| Cover | Jul. 22, 2020 | Apr. 23, 2020 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Jul. 22, 2020 | |
| Entity Registrant Name | NVR, Inc. | |
| Entity Incorporation, State or Country Code | VA | |
| Entity File Number | 1-12378 | |
| Entity Central Index Key | 0000906163 | |
| Amendment Flag | false | |
| Entity Tax Identification Number | 54-1394360 | |
| Entity Address, Address Line One | 11700 Plaza America Drive, Suite 500 | |
| Entity Address, City or Town | Reston | |
| Entity Address, State or Province | VA | |
| Entity Address, Postal Zip Code | 20190 | |
| City Area Code | 703 | |
| Local Phone Number | 956-4000 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Title of 12(b) Security | Common stock, par value $0.01 per share | |
| Trading Symbol | NVR | |
| Security Exchange Name | NYSE | |
| Entity Emerging Growth Company | false |
