v3.25.2
Cover Page - shares
 6 Months Ended
Jun. 30, 2025
Jul. 31, 2025
Entity Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 1-9210  
Entity Registrant Name OCCIDENTAL PETROLEUM CORPORATION  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 95-4035997  
Entity Address, Address Line One 5 Greenway Plaza  
Entity Address, Address Line Two Suite 110  
Entity Address, City or Town Houston,  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 77046  
City Area Code 713  
Local Phone Number 215-7000  
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 Common Stock, Shares Outstanding   984,439,742
Entity Central Index Key 0000797468  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Common Stock, $0.20 par value    
Entity Information [Line Items]    
Title of 12(b) Security Common Stock, $0.20 par value  
Trading Symbol OXY  
Security Exchange Name NYSE  
Warrants to Purchase Common Stock, $0.20 par value    
Entity Information [Line Items]    
Title of 12(b) Security Warrants to Purchase Common Stock, $0.20 par value  
Trading Symbol OXY WS  
Security Exchange Name NYSE