Document And Entity Information - shares
3 Months Ended
Mar. 31, 2019
Apr. 30, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Document Period End Date Mar. 31, 2019  
Amendment Flag false  
Trading Symbol RVRA  
Entity Registrant Name Riviera Resources, Inc.  
Entity Central Index Key 0001737204  
Current Fiscal Year End --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   65,441,848
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1