v3.3.1.900
Document And Entity Information - shares
6 Months Ended
Dec. 31, 2015
Jan. 29, 2016
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Dec. 31, 2015  
Entity Registrant Name CDK Global, Inc.  
Entity Central Index Key 0001609702  
Current Fiscal Year End Date --06-30  
Entity Filer Category Non-accelerated Filer  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q2  
Entity Common Stock, Shares Outstanding   155,276,390