Revenue - Summary of Disaggregation of Revenue (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Total revenue	$ 301.2	$ 250.4	$ 594.5	$ 484.9
Cloud Dayforce Recurring [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	194.3	150.6	382.9	295.9
Cloud Dayforce Professional Services and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	46.2	38.0	87.8	74.8
Cloud Dayforce Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	240.5	188.6	470.7	370.7
Cloud Powerpay Recurring [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	22.3	20.5	43.9	40.8
Cloud Powerpay Professional Services and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	0.1	0.3	0.3	0.6
Cloud Powerpay Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	22.4	20.8	44.2	41.4
Cloud Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	262.9	209.4	514.9	412.1
Bureau Recurring Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	34.5	37.0	72.2	67.4
Bureau Professional Services and Other Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	3.8	4.0	7.4	5.4
Bureau Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 38.3	$ 41.0	$ 79.6	$ 72.8