Supplemental Guarantor Information - Cash Flows (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES			$ 1,206	$ 983
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property			(883)	(925)
Leasehold and property acquisitions	$ (18)	$ (99)	(67)	(118)
Additions to gas gathering, transmission, and processing facilities			(274)	0
Proceeds from sale of Midale and House Mountain			228	0
Proceeds from sale of oil and gas properties			483	48
Investment in subsidiaries, net			0	0
Other			(16)	77
NET CASH USED IN INVESTING ACTIVITIES			(529)	(966)
CASH FLOWS FROM FINANCING ACTIVITIES:
Intercompany borrowings			0	0
Payments on fixed-rate debt			(70)	0
Distributions to noncontrolling interest			(170)	(93)
Common stock activity, net			0
Dividends paid			(190)	(189)
Other			43	(1)
NET CASH USED IN FINANCING ACTIVITIES			(387)	(283)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			290	(266)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR			1,377	1,467
CASH AND CASH EQUIVALENTS AT END OF PERIOD	1,667	1,201	1,667	1,201
Reclassifications & Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
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 Midale and House Mountain			0
Proceeds from sale of oil and gas properties			0
Investment in subsidiaries, net			(668)	39
Other			0	0
NET CASH USED IN INVESTING ACTIVITIES			(668)	39
CASH FLOWS FROM FINANCING ACTIVITIES:
Intercompany borrowings			668	(39)
Payments on fixed-rate debt			0
Distributions to noncontrolling interest			0	0
Common stock activity, net			0
Dividends paid			0	0
Other			0	0
NET CASH USED IN FINANCING ACTIVITIES			668	(39)
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) OPERATING ACTIVITIES			(280)	110
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property			(235)	(53)
Leasehold and property acquisitions			(58)	(53)
Additions to gas gathering, transmission, and processing facilities			0
Proceeds from sale of Midale and House Mountain			0
Proceeds from sale of oil and gas properties			0
Investment in subsidiaries, net			668	(39)
Other			(9)	(3)
NET CASH USED IN INVESTING ACTIVITIES			366	(148)
CASH FLOWS FROM FINANCING ACTIVITIES:
Intercompany borrowings			0	0
Payments on fixed-rate debt			(70)
Distributions to noncontrolling interest			0	0
Common stock activity, net			0
Dividends paid			(190)	(189)
Other			0	1
NET CASH USED IN FINANCING ACTIVITIES			(260)	(188)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			(174)	(226)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR			344	378
CASH AND CASH EQUIVALENTS AT END OF PERIOD	170	152	170	152
Apache Finance Canada [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES			(13)	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 Midale and House Mountain			0
Proceeds from sale of oil and gas properties			0
Investment in subsidiaries, net			0	0
Other			0	0
NET CASH USED IN INVESTING ACTIVITIES			0	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Intercompany borrowings			259	1
Payments on fixed-rate debt			0
Distributions to noncontrolling interest			0	0
Dividends paid			0	0
Other			0	(1)
NET CASH USED IN FINANCING ACTIVITIES			259	0
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			246	0
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR			0	0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	246	0	246	0
All Other Subsidiaries of Apache Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES			1,499	873
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property			(648)	(872)
Leasehold and property acquisitions			(9)	(65)
Additions to gas gathering, transmission, and processing facilities			(274)
Proceeds from sale of Midale and House Mountain			228
Proceeds from sale of oil and gas properties			483
Investment in subsidiaries, net			0	0
Other			(7)	80
NET CASH USED IN INVESTING ACTIVITIES			(227)	(857)
CASH FLOWS FROM FINANCING ACTIVITIES:
Intercompany borrowings			(927)	38
Payments on fixed-rate debt			0
Distributions to noncontrolling interest			(170)	(93)
Common stock activity, net			0
Dividends paid			0	0
Other			43	(1)
NET CASH USED IN FINANCING ACTIVITIES			(1,054)	(56)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			218	(40)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR			1,033	1,089
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 1,251	$ 1,049	1,251	$ 1,049
All Other Subsidiaries [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Common stock activity, net			$ 0

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