Supplemental Guarantor Information - Supplemental Condensed Consolidating Statement of Operations And Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
REVENUES AND OTHER:
Oil and gas production revenues	$ 3,468	$ 4,288	$ 10,823	$ 12,311
Equity in net income (loss) of affiliates	0		0
Derivative instrument gains (losses), net	273	(422)	79	(275)
Other	(1)	34	(3)	78
Total revenues and other	3,740	3,900	10,899	12,114
OPERATING EXPENSES:
Depreciation, depletion, and amortization	2,835	1,995	5,498	4,657
Asset retirement obligation accretion	46	65	135	192
Lease operating expenses	652	772	1,862	2,275
Gathering and transportation	67	81	203	231
Taxes other than income	170	176	532	574
General and administrative	112	120	309	359
Acquisition, divestiture, and separation costs	34		66
Financing costs, net	41	50	103	157
Total operating expenses	3,957	3,259	8,708	8,445
NET INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(217)	641	2,191	3,669
Provision (benefit) for income taxes	1,024	206	1,968	1,419
NET INCOME (LOSS) FROM CONTINUING OPERATIONS INCLUDING NONCONTROLLING INTEREST	(1,241)	435	223	2,250
Net loss from discontinued operations, net of tax	0	(129)	(517)	(192)
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	(1,241)	306	(294)	2,058
Net income attributable to noncontrolling interest	89		295
Preferred stock dividends		6		44
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	(1,330)	300	(589)	2,014
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	(1,330)	295	(590)	2,022
Reclassifications & Eliminations [Member]
REVENUES AND OTHER:
Oil and gas production revenues	0		0
Equity in net income (loss) of affiliates	(497)	(618)	(1,297)	(1,934)
Derivative instrument gains (losses), net	0		0
Other	2	(1)	5	(4)
Total revenues and other	(495)	(619)	(1,292)	(1,938)
OPERATING EXPENSES:
Depreciation, depletion, and amortization	0		0
Asset retirement obligation accretion	0		0
Lease operating expenses	0		0
Gathering and transportation	0		0
Taxes other than income	0		0
General and administrative	2	(1)	5	(4)
Acquisition, divestiture, and separation costs	0		0
Financing costs, net	0		0
Total operating expenses	2	(1)	5	(4)
NET INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(497)	(618)	(1,297)	(1,934)
Provision (benefit) for income taxes	0		0
NET INCOME (LOSS) FROM CONTINUING OPERATIONS INCLUDING NONCONTROLLING INTEREST	(497)	(618)	(1,297)	(1,934)
Net loss from discontinued operations, net of tax	0		0
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	(497)	(618)	(1,297)	(1,934)
Net income attributable to noncontrolling interest	0		0
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	(497)	(618)	(1,297)	(1,934)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	(497)	(618)	(1,297)	(1,934)
Apache Corporation [Member]
REVENUES AND OTHER:
Oil and gas production revenues	882	1,374	2,669	3,775
Equity in net income (loss) of affiliates	491	619	1,233	1,947
Derivative instrument gains (losses), net	320	(422)	175	(275)
Other	(34)	2	(106)	3
Total revenues and other	1,659	1,573	3,971	5,450
OPERATING EXPENSES:
Depreciation, depletion, and amortization	1,914	1,041	2,598	1,912
Asset retirement obligation accretion	8	20	23	60
Lease operating expenses	137	254	386	802
Gathering and transportation	15	18	43	49
Taxes other than income	67	62	193	163
General and administrative	89	103	276	305
Acquisition, divestiture, and separation costs	34		66
Financing costs, net	45	36	118	104
Total operating expenses	2,309	1,534	3,703	3,395
NET INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(650)	39	268	2,055
Provision (benefit) for income taxes	678	(267)	730	(3)
NET INCOME (LOSS) FROM CONTINUING OPERATIONS INCLUDING NONCONTROLLING INTEREST	(1,328)	306	(462)	2,058
Net loss from discontinued operations, net of tax	0		(127)
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	(1,328)	306	(589)	2,058
Net income attributable to noncontrolling interest	0		0
Preferred stock dividends		6		44
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	(1,328)	300	(589)	2,014
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	(1,328)	295	(590)	2,022
Apache Finance Canada [Member]
REVENUES AND OTHER:
Oil and gas production revenues	0		0
Equity in net income (loss) of affiliates	5	(4)	58	(21)
Derivative instrument gains (losses), net	0		0
Other	14	16	41	46
Total revenues and other	19	12	99	25
OPERATING EXPENSES:
Depreciation, depletion, and amortization	0		0
Asset retirement obligation accretion	0		0
Lease operating expenses	0		0
Gathering and transportation	0		0
Taxes other than income	0		0
General and administrative	0		0
Acquisition, divestiture, and separation costs	0		0
Financing costs, net	11	14	31	42
Total operating expenses	11	14	31	42
NET INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	8	(2)	68	(17)
Provision (benefit) for income taxes	2	(1)	4	(4)
NET INCOME (LOSS) FROM CONTINUING OPERATIONS INCLUDING NONCONTROLLING INTEREST	6	(1)	64	(13)
Net loss from discontinued operations, net of tax	0		0
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	6	(1)	64	(13)
Net income attributable to noncontrolling interest	0		0
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	6	(1)	64	(13)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	6	(1)	64	(13)
All Other Subsidiaries of Apache Corporation [Member]
REVENUES AND OTHER:
Oil and gas production revenues	2,586	2,914	8,154	8,536
Equity in net income (loss) of affiliates	1	3	6	8
Derivative instrument gains (losses), net	(47)		(96)
Other	17	17	57	33
Total revenues and other	2,557	2,934	8,121	8,577
OPERATING EXPENSES:
Depreciation, depletion, and amortization	921	954	2,900	2,745
Asset retirement obligation accretion	38	45	112	132
Lease operating expenses	515	518	1,476	1,473
Gathering and transportation	52	63	160	182
Taxes other than income	103	114	339	411
General and administrative	21	18	28	58
Acquisition, divestiture, and separation costs	0		0
Financing costs, net	(15)		(46)	11
Total operating expenses	1,635	1,712	4,969	5,012
NET INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	922	1,222	3,152	3,565
Provision (benefit) for income taxes	344	474	1,234	1,426
NET INCOME (LOSS) FROM CONTINUING OPERATIONS INCLUDING NONCONTROLLING INTEREST	578	748	1,918	2,139
Net loss from discontinued operations, net of tax	0	(129)	(390)	(192)
NET INCOME (LOSS) INCLUDING NONCONTROLLING INTEREST	578	619	1,528	1,947
Net income attributable to noncontrolling interest	89		295
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	489	619	1,233	1,947
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK	$ 489	$ 619	$ 1,233	$ 1,947