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Revenue - Summary of Disaggregation of Revenue (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation Of Revenue [Line Items]
Total revenue	$ 154.6	$ 126.9
Dayforce [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	132.8	104.1
Powerpay [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	21.8	22.8
HCM [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	203.7	188.8
HCM [Member] | Cloud recurring services revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	124.4	99.9
HCM [Member] | Cloud professional services revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	30.2	27.0
HCM [Member] | Cloud Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	154.6	126.9
HCM [Member] | Bureau recurring services revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	48.4	61.0
HCM [Member] | Bureau professional services revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	0.7	0.9
HCM [Member] | Bureau Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 49.1	$ 61.9

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
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-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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