XML 24 R1.htm IDEA: XBRL DOCUMENT v3.20.1
Cover Page - shares
 3 Months Ended
Mar. 31, 2020
May 14, 2020
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2020  
Document Transition Report false  
Entity File Number 1-34776  
Entity Registrant Name Oasis Petroleum Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 80-0554627  
Entity Address, Address Line One 1001 Fannin Street  
Entity Address, Address Line Two Suite 1500  
Entity Address, City or Town Houston  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 77002  
City Area Code 281  
Local Phone Number 404-9500  
Title of 12(b) Security Common Stock  
Trading Symbol OAS  
Security Exchange Name NASDAQ  
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   324,040,513
Document Fiscal Year Focus 2020  
Amendment Flag false  
Document Fiscal Period Focus Q1  
Entity Central Index Key 0001486159  
Current Fiscal Year End Date --12-31