INVESTING ACTIVITIES		(6,363)	(1,459)
CASH FLOWS FROM FINANCING ACTIVITIES:
Intercompany borrowings		6,363	1,471
Other			(12)
NET CASH USED IN CONTINUING FINANCING ACTIVITIES		6,363	1,459
NET CASH USED IN FINANCING ACTIVITIES		6,363	1,459
Apache Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY CONTINUING OPERATING ACTIVITIES		395	6,691	1,421
CASH PROVIDED BY OPERATING ACTIVITIES		395	6,691	1,421
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property		(1,779)	(8,997)	(4,096)
Additions to gas gathering, transmission, and processing facilities		(156)	49	(124)
Proceeds from sale of Deepwater Gulf of Mexico assets			1,360
Proceeds from divestiture of Gulf of Mexico Shelf properties			1,262	3,702
Leasehold and property acquisitions		(313)	(1,087)	(195)
Proceeds from sale of oil and gas properties		163	15
Investment in subsidiaries, net		6,363	1,459
Other		(34)	(278)	(58)
NET CASH USED IN CONTINUING INVESTING ACTIVITIES		4,244	(6,217)	(771)
NET CASH USED IN INVESTING ACTIVITIES		4,244	(6,217)	(771)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper, credit facility, and bank notes, net		(1,570)	1,570	(501)
Intercompany borrowings		(1,639)		3,056
Payments on fixed rate debt		(939)		(1,722)
Dividends paid		(377)	(365)	(360)
Shares repurchased			(1,864)	(997)
Other		(3)	(5)	29
NET CASH USED IN CONTINUING FINANCING ACTIVITIES		(4,528)	(664)	(495)
NET CASH USED IN FINANCING ACTIVITIES		(4,528)	(664)	(495)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		111	(190)	155
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR		267	155
CASH AND CASH EQUIVALENTS AT END OF PERIOD	267	378	267	155
Apache Finance Canada [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY CONTINUING OPERATING ACTIVITIES		18	17	315
CASH PROVIDED BY OPERATING ACTIVITIES		18	17	315
CASH FLOWS FROM FINANCING ACTIVITIES:
Intercompany borrowings		(10)	8	1
Payments on fixed rate debt				(350)
Other			(28)	37
NET CASH USED IN CONTINUING FINANCING ACTIVITIES		(10)	(20)	(312)
NET CASH USED IN FINANCING ACTIVITIES		(10)	(20)	(312)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		8	(3)	3
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR			3
CASH AND CASH EQUIVALENTS AT END OF PERIOD		8		3
All Other Subsidiaries of Apache Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY CONTINUING OPERATING ACTIVITIES		2,421	809	6,949
CASH PROVIDED BY DISCONTINUED OPERATIONS		150	944	1,150
CASH PROVIDED BY OPERATING ACTIVITIES		2,571	1,753	8,099
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property		(2,799)	(25)	(4,567)
Additions to gas gathering, transmission, and processing facilities		(77)	(930)	(340)
Proceeds from sale of Deepwater Gulf of Mexico assets		854
Proceeds from divestiture of Gulf of Mexico Shelf properties		391
Leasehold and property acquisitions		(54)	(388)	(234)
Proceeds from Kitimat LNG transaction, net				396
Proceeds from sale of oil and gas properties		105	455	307
Other		40	(21)	(47)
NET CASH USED IN CONTINUING INVESTING ACTIVITIES		1,540	(909)	(4,485)
NET CASH PROVIDED BY DISCONTINUED OPERATIONS		4,335	(219)	(1,860)
NET CASH USED IN INVESTING ACTIVITIES		2,795	(1,128)	(6,345)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper, credit facility, and bank notes, net			(2)	(8)
Intercompany borrowings		(4,174)	(1,479)	(3,057)
Distributions to noncontrolling interest		(129)	(140)
Proceeds from sale of noncontrolling interest				2,948
Other		56	94	(45)
NET CASH USED IN CONTINUING FINANCING ACTIVITIES		(4,787)	(1,527)	(162)
NET CASH USED IN DISCONTINUED OPERATIONS			(42)	(4)
NET CASH USED IN FINANCING ACTIVITIES		(4,787)	(1,569)	(166)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		579	(944)	1,588
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR		502	1,748	160
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 502	$ 1,081	$ 502	$ 1,748