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BUSINESS SEGMENT INFORMATION - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2012 Country
Production in number of countries	6

X

- Definition

Number Of Countries Company Operates

+ References

No definition available.

+ Details

Name:	apa_NumberOfCountriesCompanyOperates
Namespace Prefix:	apa_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration