v2.4.0.8
Document and Entity Information
9 Months Ended
Sep. 30, 2015
Oct. 29, 2015
Class A Common Stock
Oct. 29, 2015
Class B Common Stock
Oct. 29, 2015
Class C Capital Stock
Document Information [Line Items]        
Document Type 10-Q      
Amendment Flag false      
Document Period End Date Sep. 30, 2015      
Document Fiscal Year Focus 2015      
Document Fiscal Period Focus Q3      
Trading Symbol ZG      
Entity Registrant Name Zillow Group, Inc.      
Entity Central Index Key 0001617640      
Current Fiscal Year End Date --12-31      
Entity Filer Category Large Accelerated Filer      
Entity Common Stock, Shares Outstanding   53,122,181 6,217,447 118,625,861