Supplemental Guarantor Information - Supplemental Condensed Consolidating Statement of Operations (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
REVENUES AND OTHER:
Oil and gas production revenues	$ 1,572	$ 3,181	$ 5,162	$ 10,043
Derivative instrument gains (losses), net		273		79
Other	(76)	(13)	(59)	(4)
Total revenues and other	1,496	3,441	5,103	10,118
OPERATING EXPENSES:
Depreciation, depletion, and amortization	6,629	2,735	21,753	5,193
Asset retirement obligation accretion	37	39	109	115
Lease operating expenses	450	588	1,398	1,696
Gathering and transportation	58	67	163	203
Taxes other than income	104	124	232	482
Impairments	367		367
General and administrative	86	111	279	332
Transaction, reorganization, and separation		34	120	66
Financing costs, net	107	60	240	157
Total operating expenses	7,838	3,758	24,661	8,244
NET INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(6,342)	(317)	(19,558)	1,874
Provision (benefit) for income taxes	(791)	768	(4,671)	1,652
NET INCOME (LOSS) FROM CONTINUING OPERATIONS INCLUDING NONCONTROLLING INTEREST	(5,551)	(1,085)	(14,887)	222
Net income (loss) from discontinued operations, net of tax	(95)	(156)	(959)	(516)
Net income (loss) including noncontrolling interest	(5,646)	(1,241)	(15,846)	(294)
Net income attributable to noncontrolling interest	9	89	60	295
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	(5,655)	(1,330)	(15,906)	(589)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	(5,655)	(1,330)	(15,906)	(590)
Reclassifications & Eliminations [Member]
REVENUES AND OTHER:
Equity in net income (loss) of affiliates	2,279	(497)	6,398	(1,297)
Other		2	19	5
Total revenues and other	2,279	(495)	6,417	(1,292)
OPERATING EXPENSES:
General and administrative		2	19	5
Total operating expenses		2	19	5
NET INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	2,279	(497)	6,398	(1,297)
NET INCOME (LOSS) FROM CONTINUING OPERATIONS INCLUDING NONCONTROLLING INTEREST	2,279	(497)	6,398	(1,297)
Net income (loss) including noncontrolling interest	2,279	(497)	6,398	(1,297)
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	2,279	(497)	6,398	(1,297)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK				(1,297)
Apache Corporation [Member]
REVENUES AND OTHER:
Oil and gas production revenues	344	882	1,143	2,669
Equity in net income (loss) of affiliates	(1,759)	491	(4,831)	1,233
Derivative instrument gains (losses), net		320		175
Other	(63)	(34)	(113)	(106)
Total revenues and other	(1,478)	1,659	(3,801)	3,971
OPERATING EXPENSES:
Depreciation, depletion, and amortization	4,195	1,914	14,040	2,598
Asset retirement obligation accretion	4	8	11	23
Lease operating expenses	97	137	329	386
Gathering and transportation	9	15	25	43
Taxes other than income	30	67	97	193
Impairments	110		110
General and administrative	76	89	214	276
Transaction, reorganization, and separation		34	120	66
Financing costs, net	112	45	235	118
Total operating expenses	4,633	2,309	15,181	3,703
NET INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(6,111)	(650)	(18,982)	268
Provision (benefit) for income taxes	(463)	678	(3,255)	730
NET INCOME (LOSS) FROM CONTINUING OPERATIONS INCLUDING NONCONTROLLING INTEREST	(5,648)	(1,328)	(15,727)	(462)
Net income (loss) from discontinued operations, net of tax	(7)		(179)	(127)
Net income (loss) including noncontrolling interest	(5,655)	(1,328)	(15,906)	(589)
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	(5,655)	(1,328)	(15,906)	(589)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK				(590)
Apache Finance Canada [Member]
REVENUES AND OTHER:
Equity in net income (loss) of affiliates	(520)	5	(1,567)	58
Other	14	14	40	41
Total revenues and other	(506)	19	(1,527)	99
OPERATING EXPENSES:
Financing costs, net	10	11	31	31
Total operating expenses	10	11	31	31
NET INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(516)	8	(1,558)	68
Provision (benefit) for income taxes	4	2	9	4
NET INCOME (LOSS) FROM CONTINUING OPERATIONS INCLUDING NONCONTROLLING INTEREST	(520)	6	(1,567)	64
Net income (loss) including noncontrolling interest	(520)	6	(1,567)	64
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	(520)	6	(1,567)	64
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK				64
All Other Subsidiaries of Apache Corporation [Member]
REVENUES AND OTHER:
Oil and gas production revenues	1,228	2,299	4,019	7,374
Equity in net income (loss) of affiliates		1		6
Derivative instrument gains (losses), net		(47)		(96)
Other	(27)	5	(5)	56
Total revenues and other	1,201	2,258	4,014	7,340
OPERATING EXPENSES:
Depreciation, depletion, and amortization	2,434	821	7,713	2,595
Asset retirement obligation accretion	33	31	98	92
Lease operating expenses	353	451	1,069	1,310
Gathering and transportation	49	52	138	160
Taxes other than income	74	57	135	289
Impairments	257		257
General and administrative	10	20	46	51
Financing costs, net	(15)	4	(26)	8
Total operating expenses	3,195	1,436	9,430	4,505
NET INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(1,994)	822	(5,416)	2,835
Provision (benefit) for income taxes	(332)	88	(1,425)	918
NET INCOME (LOSS) FROM CONTINUING OPERATIONS INCLUDING NONCONTROLLING INTEREST	(1,662)	734	(3,991)	1,917
Net income (loss) from discontinued operations, net of tax	(88)	(156)	(780)	(389)
Net income (loss) including noncontrolling interest	(1,750)	578	(4,771)	1,528
Net income attributable to noncontrolling interest	9	89	60	295
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	$ (1,759)	$ 489	$ (4,831)	1,233
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK				$ 1,233