XML 61 R49.htm IDEA: XBRL DOCUMENT
v3.19.1

Customer Trust Fund - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Investments Debt And Equity Securities [Abstract] |  |
Investment income from invested customer trust fund included in revenue | $ 24.3 | $ 17.6

X
- Definition Investment Income From Invested Customer Trust Fund + References No definition available. + Details
Name: | cday_InvestmentIncomeFromInvestedCustomerTrustFund
Namespace Prefix: | cday_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration