XML 62 R48.htm IDEA: XBRL DOCUMENT v3.10.0.1

Customer Trust Fund - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investment income from invested customer trust fund included in revenue	$ 16.2	$ 11.2	$ 33.8	$ 22.6
Maturities ranging from one to 120 days [Member]
Average customer trust funds held in liquidity portfolios, Percentage			46.00%
Maturities ranging from 120 days to10 years [Member]
Average customer trust funds held in fixed income portfolios, Percentage			54.00%

X

- Definition

Average customer trust funds maintained in fixed income portfolios percentage.

+ References

No definition available.

+ Details

Name:	cday_AverageCustomerTrustFundsMaintainedInFixedIncomePortfoliosPercentage
Namespace Prefix:	cday_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Average customer trust funds maintained in liquidity portfolios percentage.

+ References

No definition available.

+ Details

Name:	cday_AverageCustomerTrustFundsMaintainedInLiquidityPortfoliosPercentage
Namespace Prefix:	cday_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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

- Details

Name:	cday_PeriodsOfMaturityAxis=cday_MaturityPeriodOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	cday_PeriodsOfMaturityAxis=cday_MaturityPeriodTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: