v3.19.2
Cover Page - shares
6 Months Ended
Jun. 30, 2019
Aug. 01, 2019
Cover page.    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2019  
Document Transition Report false  
Entity File Number 001-36449  
Entity Registrant Name TRUECAR, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 04-3807511  
Entity Address, Address Line One 120 Broadway  
Entity Address, Address Line Two Suite 200  
Entity Address, City or Town Santa Monica  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 90401  
City Area Code 800  
Local Phone Number 200-2000  
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  
Title of 12(b) Security Common Stock, par value $0.0001 per share  
Trading Symbol TRUE  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   106,184,703
Entity Central Index Key 0001327318  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Amendment Flag false