| Document and Entity Information | Oct. 08, 2020 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001737204 |
| Document Type | 8-K |
| Document Period End Date | Oct. 8, 2020 |
| Entity Registrant Name | Riviera Resources, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 333-225927 |
| Entity Tax Identification Number | 82-5121920 |
| Entity Address, Address Line One | 717 Texas Avenue |
| Entity Address, Address Line Two | Suite 2000 |
| 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 | 840-4000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
