Cover Page - shares	9 Months Ended
	Sep. 30, 2024	Nov. 04, 2024
Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	001-38846
Entity Registrant Name	Lyft, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-8809830
Entity Address, Address Line One	185 Berry Street
Entity Address, Address Line Two	Suite 400
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94107
City Area Code	844
Local Phone Number	250-2773
Title of each class	Class A common stock, par value of $0.00001 per share
Trading Symbol(s)	LYFT
Name of each exchange on which registered	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001759509
Current Fiscal Year End Date	--12-31
Class A Common Stock
Entity Information
Entity Common Stock, Shares Outstanding		406,286,219
Class B Common Stock
Entity Information
Entity Common Stock, Shares Outstanding		8,530,629