| Document and Entity Information | Jul. 13, 2021 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001707178 |
| Document Type | 8-K |
| Document Period End Date | Jul. 13, 2021 |
| Entity Registrant Name | CorePoint Lodging Inc. |
| Entity Incorporation State Country Code | MD |
| Entity File Number | 001-38168 |
| Entity Tax Identification Number | 82-1497742 |
| Entity Address, Address Line One | 125 E. John Carpenter Freeway |
| Entity Address, Address Line Two | Suite 1650 |
| Entity Address, City or Town | Irving |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75062 |
| City Area Code | (972) |
| Local Phone Number | 893-3199 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.01 par value per share |
| Trading Symbol | CPLG |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | true |
