| Document And Entity Information | Nov. 01, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 01, 2023 |
| Entity Registrant Name | BUILDERS FIRSTSOURCE, INC. |
| Entity Central Index Key | 0001316835 |
| Entity Emerging Growth Company | false |
| Securities Act File Number | 001-40620 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 52-2084569 |
| Entity Address, Address Line One | 6031 Connection Drive |
| Entity Address, Address Line Two | Suite 400 |
| Entity Address, City or Town | Irving |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75039 |
| City Area Code | (214) |
| Local Phone Number | 880-3500 |
| 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 | BLDR |
| Security Exchange Name | NYSE |
