Supplemental Guarantor Information - Supplemental Condensed Consolidating Statement of Cash Flows (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES	$ 8,379	$ 9,603	$ 8,281
CASH PROVIDED BY DISCONTINUED OPERATIONS	82	232	223
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	8,461	9,835	8,504
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property	(9,721)	(9,612)	(7,428)
Additions to gas gathering, transmission, and processing facilities	(1,159)	(1,190)	(733)
Proceeds from sale of Deepwater Gulf of Mexico assets	1,360
Proceeds from divestiture of Gulf of Mexico Shelf properties		3,702
Acquisition of Cordillera			(2,666)
Proceeds from sale of Anadarko Basin and Southern Louisiana assets	1,262
Equity investment in Yara Pilbara Holdings Pty Limited			(439)
Leasehold and property acquisitions	(1,492)	(419)	(1,303)
Proceeds from Kitimat LNG transaction, net		396apa_ProceedsFromTransactionInProject
Proceeds from sale of oil and gas properties	470	307	27
Other	(272)	(90)	(555)
NET CASH PROVIDED BY (USED IN) CONTINUING INVESTING ACTIVITIES	(9,552)	(6,906)	(13,097)
NET CASH PROVIDED BY DISCONTINUED OPERATIONS	748	(210)	(327)
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(8,804)	(7,116)	(13,424)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper, credit facility, and bank notes, net	1,568	(509)	511
Fixed rate debt borrowings			4,978
Payments on fixed rate debt		(2,072)us-gaap_RepaymentsOfUnsecuredDebt	(400)us-gaap_RepaymentsOfUnsecuredDebt
Dividends paid	(365)us-gaap_PaymentsOfDividends	(360)us-gaap_PaymentsOfDividends	(332)us-gaap_PaymentsOfDividends
Distributions to noncontrolling interest	(140)
Proceeds from sale of noncontrolling interest		2,948
Treasury stock activity, net	(1,864)us-gaap_ProceedsFromSaleOfTreasuryStock
Shares repurchased	(1,864)	(997)
Other	49	21	(10)
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES	(752)	(969)	4,747
NET CASH PROVIDED BY DISCONTINUED OPERATIONS	(42)	(4)	38
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	(794)	(973)	4,785
NET DECREASE IN CASH AND CASH EQUIVALENTS	(1,137)	1,746	(135)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	1,906	160	295
CASH AND CASH EQUIVALENTS AT END OF PERIOD	769	1,906	160
Reclassifications & Eliminations [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in subsidiaries, net	(2,168)		657
NET CASH PROVIDED BY (USED IN) CONTINUING INVESTING ACTIVITIES	(2,168)		657
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(2,168)		657
CASH FLOWS FROM FINANCING ACTIVITIES:
Intercompany borrowings	2,180		(697)
Other	(12)		40
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES	2,168		(657)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	2,168		(657)
Apache Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES	6,691	1,421	2,357
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	6,691	1,421	2,357
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property	(9,706)	(4,096)	(2,308)
Additions to gas gathering, transmission, and processing facilities	49	(124)	(48)
Proceeds from sale of Deepwater Gulf of Mexico assets	1,360
Proceeds from divestiture of Gulf of Mexico Shelf properties		3,702
Acquisition of Cordillera			(2,666)
Proceeds from sale of Anadarko Basin and Southern Louisiana assets	1,262
Leasehold and property acquisitions	(1,087)	(195)	(1,071)
Proceeds from sale of oil and gas properties	15		25
Investment in subsidiaries, net	2,168		(657)
Other	(278)	(58)	(450)
NET CASH PROVIDED BY (USED IN) CONTINUING INVESTING ACTIVITIES	(6,217)	(771)	(7,175)
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(6,217)	(771)	(7,175)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper, credit facility, and bank notes, net	1,570	(501)	502
Intercompany borrowings		3,056
Fixed rate debt borrowings			4,978
Payments on fixed rate debt		(1,722)	(400)
Dividends paid	(365)	(360)	(332)
Treasury stock activity, net	(1,864)
Shares repurchased		(997)
Other	(5)	29	29
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES	(664)	(495)	4,777
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	(664)	(495)	4,777
NET DECREASE IN CASH AND CASH EQUIVALENTS	(190)	155	(41)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	155		41
CASH AND CASH EQUIVALENTS AT END OF PERIOD	267	155
Apache Finance Canada [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES	17	315	(40)
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	17	315	(40)
CASH FLOWS FROM FINANCING ACTIVITIES:
Intercompany borrowings	8	1
Payments on fixed rate debt		(350)
Other	(28)	37	35
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES	(20)	(312)	35
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	(20)	(312)	35
NET DECREASE IN CASH AND CASH EQUIVALENTS	(3)	3	(5)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	3		5
CASH AND CASH EQUIVALENTS AT END OF PERIOD		3
All Other Subsidiaries of Apache Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES	1,671	7,867	5,964
CASH PROVIDED BY DISCONTINUED OPERATIONS	82	232	223
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	1,753	8,099	6,187
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to oil and gas property	(15)	(5,516)	(5,120)
Additions to gas gathering, transmission, and processing facilities	(1,208)	(1,066)	(685)
Equity investment in Yara Pilbara Holdings Pty Limited			(439)
Leasehold and property acquisitions	(405)	(224)	(232)
Proceeds from Kitimat LNG transaction, net		396
Proceeds from sale of oil and gas properties	455	307	2
Other	6	(32)	(105)
NET CASH PROVIDED BY (USED IN) CONTINUING INVESTING ACTIVITIES	(1,167)	(6,135)	(6,579)
NET CASH PROVIDED BY DISCONTINUED OPERATIONS	748	(210)	(327)
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(419)	(6,345)	(6,906)
CASH FLOWS FROM FINANCING ACTIVITIES:
Commercial paper, credit facility, and bank notes, net	(2)	(8)	9
Intercompany borrowings	(2,188)	(3,057)	697
Distributions to noncontrolling interest	(140)
Proceeds from sale of noncontrolling interest		2,948
Other	94	(45)	(114)
NET CASH PROVIDED BY (USED IN) CONTINUING FINANCING ACTIVITIES	(2,236)	(162)	592
NET CASH PROVIDED BY DISCONTINUED OPERATIONS	(42)	(4)	38
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	(2,278)	(166)	630
NET DECREASE IN CASH AND CASH EQUIVALENTS	(944)	1,588	(89)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	1,748	160	249
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 502	$ 1,748	$ 160

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The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates.

+ References

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- Definition

The net cash inflow or outflow in other borrowings not otherwise defined in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The cash inflow resulting from the sale of an interest in a corporate unit during the period.

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- Definition

The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.

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- Definition

The cash inflow from the sale of other tangible or intangible assets used to produce goods or deliver services not otherwise defined in the taxonomy.

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- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

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- Definition

The cash inflow from the issuance of an equity stock that has been previously reacquired by the entity.

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- Definition

The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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