Supplemental Guarantor Information - Supplemental Condensed Consolidating Statement of Cash Flows (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015		Sep. 30, 2016		Sep. 30, 2015
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES				$ 1,634		$ 2,380	[1]
CASH PROVIDED BY DISCONTINUED OPERATIONS				0		113	[1]
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES				1,634		2,493	[1]
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property				(1,281)		(3,562)	[1]
Leasehold and property acquisitions	$ (51)	$ (126)		(169)		(254)	[1]
Additions to gas gathering, transmission, and processing facilities				(33)		(113)	[1]
Proceeds from sale of Kitimat LNG project				0		854	[1]
Proceeds from sale of other oil and gas properties				74		148	[1]
Investment in subsidiaries, net				0		0
Other				47		(99)
NET CASH USED IN CONTINUING INVESTING ACTIVITIES				(1,362)		(3,026)	[1]
NET CASH PROVIDED BY DISCONTINUED OPERATIONS				0		4,372	[1]
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES				(1,362)		1,346	[1]
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net				0		(1,570)	[1]
Intercompany borrowings				0		0
Payment of fixed-rate debt				(1)		(939)	[1]
Distributions to noncontrolling interest				(215)		(97)	[1]
Common stock activity, net				0
Dividends paid				(284)		(283)	[1]
Other				(9)		26	[1]
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES						(2,863)
NET CASH USED IN DISCONTINUED OPERATIONS						0
NET CASH USED IN FINANCING ACTIVITIES				(509)		(2,863)	[1]
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS				(237)		976	[1]
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR				1,467	[2]	679	[1]
CASH AND CASH EQUIVALENTS AT END OF PERIOD	1,230	1,655	[1]	1,230		1,655	[1]
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		0
Proceeds from sale of Kitimat LNG project						0
Proceeds from sale of other oil and gas properties				0		0
Investment in subsidiaries, net				(824)		(274)
Other				0		0
NET CASH USED IN CONTINUING INVESTING ACTIVITIES						(274)
NET CASH PROVIDED BY DISCONTINUED OPERATIONS						0
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES				(824)		(274)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net						0
Intercompany borrowings				824		274
Payment of fixed-rate debt				0		0
Distributions to noncontrolling interest				0		0
Common stock activity, net				0
Dividends paid				0		0
Other				0		0
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES						274
NET CASH USED IN DISCONTINUED OPERATIONS						0
NET CASH USED IN FINANCING ACTIVITIES				824		274
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						(135)
CASH PROVIDED BY DISCONTINUED OPERATIONS						0
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES				269		(135)
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property				(929)		(1,320)
Leasehold and property acquisitions				(98)		(243)
Additions to gas gathering, transmission, and processing facilities				(32)		(25)
Proceeds from sale of Kitimat LNG project						0
Proceeds from sale of other oil and gas properties				54		8
Investment in subsidiaries, net				824		274
Other				(7)		(16)
NET CASH USED IN CONTINUING INVESTING ACTIVITIES						(1,322)
NET CASH PROVIDED BY DISCONTINUED OPERATIONS						0
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES				(188)		(1,322)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net						(1,570)
Intercompany borrowings				0		4,431
Payment of fixed-rate debt				0		(939)
Distributions to noncontrolling interest				0		0
Common stock activity, net				0
Dividends paid				(284)		(283)
Other				2		2
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES						1,641
NET CASH USED IN DISCONTINUED OPERATIONS						0
NET CASH USED IN FINANCING ACTIVITIES				(282)		1,641
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS				(201)		184
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR				378		267
CASH AND CASH EQUIVALENTS AT END OF PERIOD	177	451		177		451
Apache Finance Canada [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES						(25)
CASH PROVIDED BY DISCONTINUED OPERATIONS						0
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES				(1)		(25)
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		0
Proceeds from sale of Kitimat LNG project						0
Proceeds from sale of other oil and gas properties				0		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				(23)		(10)
Payment of fixed-rate debt				0		0
Distributions to noncontrolling interest				0		0
Common stock activity, net				24
Dividends paid				0		0
Other				0		35
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES						25
NET CASH USED IN DISCONTINUED OPERATIONS						0
NET CASH USED IN FINANCING ACTIVITIES				1		25
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						2,540
CASH PROVIDED BY DISCONTINUED OPERATIONS						113
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES				1,366		2,653
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property				(352)		(2,242)
Leasehold and property acquisitions				(71)		(11)
Additions to gas gathering, transmission, and processing facilities				(1)		(88)
Proceeds from sale of Kitimat LNG project						854
Proceeds from sale of other oil and gas properties				20		140
Investment in subsidiaries, net				0		0
Other				54		(83)
NET CASH USED IN CONTINUING INVESTING ACTIVITIES						(1,430)
NET CASH PROVIDED BY DISCONTINUED OPERATIONS						4,372
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES				(350)		2,942
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper and bank credit facilities, net						0
Intercompany borrowings				(801)		(4,695)
Payment of fixed-rate debt				(1)		0
Distributions to noncontrolling interest				(215)		(97)
Common stock activity, net				(24)
Dividends paid				0		0
Other				(11)		(11)
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES						(4,803)
NET CASH USED IN DISCONTINUED OPERATIONS						0
NET CASH USED IN FINANCING ACTIVITIES				(1,052)		(4,803)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS				(36)		792
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR				1,089		412
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 1,053	$ 1,204		$ 1,053		$ 1,204

[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.