Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2024	May 01, 2024
Cover [Abstract]
Entity Registrant Name	BUILDERS FIRSTSOURCE, INC.
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Trading Symbol	BLDR
Security Exchange Name	NYSE
Entity Central Index Key	0001316835
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Title of 12(b) Security	Common stock, par value $0.01 per share
Entity Common Stock, Shares Outstanding		122,057,169
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity 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
Document Quarterly Report	true
Document Transition Report	false