Supplemental Quarterly Financial Data - Supplemental Quarterly Financial Data (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012 Canada [Member]
Schedule Of Quarterly Financial Data [Line Items]
Write-down of the carrying value of Oil and Gas properties, net of tax	$ 659	$ 1,400

Unamortized costs capitalized less related deferred income taxes exceed ceiling limitations expense net of tax.

No definition available.

Name:	apa_UnamortizedCostsCapitalizedLessRelatedDeferredIncomeTaxesExceedCeilingLimitationsExpenseNetOfTax
Namespace Prefix:	apa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration