v3.10.0.1
Document And Entity Information - shares
3 Months Ended
Sep. 30, 2018
Nov. 05, 2018
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2018  
Entity Registrant Name CDK Global, Inc.  
Entity Central Index Key 0001609702  
Current Fiscal Year End Date --06-30  
Entity Filer Category Large Accelerated Filer  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Entity Common Stock, Shares Outstanding   128,773,455