| Cover | Nov. 05, 2019 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 5, 2019 |
| Entity File Number | 1-36486 |
| Entity Registrant Name | CDK Global, Inc. |
| Entity Central Index Key | 0001609702 |
| Entity Tax Identification Number | 46-5743146 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1950 Hassell Road |
| Entity Address, City or Town | Hoffman Estates |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 60169 |
| City Area Code | 847 |
| Local Phone Number | 397-1700 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 Par Value |
| Trading Symbol | CDK |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
