Revenue - Summary of Disaggregation of Revenue (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Total revenue	$ 315.6	$ 257.2	$ 910.1	$ 742.1
Cloud Dayforce Recurring [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	207.8	160.3	590.7	456.2
Cloud Dayforce Professional Services and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	46.4	38.4	134.2	113.2
Cloud Dayforce Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	254.2	198.7	724.9	569.4
Cloud Powerpay Recurring [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	22.6	20.7	66.5	61.5
Cloud Powerpay Professional Services and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	0.1	0.2	0.4	0.8
Cloud Powerpay Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	22.7	20.9	66.9	62.3
Cloud Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	276.9	219.6	791.8	631.7
Bureau Recurring Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	33.4	34.0	105.6	101.4
Bureau Professional Services and Other Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	5.3	3.6	12.7	9.0
Bureau Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 38.7	$ 37.6	$ 118.3	$ 110.4