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Cover - USD ($)
 12 Months Ended
Dec. 31, 2019
Jan. 31, 2020
Jun. 28, 2019
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 1-4300    
Entity Registrant Name APACHE CORPORATION    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 41-0747868    
Entity Address, Address Line One One Post Oak Central, 2000 Post Oak Boulevard, Suite 100,    
Entity Address, City or Town Houston,    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77056-4400    
City Area Code 713    
Local Phone Number 296-6000    
Title of 12(g) Security None    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 10,891,448,883
Entity Common Stock, Shares Outstanding   377,316,159  
Documents Incorporated by Reference
Portions of registrant’s proxy statement relating to registrant’s 2020 annual meeting of stockholders have been incorporated by reference in Part II and Part III of this Annual Report on Form 10-K.
    
Amendment Flag false    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000006769    
Current Fiscal Year End Date --12-31    
New York Stock Exchange | Common Stock      
Entity Information [Line Items]      
Title of 12(b) Security Common Stock, $0.625 par value    
Trading Symbol APA    
Security Exchange Name NYSE    
New York Stock Exchange | 7.75% Notes Due 2029      
Entity Information [Line Items]      
Title of 12(b) Security 7.75% Notes Due 2029    
Trading Symbol APA/29    
Security Exchange Name NYSE    
Chicago Stock Exchange | Common Stock      
Entity Information [Line Items]      
Title of 12(b) Security Common Stock, $0.625 par value    
Trading Symbol APA    
Security Exchange Name CHX    
Nasdaq Global Select Market | Common Stock      
Entity Information [Line Items]      
Title of 12(b) Security Common Stock, $0.625 par value    
Trading Symbol APA    
Security Exchange Name NASDAQ