Supplemental Guarantor Information - Supplemental Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES			$ 983	$ 1,623
CASH PROVIDED BY DISCONTINUED OPERATIONS			0	159
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES			983	1,782
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property			(925)	(2,783)
Leasehold and property acquisitions	$ (99)	$ (36)	(118)	(128)
Additions to gas gathering, transmission, and processing facilities			0	(94)
Proceeds from sale of Kitimat LNG			0	854
Proceeds from sale of other oil and gas properties			48	119
Investment in subsidiaries, net			0	0
Other			(77)	67
NET CASH USED IN CONTINUING INVESTING ACTIVITIES			(966)	(2,099)
NET CASH PROVIDED BY DISCONTINUED OPERATIONS			0	4,372
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES			(966)	2,273
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net			0	(1,570)
Intercompany borrowings			0	0
Distributions to noncontrolling interest			(93)	(40)
Dividends paid			(189)	(189)
Other			(1)	15
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES				(1,784)
NET CASH PROVIDED BY DISCONTINUED OPERATIONS				0
NET CASH USED IN FINANCING ACTIVITIES			(283)	(1,784)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			(266)	2,271
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR			1,467	679
CASH AND CASH EQUIVALENTS AT END OF PERIOD	1,201	2,950	1,201	2,950
Reclassifications & Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES				0
CASH PROVIDED BY DISCONTINUED OPERATIONS				0
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES			0	0
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property			0	0
Leasehold and property acquisitions			0	0
Additions to gas gathering, transmission, and processing facilities				0
Proceeds from sale of Kitimat LNG				0
Proceeds from sale of other oil and gas properties				0
Investment in subsidiaries, net			39	(82)
Other			0	0
NET CASH USED IN CONTINUING INVESTING ACTIVITIES				(82)
NET CASH PROVIDED BY DISCONTINUED OPERATIONS				0
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES			39	(82)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net				0
Intercompany borrowings			(39)	82
Distributions to noncontrolling interest			0	0
Dividends paid			0	0
Other			0	0
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES				82
NET CASH PROVIDED BY DISCONTINUED OPERATIONS				0
NET CASH USED IN FINANCING ACTIVITIES			(39)	82
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			0	0
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR			0	0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	0	0	0	0
Apache Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES				54
CASH PROVIDED BY DISCONTINUED OPERATIONS				0
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES			110	54
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property			(53)	(1,095)
Leasehold and property acquisitions			(53)	(124)
Additions to gas gathering, transmission, and processing facilities				(24)
Proceeds from sale of Kitimat LNG				0
Proceeds from sale of other oil and gas properties				4
Investment in subsidiaries, net			(39)	82
Other			3	16
NET CASH USED IN CONTINUING INVESTING ACTIVITIES				(1,173)
NET CASH PROVIDED BY DISCONTINUED OPERATIONS				0
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES			(148)	(1,173)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net				(1,570)
Intercompany borrowings			0	4,562
Distributions to noncontrolling interest			0	0
Dividends paid			(189)	(189)
Other			1	2
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES				2,805
NET CASH PROVIDED BY DISCONTINUED OPERATIONS				0
NET CASH USED IN FINANCING ACTIVITIES			(188)	2,805
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			(226)	1,686
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR			378	267
CASH AND CASH EQUIVALENTS AT END OF PERIOD	152	1,953	152	1,953
Apache Finance Canada [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES				(21)
CASH PROVIDED BY DISCONTINUED OPERATIONS				0
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES			0	(21)
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property			0	0
Leasehold and property acquisitions			0	0
Additions to gas gathering, transmission, and processing facilities				0
Proceeds from sale of Kitimat LNG				0
Proceeds from sale of other oil and gas properties				0
Investment in subsidiaries, net			0	0
Other			0	0
NET CASH USED IN CONTINUING INVESTING ACTIVITIES				0
NET CASH PROVIDED BY DISCONTINUED OPERATIONS				0
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES			0	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net				0
Intercompany borrowings			1	(10)
Distributions to noncontrolling interest			0	0
Dividends paid			0	0
Other			(1)	31
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES				21
NET CASH PROVIDED BY DISCONTINUED OPERATIONS				0
NET CASH USED IN FINANCING ACTIVITIES			0	21
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			0	0
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR			0	0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	0	0	0	0
All Other Subsidiaries of Apache Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES				1,590
CASH PROVIDED BY DISCONTINUED OPERATIONS				159
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES			873	1,749
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property			(872)	(1,688)
Leasehold and property acquisitions			(65)	(4)
Additions to gas gathering, transmission, and processing facilities				(70)
Proceeds from sale of Kitimat LNG				854
Proceeds from sale of other oil and gas properties				115
Investment in subsidiaries, net			0	0
Other			(80)	51
NET CASH USED IN CONTINUING INVESTING ACTIVITIES				(844)
NET CASH PROVIDED BY DISCONTINUED OPERATIONS				4,372
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES			(857)	3,528
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net				0
Intercompany borrowings			38	(4,634)
Distributions to noncontrolling interest			(93)	(40)
Dividends paid			0	0
Other			(1)	(18)
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES				(4,692)
NET CASH PROVIDED BY DISCONTINUED OPERATIONS				0
NET CASH USED IN FINANCING ACTIVITIES			(56)	(4,692)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			(40)	585
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR			1,089	412
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 1,049	$ 997	$ 1,049	$ 997

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