| Document and Entity Information | Feb. 20, 2020 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001528849 |
| Document Type | 8-K |
| Document Period End Date | Feb. 20, 2020 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-35720 |
| Entity Tax Identification Number | 45-3052669 |
| Entity Address, Address Line One | 15 Koch Road |
| Entity Address, Address Line Two | Suite K |
| Entity Address, City or Town | Corte Madera |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94925 |
| City Area Code | (415) |
| Local Phone Number | 924-1005 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.0001 par value |
| Entity Registrant Name | RH |
| Trading Symbol | RH |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
