| Document and Entity Information | Sep. 22, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Entity Registrant Name | Ceridian HCM Holding Inc. |
| Entity Central Index Key | 0001725057 |
| Document Period End Date | Sep. 22, 2021 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-38467 |
| Entity Tax Identification Number | 46-3231686 |
| Entity Address, Address Line One | 3311 East Old Shakopee Road |
| Entity Address, City or Town | Minneapolis |
| Entity Address, State or Province | MN |
| Entity Address, Postal Zip Code | 55425 |
| City Area Code | (952) |
| Local Phone Number | 853-8100 |
| Entity Incorporation State Country Code | DE |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common stock, $0.01 par value |
| Trading Symbol | CDAY |
| Security Exchange Name | NYSE |
