Supplemental Guarantor Information - Supplemental Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES			$ 1,737	$ 3,949
CASH PROVIDED BY DISCONTINUED OPERATIONS			196	683
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES			1,933	4,632
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property			(2,987)	(4,369)
Leasehold and property acquisitions	$ (36)	$ (64)	(128)	(112)
Additions to gas gathering, transmission, and processing facilities			(94)	(345)
Proceeds from sale of Deepwater Gulf of Mexico assets				1,367
Proceeds from sale of Kitimat LNG			854
Restricted cash related to divestitures				(1,367)
Proceeds from sale of other oil and gas properties			119	381
Other			(67)	(33)
NET CASH PROVIDED BY (USED IN) CONTINUING INVESTING ACTIVITIES			(2,303)	(4,478)
NET CASH PROVIDED BY (USED IN) DISCONTINUED OPERATIONS			4,335	(13)
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES			2,032	(4,491)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net			(1,570)	(1)
Distributions to noncontrolling interest			(40)	(66)
Dividends paid			(189)	(176)
Treasury stock activity, net				(1,263)
Other			15	25
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES			(1,784)	(1,481)
NET CASH USED IN DISCONTINUED OPERATIONS				(42)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES			(1,784)	(1,523)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			2,181	(1,382)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR			769	1,906
CASH AND CASH EQUIVALENTS AT END OF PERIOD	2,950	524	2,950	524
Reclassifications & Eliminations [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in subsidiaries, net			(82)	(2,899)
NET CASH PROVIDED BY (USED IN) CONTINUING INVESTING ACTIVITIES			(82)	(2,899)
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES			(82)	(2,899)
CASH FLOWS FROM FINANCING ACTIVITIES:
Intercompany borrowings			82	2,898
Other				1
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES			82	2,899
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES			82	2,899
Apache Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES			192	70
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES			192	70
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property			(1,222)	(1,625)
Leasehold and property acquisitions			(124)	(83)
Additions to gas gathering, transmission, and processing facilities			(24)	(2)
Proceeds from sale of Deepwater Gulf of Mexico assets				1,367
Restricted cash related to divestitures				(1,367)
Proceeds from sale of other oil and gas properties			4	69
Investment in subsidiaries, net			82	2,899
Other			(16)	(35)
NET CASH PROVIDED BY (USED IN) CONTINUING INVESTING ACTIVITIES			(1,300)	1,223
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES			(1,300)	1,223
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net			(1,570)
Intercompany borrowings			4,551
Dividends paid			(189)	(176)
Treasury stock activity, net				(1,263)
Other			2
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES			2,794	(1,439)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES			2,794	(1,439)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			1,686	(146)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR			267	155
CASH AND CASH EQUIVALENTS AT END OF PERIOD	1,953	9	1,953	9
Apache Finance Canada [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES			(21)	(33)
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES			(21)	(33)
CASH FLOWS FROM FINANCING ACTIVITIES:
Intercompany borrowings			(10)	11
Other			31	19
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES			21	30
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES			21	30
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS				(3)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR				3
All Other Subsidiaries of Apache Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES			1,566	3,912
CASH PROVIDED BY DISCONTINUED OPERATIONS			196	683
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES			1,762	4,595
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property			(1,765)	(2,744)
Leasehold and property acquisitions			(4)	(29)
Additions to gas gathering, transmission, and processing facilities			(70)	(343)
Proceeds from sale of Kitimat LNG			854
Proceeds from sale of other oil and gas properties			115	312
Other			(51)	2
NET CASH PROVIDED BY (USED IN) CONTINUING INVESTING ACTIVITIES			(921)	(2,802)
NET CASH PROVIDED BY (USED IN) DISCONTINUED OPERATIONS			4,335	(13)
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES			3,414	(2,815)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net				(1)
Intercompany borrowings			(4,623)	(2,909)
Distributions to noncontrolling interest			(40)	(66)
Other			(18)	5
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES			(4,681)	(2,971)
NET CASH USED IN DISCONTINUED OPERATIONS				(42)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES			(4,681)	(3,013)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			495	(1,233)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR			502	1,748
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 997	$ 515	$ 997	$ 515