v3.22.2.2
Cover - shares
 9 Months Ended
Sep. 30, 2022
Nov. 04, 2022
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2022  
Document Transition Report false  
Entity File Number 001-35618  
Entity Registrant Name LegalZoom.com, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 95-4752856  
Entity Address, Address Line One 101 North Brand Boulevard  
Entity Address, Address Line Two 11th Floor  
Entity Address, City or Town Glendale  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 91203  
City Area Code 323  
Local Phone Number 962-8600  
Title of 12(b) Security Common Stock, par value $0.001 per share  
Trading Symbol LZ  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   192,649,274
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0001286139