Dayforce (DAY) 10-Q 5 Nov 20 2020 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Oct. 30, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Trading Symbol	CDAY
Title of 12(b) Security	Common stock, $0.01 par value
Security Exchange Name	NYSE
Entity Registrant Name	Ceridian HCM Holding Inc.
Entity Central Index Key	0001725057
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Interactive Data Current	Yes
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-38467
Entity Incorporation State Country Code	DE
Entity Tax Identification Number	46-3231686
Entity Address Address Line1	3311 East Old Shakopee Road
Entity Address City Or Town	Minneapolis
Entity Address State Or Province	MN
Entity Address Postal Zip Code	55425
City Area Code	952
Local Phone Number	853-8100
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		147,803,003

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and equivalents	$ 554.6	$ 281.3
Trade and other receivables, net	91.4	80.4
Prepaid expenses and other current assets	78.7	57.9
Total current assets before customer trust funds	724.7	419.6
Customer trust funds	2,646.6	3,204.1
Total current assets	3,371.3	3,623.7
Right of use lease asset	37.5	32
Property, plant, and equipment, net	132.2	128.3
Goodwill	2,011.3	1,973.5
Other intangible assets, net	197.3	177.9
Other assets	168.4	150.3
Total assets	5,918	6,085.7
Current liabilities:
Current portion of long-term debt	7.7	10.8
Current portion of long-term lease liabilities	10.3	8.8
Accounts payable	26.6	43.2
Deferred revenue	26.1	25.5
Employee compensation and benefits	75.8	75.9
Other accrued expenses	13.7	13.9
Total current liabilities before customer trust funds obligations	160.2	178.1
Customer trust funds obligations	2,581.2	3,193.6
Total current liabilities	2,741.4	3,371.7
Long-term debt, less current portion	957.2	666.3
Employee benefit plans	108.2	117.2
Long-term lease liabilities, less current portion	34.1	30.1
Other liabilities	40.8	18.1
Total liabilities	3,881.7	4,203.4
Commitments and contingencies (Note 14)
Stockholders’ equity:
Common stock, $0.01 par, 500,000,000 shares authorized, 147,647,117 and 144,386,618 shares issued and outstanding, respectively	1.5	1.4
Additional paid in capital	2,565.5	2,449.1
Accumulated deficit	(216.5)	(229.8)
Accumulated other comprehensive loss	(314.2)	(338.4)
Total stockholders’ equity	2,036.3	1,882.3
Total liabilities and equity	$ 5,918	$ 6,085.7

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	500,000,000	500,000,000
Common Stock, shares issued	147,647,117	144,386,618
Common Stock, shares outstanding	147,647,117	144,386,618

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue:
Total revenue	$ 204.4	$ 202.3	$ 619.7	$ 602.3
Cost of revenue:
Recurring services	54.3	49.4	155.8	149
Professional services and other	40.2	37.6	120.7	107.1
Product development and management	22.9	17.5	57.5	49.1
Depreciation and amortization	10.3	9	29.9	26.7
Total cost of revenue	127.7	113.5	363.9	331.9
Gross profit	76.7	88.8	255.8	270.4
Selling, general, and administrative	77.3	82.3	226.1	217.8
Operating (loss) profit	(0.6)	6.5	29.7	52.6
Interest expense, net	5.9	7.8	19.4	25.2
Other (income) expense, net	(0.2)	1.6	2.7	4.7
(Loss) income before income taxes	(6.3)	(2.9)	7.6	22.7
Income tax benefit	(5.5)	(65.6)	(5.7)	(57.5)
Net (loss) income	$ (0.8)	$ 62.7	$ 13.3	$ 80.2
Net (loss) income per share:
Basic	$ (0.01)	$ 0.44	$ 0.09	$ 0.57
Diluted	$ (0.01)	$ 0.42	$ 0.09	$ 0.54
Weighted-average shares outstanding:
Basic	147,141,403	142,780,819	145,798,169	141,369,339
Diluted	147,141,403	149,153,227	152,105,719	148,279,943
Recurring Services [Member]
Revenue:
Total revenue	$ 168.1	$ 167.4	$ 508.7	$ 503.7
Professional Services and Other [Member]
Revenue:
Total revenue	$ 36.3	$ 34.9	$ 111	$ 98.6

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income		$ (0.8)	$ 62.7	$ 13.3	$ 80.2
Items of other comprehensive income before income taxes:
Change in foreign currency translation adjustment		12.8	(6.5)	(14.7)	17.3
Change in unrealized (loss) gain from invested customer trust funds		(0.2)	3.1	43.3	42.3
Change in pension liability adjustment	[1]	3.3	2.5	9.9	7.5
Other comprehensive income (loss) before income taxes		15.9	(0.9)	38.5	67.1
Income tax expense, net		1.4	8.8	14.3	12.4
Other comprehensive income (loss) after income taxes		14.5	(9.7)	24.2	54.7
Comprehensive income		$ 13.7	$ 53	$ 37.5	$ 134.9
[1]	The amount of the pension liability adjustment recognized in the condensed consolidated statements of operations within other (income) expense, net was $3.3 million and $2.6 million during the three months ended September 30, 2020, and 2019, respectively, and $9.9 million and $7.8 million during the nine months ended September 30, 2020, and 2019, respectively.

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Expense (Income), Net [Member]
Pension liability adjustment	$ 3.3	$ 2.6	$ 9.9	$ 7.8

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Accumulated Deficit [Member]	Accumulated Deficit [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Other Comprehensive Loss [Member]Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance at Dec. 31, 2018	$ 1,615.5	$ 1.4	$ 2,325.6	$ (335.6)	$ 27.1	$ (375.9)	$ (27.1)
Balance, shares at Dec. 31, 2018		139,453,710
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201802Member
Net income (loss)	$ 11.2			11.2
Issuance of common stock under share-based compensation plans	20.1		20.1
Issuance of common stock under share-based compensation plans, shares		1,221,622
Share-based compensation	6		6
Foreign currency translation	12.3					12.3
Change in unrealized gain (loss), net of tax	19.2					19.2
Change in pension liability adjustment, net of tax	2.5					2.5
Ending balance at Mar. 31, 2019	1,686.8	$ 1.4	2,351.7	(297.3)		(369)
Balance, shares at Mar. 31, 2019		140,675,332
Beginning balance at Dec. 31, 2018	1,615.5	$ 1.4	2,325.6	(335.6)	$ 27.1	(375.9)	$ (27.1)
Balance, shares at Dec. 31, 2018		139,453,710
Net income (loss)	80.2
Ending balance at Sep. 30, 2019	1,853.1	$ 1.4	2,428.3	(228.3)		(348.3)
Balance, shares at Sep. 30, 2019		143,835,394
Beginning balance at Mar. 31, 2019	1,686.8	$ 1.4	2,351.7	(297.3)		(369)
Balance, shares at Mar. 31, 2019		140,675,332
Net income (loss)	6.3			6.3
Issuance of common stock under share-based compensation plans	24		24
Issuance of common stock under share-based compensation plans, shares		1,266,734
Share-based compensation	9.6		9.6
Foreign currency translation	11.5					11.5
Change in unrealized gain (loss), net of tax	16.4					16.4
Change in pension liability adjustment, net of tax	2.5					2.5
Ending balance at Jun. 30, 2019	1,757.1	$ 1.4	2,385.3	(291)		(338.6)
Balance, shares at Jun. 30, 2019		141,942,066
Net income (loss)	62.7			62.7
Issuance of common stock under share-based compensation plans	32.6		32.6
Issuance of common stock under share-based compensation plans, shares		1,893,328
Share-based compensation	10.4		10.4
Foreign currency translation	(6.5)					(6.5)
Change in unrealized gain (loss), net of tax	(3.9)					(3.9)
Change in pension liability adjustment, net of tax	0.7					0.7
Ending balance at Sep. 30, 2019	1,853.1	$ 1.4	2,428.3	(228.3)		(348.3)
Balance, shares at Sep. 30, 2019		143,835,394
Beginning balance at Dec. 31, 2019	1,882.3	$ 1.4	2,449.1	(229.8)		(338.4)
Balance, shares at Dec. 31, 2019		144,386,618
Net income (loss)	8.6			8.6
Issuance of common stock under share-based compensation plans	11.4		11.4
Issuance of common stock under share-based compensation plans, shares		551,328
Share-based compensation	12.5		12.5
Foreign currency translation	(49.1)					(49.1)
Change in unrealized gain (loss), net of tax	17.4					17.4
Change in pension liability adjustment, net of tax	2.5					2.5
Ending balance at Mar. 31, 2020	1,885.6	$ 1.4	2,473	(221.2)		(367.6)
Balance, shares at Mar. 31, 2020		144,937,946
Beginning balance at Dec. 31, 2019	1,882.3	$ 1.4	2,449.1	(229.8)		(338.4)
Balance, shares at Dec. 31, 2019		144,386,618
Net income (loss)	13.3
Ending balance at Sep. 30, 2020	2,036.3	$ 1.5	2,565.5	(216.5)		(314.2)
Balance, shares at Sep. 30, 2020		147,647,117
Beginning balance at Mar. 31, 2020	1,885.6	$ 1.4	2,473	(221.2)		(367.6)
Balance, shares at Mar. 31, 2020		144,937,946
Net income (loss)	5.5			5.5
Issuance of common stock under share-based compensation plans	40.2	$ 0.1	40.1
Issuance of common stock under share-based compensation plans, shares		1,865,986
Share-based compensation	15.3		15.3
Foreign currency translation	21.6					21.6
Change in unrealized gain (loss), net of tax	15					15
Change in pension liability adjustment, net of tax	2.5					2.5
Ending balance at Jun. 30, 2020	1,985.7	$ 1.5	2,528.4	(215.7)		(328.5)
Balance, shares at Jun. 30, 2020		146,803,932
Net income (loss)	(0.8)			(0.8)
Issuance of common stock under share-based compensation plans	18.6		18.6
Issuance of common stock under share-based compensation plans, shares		843,185
Share-based compensation	18.5		18.5
Foreign currency translation	12.8					12.8
Change in unrealized gain (loss), net of tax	(0.7)					(0.7)
Change in pension liability adjustment, net of tax	2.2					2.2
Ending balance at Sep. 30, 2020	$ 2,036.3	$ 1.5	$ 2,565.5	$ (216.5)		$ (314.2)
Balance, shares at Sep. 30, 2020		147,647,117

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Statement Of Stockholders Equity [Abstract]
Change in unrealized gain (loss), tax	$ 0.5	$ 5.1	$ 6	$ 7	$ 0.9	$ 2.7
Change in pension liability adjustment, tax	$ 1.1	$ 0.8	$ 0.8	$ 1.8	$ 0	$ 0

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement Of Cash Flows [Abstract]
Net income	$ 13.3	$ 80.2
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income tax benefit		(75.9)
Depreciation and amortization	36.9	43.9
Amortization of debt issuance costs and debt discount	0.9	0.8
Net periodic pension and postretirement cost	2.5	3.9
Non-cash share-based compensation	46.3	26
Other	0.6	1.8
Changes in operating assets and liabilities excluding effects of acquisitions and divestitures:
Trade and other receivables	(2.5)	(10.6)
Prepaid expenses and other current assets	(8)	(10.1)
Accounts payable and other accrued expenses	(12)	(2.5)
Deferred revenue	0.6	2.6
Employee compensation and benefits	(2.8)	(18.5)
Accrued interest	0.3
Accrued taxes	(8.7)	(10.4)
Other assets and liabilities	(20.1)	(6.6)
Net cash provided by operating activities	47.3	24.6
Cash Flows from Investing Activities
Purchase of customer trust funds marketable securities	(25.3)	(335.1)
Proceeds from sale and maturity of customer trust funds marketable securities	304.1	278.1
Expenditures for property, plant, and equipment	(13.6)	(10.8)
Expenditures for software and technology	(30.6)	(27.6)
Acquisition costs, net of cash and restricted cash acquired	(58.3)	(29.4)
Net cash provided by (used in) investing activities	176.3	(124.8)
Cash Flows from Financing Activities
Decrease in customer trust funds obligations, net	(601.4)	(54.5)
Proceeds from issuance of common stock under share-based compensation plans	70.2	76.7
Repayment of long-term debt obligations	(7.9)	(5.1)
Proceeds from revolving credit facility	295
Net cash (used in) provided by financing activities	(244.1)	17.1
Effect of exchange rate changes on cash, restricted cash, and equivalents	(7.9)	7.2
Net decrease in cash, restricted cash, and equivalents	(28.4)	(75.9)
Cash, restricted cash, and equivalents at beginning of period	1,658.6	1,106.3
Cash, restricted cash, and equivalents at end of period	1,630.2	1,030.4
Reconciliation of cash, restricted cash, and equivalents to the condensed consolidated balance sheets
Cash and equivalents	554.6	270.9
Restricted cash and equivalents included in customer trust funds	$ 1,075.6	$ 759.5
Restricted Cash and Cash Equivalents, Current, Asset, Statement of Financial Position [Extensible List]	us-gaap:FundsHeldForClients	us-gaap:FundsHeldForClients
Cash, restricted cash, and equivalents at end of period	$ 1,630.2	$ 1,030.4

Organization

Organization	9 Months Ended
	Sep. 30, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization	1. Organization Ceridian HCM Holding Inc. and its subsidiaries (also referred to in this report as “Ceridian,” “we,” “our,” “us,” or the “Company”) offer a broad range of services and software designed to help employers more effectively manage employment processes, such as payroll, payroll-related tax filing, human resource information systems, employee self-service, time and labor management, employee assistance programs, and recruitment and applicant screening. Our technology-based services are typically provided through long-term customer relationships that result in a high level of recurring revenue. Our operations are primarily located in the United States (“U.S.”) and Canada. On August 28, 2020, we completed a secondary offering in which certain of our stockholders (the “Selling Stockholders”) sold 7,717,347 shares of our common stock in an underwritten public offering at a public offering price of $72.18 per share. All proceeds from the sale of this common stock went to the selling stockholders. During the three months ended September 30, 2020, we incurred $0.4 million of expenses related to the August 28, 2020, secondary offering. Expenses associated with our secondary offering are recorded within selling, general and administrative expense in our condensed consolidated statements of operations.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information. Accordingly, the unaudited condensed consolidated financial statements do not include all of the information and notes required by GAAP for complete financial statements. The accounting policies we follow are set forth in Note 2, “Summary of Significant Accounting Policies,” to our audited consolidated financial statements in our 2019 Form 10-K. The following notes should be read in conjunction with these policies and other disclosures in our 2019 Form 10-K. In the opinion of management, the unaudited condensed consolidated financial statements contained herein reflect all adjustments (consisting only of normal recurring adjustments, except as set forth in these notes to condensed consolidated financial statements) necessary to present fairly in all material aspects the financial position, results of operations, comprehensive income (loss), and cash flows from all periods presented. Interim results are not necessarily indicative of results for a full year. Internally Developed Software Costs In accordance with Accounting Standards Codification (“ASC”) Topic 350, we capitalize costs associated with software developed or obtained for internal use when both the preliminary project stage is completed and our management has authorized further funding for the project, which it deems probable of completion. Capitalized software costs include only: (1) external direct costs of materials and services consumed in developing or obtaining the software; (2) payroll and payroll-related costs for employees who are directly associated with and who devote time to the project; and (3) interest costs incurred while developing the software. Capitalization of these costs ceases no later than the point at which the project is substantially complete and ready for its intended purpose. We do not include general and administrative costs and overhead costs in capitalizable costs. Research and development costs, product management, and other software maintenance costs related to software development are expensed as incurred. Deferred Costs Deferred costs, which primarily consist of deferred sales commissions, included within Other assets on our condensed consolidated balance sheets were $118.8 million and $106.4 million as of September 30, 2020, and December 31, 2019, respectively. Amortization expense for the deferred costs was $9.8 million and $8.1 million for the three months ended September 30, 2020, and 2019, respectively, and $27.9 million and $23.5 million for the nine months ended September 30, 2020, and 2019 respectively. Recently Issued Accounting Pronouncements In August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2018-14, “Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans,” which modifies the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. This update removes disclosures that are no longer considered cost beneficial, adds disclosures identified as relevant, and clarifies certain specific requirements of disclosures to improve the effectiveness of disclosures in the notes to financial statements. The amendments in this update are effective for public business entities for fiscal years ending after December 15, 2020. The amendments in this update should be applied on a retrospective basis to all periods presented. T he adoption of this guidance will not have a significant impact on our annual defined benefit plan and other postretirement plan disclosures . In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform,” which provides guidance for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendments in this guidance apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The amendments in this guidance provide for an optional method in which modifications of contracts within the scope of ASC Topic 310, Receivables, and ASC Topic 470, Debt, should be accounted for by prospectively adjusting the effective interest rate, in addition to several other optional methods and exceptions. The amendments in this update are effective for all entities beginning March 12, 2020 and are available to be used through December 31, 2022. We do not expect the adoption of this guidance to have a significant impact on our financial statements.

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
Business Combinations	3. Business Combinations On May 29, 2020, we completed the purchase of 100% of the outstanding shares of Excelity Global Solutions Pte. Ltd. (“Excelity”) for $77.2 million. Excelity is a human capital management service provider in the Asia-Pacific region. The financial results of Excelity have been included within our condensed consolidated financial statements from the acquisition date forward and are classified as a Bureau solution. The acquisition of Excelity was recorded using the acquisition method of accounting, in which the assets and liabilities assumed are recognized at their fair value. As of September 30, 2020, we have conducted a preliminary assessment of certain assets and liabilities related to the acquisition of Excelity. We are continuing our review of these items during the measurement period, and if new information is obtained about facts and circumstances that existed at the effective date of the acquisition, the acquisition accounting will be revised to reflect the resulting adjustments to the current estimate of these items. After consideration of the Excelity acquisition, management has concluded that we continue to have one operating and reportable segment. This conclusion aligns with how management monitors operating performance, allocates resources, and deploys capital. The major classes of assets and liabilities to which we allocated the purchase price were as follows: (Dollars in millions) Cash and equivalents $ 6.6 Trade receivables, prepaid expenses, and other current assets 10.8 Customer trust funds 12.3 Property, plant, and equipment and other assets 4.2 Goodwill 47.6 Other intangible assets, net 20.7 Accounts payable and other current liabilities (2.2 ) Customer trust funds obligations (13.1 ) Other non-current liabilities (9.7 ) Total purchase price $ 77.2

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	4. Fair Value Measurements Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis Our financial assets and liabilities measured at fair value on a recurring basis were categorized as follows: September 30, 2020 Level 1 Level 2 Level 3 Total (Dollars in millions) Assets Available for sale customer trust funds assets $ — $ 1,571.0 (a) $ — $ 1,571.0 Total assets measured at fair value $ — $ 1,571.0 $ — $ 1,571.0 December 31, 2019 Level 1 Level 2 Level 3 Total (Dollars in millions) Assets Available for sale customer trust funds assets $ - $ 1,826.8 (a) $ - $ 1,826.8 Total assets measured at fair value $ - $ 1,826.8 $ - $ 1,826.8 (a) Fair value is based on inputs that are observable for the asset or liability, other than quoted prices. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis During the nine months ended September 30, 2020, and the year ended December 31, 2019, we completed business combinations which required the assets acquired and liabilities assumed to be measured at fair value on a nonrecurring basis. Please refer to Note 3, “Business Combinations,” for additional information.

Customer Trust Funds

Customer Trust Funds	9 Months Ended
	Sep. 30, 2020
Investments Debt And Equity Securities [Abstract]
Customer Trust Funds	5. Customer Trust Funds Investment income from invested customer trust funds, also referred to as float revenue or float, is a component of our compensation for providing services under agreements with our customers. Investment income from invested customer trust funds included in recurring services revenue was $10.6 million and $18.3 million for the three months ended September 30, 2020, and 2019, respectively, and $41.7 million and $62.9 million for the nine months ended September 30, 2020, and 2019, respectively. The amortized cost of customer trust funds as of September 30, 2020, and December 31, 2019, is the original cost of assets acquired. The amortized cost and fair values of investments of customer trust funds available for sale were as follows: September 30, 2020 Amortized Gross Unrealized Fair Cost Gain Loss Value (Dollars in millions) Money market securities, investments carried at cost and other cash equivalents $ 1,050.6 $ — $ — $ 1,050.6 Available for sale investments: U.S. government and agency securities 441.9 23.6 — 465.5 Canadian and provincial government securities 379.8 16.1 — 395.9 Corporate debt securities 466.1 19.8 (0.1 ) 485.8 Asset-backed securities 201.2 5.4 — 206.6 Mortgage-backed securities 12.5 0.2 — 12.7 Other securities 4.5 — — 4.5 Total available for sale investments 1,506.0 65.1 (0.1 ) 1,571.0 Invested customer trust funds 2,556.6 $ 65.1 $ (0.1 ) 2,621.6 Trust receivables 24.6 25.0 Total customer trust funds $ 2,581.2 $ 2,646.6 December 31, 2019 Amortized Gross Unrealized Fair Cost Gain Loss Value (Dollars in millions) Money market securities, investments carried at cost and other cash equivalents $ 1,348.1 $ — $ — $ 1,348.1 Available for sale investments: U.S. government and agency securities 542.4 7.1 (0.3 ) 549.2 Canadian and provincial government securities 406.7 5.4 (0.7 ) 411.4 Corporate debt securities 562.2 9.0 (0.3 ) 570.9 Asset-backed securities 270.0 1.7 (0.3 ) 271.4 Mortgage-backed securities 19.8 0.2 (0.1 ) 19.9 Other securities 4.0 — — 4.0 Total available for sale investments 1,805.1 23.4 (1.7 ) 1,826.8 Invested customer trust funds 3,153.2 $ 23.4 $ (1.7 ) 3,174.9 Trust receivables (a) 40.4 29.2 Total customer trust funds $ 3,193.6 $ 3,204.1 (a) The fair value of trust receivables as of December 31, 2019, included a loss of $11.2 million related to unrecovered duplicate payments resulting from an isolated service incident on September 26, 2019. Ceridian was liable for these unrecovered duplicate payments and had reimbursed the customer trust for the resulting losses as of March 31, 2020. Please refer to Note 14, “Commitments and Contingencies,” for further discussion of the September 26, 2019, isolated service incident. The following represents the gross unrealized losses and the related fair value of the investments of customer trust funds available for sale, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position. September 30, 2020 Less than 12 months 12 months or more Total Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value (Dollars in millions) Corporate debt securities $ — $ — $ (0.1 ) $ 5.8 $ (0.1 ) $ 5.8 Total available for sale investments $ — $ — $ (0.1 ) $ 5.8 $ (0.1 ) $ 5.8 Management does not believe that any individual unrealized loss was unrecoverable as of September 30, 2020. The unrealized losses are primarily attributable to changes in interest rates and not to credit deterioration. We currently do not intend to sell or expect to be required to sell the securities before the time required to recover the amortized cost. The amortized cost and fair value of investment securities available for sale at September 30, 2020, by contractual maturity are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or to prepay obligations with or without call or prepayment penalties. September 30, 2020 Cost Fair Value (Dollars in millions) Due in one year or less $ 1,398.7 $ 1,402.0 Due in one to three years 689.9 719.2 Due in three to five years 343.5 362.2 Due after five years 124.5 138.2 Invested customer trust funds $ 2,556.6 $ 2,621.6

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	6. Goodwill and Intangible Assets Goodwill Goodwill and changes therein were as follows: (Dollars in millions) Balance at December 31, 2018 $ 1,927.4 Acquisitions 25.7 Translation 20.4 Balance at December 31, 2019 1,973.5 Acquisition 47.6 Translation (9.8 ) Balance at September 30, 2020 $ 2,011.3 Please refer to Note 3, “Business Combinations,” for further discussion of the Excelity acquisition. Intangible Assets Other intangible assets consisted of the following: September 30, 2020 Gross Carrying Amount Accumulated Amortization Net Estimated Life Range (Years) (Dollars in millions) Customer lists and relationships $ 225.9 $ (207.5 ) $ 18.4 5-15 Trade name 177.4 (2.0 ) 175.4 3 and Indefinite Technology 157.3 (153.8 ) 3.5 3-4 Total other intangible assets $ 560.6 $ (363.3 ) $ 197.3 December 31, 2019 Gross Carrying Amount Accumulated Amortization Net Estimated Life Range (Years) (Dollars in millions) Customer lists and relationships $ 212.5 $ (208.2 ) $ 4.3 5-15 Trade name 174.0 (2.1 ) 171.9 3 and Indefinite Technology 156.1 (154.4 ) 1.7 3-4 Total other intangible assets $ 542.6 $ (364.7 ) $ 177.9 We perform an impairment assessment of our trade name intangible assets as of October 1 of each year. We continue to evaluate the use of our trade names and branding in our sales and marketing efforts. If there is a fundamental shift in the method of our branding in the future, we will assess the impact on the carrying amount of our trade name intangible assets and determine whether an impairment exists. If it is determined that an impairment has occurred, it would be recognized during the period in which the decision was made to make the fundamental shift. Amortization expense related to definite-lived intangible assets was $0.8 million and $4.7 million for the three months ended September 30, 2020, and 2019, respectively, and $1.6 million and $13.9 million for the nine months ended September 30, 2020, and 2019, respectively.

Debt

Debt	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Debt	7. Debt Overview Our debt obligations consisted of the following as of the periods presented: September 30, December 31, 2020 2019 (Dollars in millions) Term Debt, interest rate of 2.6% and 4.8%, respectively $ 666.4 $ 671.5 Revolving Credit Facility ($300.0 million available capacity less amounts reserved for letters of credit, which were $0.7 million and $1.9 million, respectively) 295.0 — Canada Line of Credit (CDN $7.0 million letter of credit capacity, which was fully utilized; USD $5.3 million and USD $5.4 million, respectively) — — Financing lease liabilities (Please refer to Note 13) 9.4 12.4 Total debt 970.8 683.9 Less unamortized discount on Term Debt 1.2 1.4 Less unamortized debt issuance costs on Term Debt 4.7 5.4 Less current portion of long-term debt 7.7 10.8 Long-term debt, less current portion $ 957.2 $ 666.3 Senior Secured Credit Facility On April 30, 2018, Ceridian completed the refinancing of its debt by entering into a new credit agreement. Pursuant to the terms of the new credit agreement, Ceridian became borrower of (i) a $680.0 million term loan debt facility (the “2018 Term Debt”) and (ii) a $300.0 million revolving credit facility (the “2018 Revolving Credit Facility”) (the 2018 Term Debt and the 2018 Revolving Credit Facility are together referred to as the “2018 Senior Secured Credit Facility”). The 2018 Senior Secured Credit Facility is secured by substantially all assets of Ceridian. The 2018 Term Debt has a maturity date of April 30, 2025, and the 2018 Revolving Credit Facility has a maturity date of April 30, 2023. The 2018 Term Debt was initially subject to an interest rate of LIBOR plus 3.25%. As a result of a ratings upgrade on March 26, 2019, of our senior secured credit facilities by Moody’s Investors Service, from B3 to B2, the Company’s floating rate term debt interest rate has been reduced from LIBOR plus 3.25% to LIBOR plus 3.00%, so long as the rating is maintained. On April 2, 2020, in light of the uncertainty and volatility in the global financial markets resulting from the COVID-19 pandemic, Ceridian elected to borrow $295.0 million under the 2018 Revolving Credit Facility as a precautionary measure to increase our cash position and to preserve financial flexibility. Future Payments and Maturities of Debt The future principal payments and maturities of our indebtedness, excluding financing lease obligations, are as follows: Years Ending December 31, Amount (Dollars in millions) 2020 $ 1.7 2021 6.8 2022 6.8 2023 301.8 2024 6.8 Thereafter 637.5 $ 961.4 Fair Value of Debt Our debt does not trade in active markets. Based on the borrowing rates currently available to us for bank loans with similar terms and average maturities and the limited trades of our debt, the fair value of our debt was estimated to be $927.8 million and $675.1 million as of September 30, 2020, and December 31, 2019, respectively.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2020
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plans	8. Employee Benefit Plans The components of net periodic cost for our defined benefit pension plan and for our postretirement benefit plan are included in the following tables: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Net Periodic Pension Cost (Dollars in millions) Interest cost $ 3.2 $ 4.5 $ 9.6 $ 13.6 Actuarial loss amortization 3.9 3.2 11.7 9.6 Less: Expected return on plan assets (5.7 ) (5.9 ) (17.1 ) (17.7 ) Net periodic pension cost $ 1.4 $ 1.8 $ 4.2 $ 5.5 Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Net Periodic Postretirement Benefit (Dollars in millions) Interest cost $ 0.1 $ 0.2 $ 0.4 $ 0.4 Actuarial gain amortization (0.6 ) (0.6 ) (1.8 ) (1.8 ) Prior service credit amortization (0.1 ) (0.1 ) (0.3 ) (0.2 ) Net periodic postretirement benefit gain $ (0.6 ) $ (0.5 ) $ (1.7 ) $ (1.6 ) In October 2020, we contributed $105.0 million to the U.S. pension plan, which represented $17.0 million of required minimum contributions and $88.0 million of voluntary contributions.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-Based Compensation	9. Share-Based Compensation Our share-based compensation consists of performance-based stock options, term-based stock options, restricted stock units (“RSUs”), and performance stock units (“PSUs”). We also offer an employee stock purchase plan. Prior to November 1, 2013, Ceridian employees participated in a share-based compensation plan of the former ultimate parent of Ceridian, the 2007 Stock Incentive Plan (“2007 SIP”). Effective November 1, 2013, although most participants who held stock options under the 2007 SIP converted their options to a newly created option plan, the 2013 Ceridian HCM Holding Inc. Stock Incentive Plan, as amended (“2013 SIP”), a small number of participants maintained their stock options in the 2007 SIP. Concurrent with the initial public offering (“IPO”) and legal reorganization, all outstanding stock options under the 2007 SIP were converted into options to purchase common stock of Ceridian. As of September 30, 2020, there were 2,500 stock options outstanding under the 2007 SIP. Stock options awarded under the 2013 SIP vest either annually on a pro rata basis over a four- or five-year On April 24, 2018, in connection with the IPO, the Board of Directors approved the Ceridian HCM Holding Inc. 2018 Equity Incentive Plan (“2018 EIP”), which authorizes the issuance of up to 13,500,000 shares of common stock to eligible participants through equity awards (the “Share Reserve”). The Share Reserve may be increased on March 31 of each of the first ten calendar years during the term of the 2018 EIP, by the lesser of (i) three percent of the number of shares of our common stock outstanding on each January 31 immediately prior to the date of increase or (ii) such number of shares of our common stock determined by the Board of Directors. Effective on March 31, 2020, the Share Reserve was increased by 4,199,089 shares, pursuant to the terms of the 2018 EIP. Equity awards under the 2018 EIP vest either annually or quarterly on a pro rata basis, generally over a one-, three-, or four-year Total share-based compensation expense was $18.5 million and $10.4 million for the three months ended September 30, 2020, and 2019, respectively, and $46.3 million and $26.0 million for the nine months ended September 30, 2020, and 2019, respectively. Performance-Based Stock Options Performance-based stock option activity under the 2007 SIP, the 2013 SIP, and the 2018 EIP was as follows: Shares Weighted Average Exercise Price (per share) Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in millions) Performance-based options outstanding at December 31, 2019 68,281 $ 13.58 2.6 $ 3.7 Granted 1,818,728 65.27 — — Exercised (31,678 ) (13.46 ) — — Forfeited or expired — — — — Performance-based options outstanding at September 30, 2020 1,855,331 $ 64.25 9.5 $ 34.1 Performance-based options exercisable at September 30, 2020 36,603 $ 13.68 2.1 $ 2.5 The performance criteria for all outstanding performance-based stock options under the 2007 SIP and the 2013 SIP was met on June 7, 2018, resulting in the vesting of all outstanding performance-based stock options under the 2007 SIP and the 2013 SIP on this date. During the nine months ended September 30, 2020, 1,500,000 performance-based stock options (“Performance Option Award”) were granted under the 2018 EIP with an exercise price of $65.26. The vesting conditions for the Performance Option Award are based on the Company’s performance on the New York Stock Exchange (“NYSE”) with 750,000 shares available to vest when the Company’s per share closing price on the NYSE meets or exceeds $110.94, or 1.7 times the exercise price, for ten consecutive trading days, and the remaining 750,000 shares are available to vest when the Company’s per share closing price on the NYSE meets or exceeds $130.52, or 2.0 times the exercise price, for ten consecutive trading days. The Performance Option Award has a minimum time-based vesting period of 3 years. The vesting conditions must be achieved prior to May 8, 2025, or any unvested portion of the Performance Option Award will terminate. A Monte Carlo simulation model was used to determine the fair value of these performance-based stock options. The Monte Carlo model utilizes multiple input variables that determine the probability of satisfying the market conditions stipulated in the award. We have estimated an expected term of 5.3 years, based on the vesting period and contractual term. The remaining performance-based stock options granted during the nine months ended September 30, 2020, under the 2018 EIP primarily include vesting conditions based on migrations of customers to Dayforce. There are two tranches of stock options, in which the vesting conditions must be met either prior to September 13, 2021, or September 13, 2022. As of September 30, 2020 , which is expected to be recognized over a weighted average period of 2.5 years. Term-Based Stock Options Term-based stock option activity under the 2007 SIP, the 2013 SIP, and the 2018 EIP, for the period was as follows: Shares Weighted Average Exercise Price (per share) Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in millions) Term-based options outstanding at December 31, 2019 13,144,937 $ 29.74 7.8 $ 501.3 Granted 2,262,708 65.82 — — Exercised (3,033,856 ) (20.23 ) — — Forfeited or expired (500,715 ) (28.60 ) — — Term-based options outstanding at September 30, 2020 11,873,074 $ 39.09 8.0 $ 517.2 Term-based options exercisable at September 30, 2020 3,681,857 $ 26.98 7.0 $ 205.0 As of September 30, 2020, there was $95.9 million of share-based compensation expense related to unvested term-based stock options not yet recognized, which is expected to be recognized over a weighted average period of 1.9 years. Restricted Stock Units RSU activity under the 2013 SIP and the 2018 EIP, for the period was as follows: Shares RSUs outstanding at December 31, 2019 819,818 Granted 629,554 Shares issued upon vesting of RSUs (63,144 ) Forfeited or canceled (17,109 ) RSUs outstanding at September 30, 2020 1,369,119 RSUs releasable at September 30, 2020 422,635 During the nine months ended September 30, 2020, 215,441 RSUs vested. As of September 30, 2020, there were 946,484 unvested RSUs outstanding and 422,635 vested RSUs outstanding. RSUs generally vest annually over a one-, three-, or four-year Performance Stock Units During the nine months ended September 30, 2020, 145,017 PSUs were granted under the 2018 EIP and 3,464 PSUs were forfeited and cancelled. The vesting conditions for the PSUs are based on the Company’s performance against Cloud revenue and adjusted EBITDA margin goals under the Company’s 2020 Management Incentive Plan (the “2020 MIP”) for the incentive period of January 1, 2020 through December 31, 2020. The maximum incentive vesting of PSUs may not exceed 125% under the 2020 MIP. Both the Cloud revenue and adjusted EBITDA margin goals are calculated based on the Company’s operating results, adjusted for foreign currency and interest rate impacts plus other unique impacts as approved by the Compensation Committee or the Board of Directors. Upon vesting of a PSU, a participant will receive shares of common stock of the Company. The probability of vesting of PSUs will continue to be evaluated throughout the period, and share-based compensation expense will be recognized in accordance with that probability. As of , there was $10.0 million of share-based compensation expense related to unvested PSUs not yet recognized. Global Employee Stock Purchase Plan On November 9, 2018, the Board of Directors approved the Ceridian HCM Holding Inc. Global Employee Stock Purchase Plan (“GESPP”), and the Company’s stockholders approved the GESPP on May 1, 2019. The GESPP authorizes the issuance of up to 2,500,000 shares of common stock to eligible participants through purchases via payroll deductions. A total of 2,102,709 shares of common stock are available for future issuances under the plan at September 30, 2020. The purchase price is the lower of (i) 85% of the fair market value of a share of common stock on the offering date (the first trading day of the offering period commencing on January 1 and concluding on December 31) or (ii) 85% of the fair market value of a share of common stock on the purchase date. The GESPP shall continue for ten years, unless terminated sooner as provided under the GESPP. During 2020 and subsequent years, quarterly purchase periods commence on January 1, April 1, July 1, and October 1. Shares are purchased on the last trading day of the respective purchase periods. Our GESPP activity was as follows: Period Ended Shares Issued Purchase Price (per share) March 31, 2020 49,802 $ 42.56 June 30, 2020 42,706 59.52 September 30, 2020 42,719 59.52

Revenue

Revenue	9 Months Ended
	Sep. 30, 2020
Revenue From Contract With Customer [Abstract]
Revenue	10. Revenue Our Solutions We categorize our solutions into two categories: Cloud and Bureau offerings. • Cloud revenue is generated from solutions that are delivered via two cloud offerings, Dayforce and Powerpay. The Dayforce offering is differentiated from our market competition as being a single application with continuous calculation that offers a comprehensive range of functionality, including global human resource, payroll, benefits, workforce management, and talent management on web and native iOS and Android platforms. Dayforce recurring revenue is primarily generated from monthly recurring fees charged on a per-employee, per-month (“PEPM”) basis and the allocation of investment income generated from holding Dayforce customer funds in trust before funds are remitted to taxing authorities, Dayforce customer employees, or other third parties. Dayforce professional services and other revenue is primarily generated from implementation and post go-live professional services revenue. Other sources of Dayforce revenues include revenue from the sale, rental and maintenance of time clocks; revenue from the sale of third-party services; and billable travel expenses for Dayforce customers. The Powerpay offering is our solution designed primarily for small market Canadian customers, which typically have fewer than 20 employees. Powerpay recurring revenue is primarily generated from recurring fees charged on a per-employee, per-process basis and the allocation of investment income generated from holding Powerpay customer funds in trust before funds are remitted to taxing authorities, Powerpay customer employees, or other third parties. Typical processes include the customer’s payroll runs, year-end tax packages, and delivery of customers’ remittance advices or checks. Powerpay professional services revenue is primarily generated from the setup of the Powerpay customer on their platform. • Bureau revenue is generated primarily from solutions delivered via a service-bureau model. These solutions are delivered via three primary service lines: payroll, payroll-related tax filing services, and outsourced human resource solutions. Revenue from payroll services is generated from recurring fees charged on a per-process basis. Typical processes include the customer’s payroll runs, year-end tax packages, and delivery of customers’ remittance advices or checks. In addition to customers who use our payroll services, certain customers use our tax filing services on a stand-alone basis. Our outsourced human resource solutions are tailored to meet the needs of individual customers, and entail our contracting to perform many of the duties of a customer’s human resources department, including payroll processing, time and labor management, performance management, and recruiting. We also perform individual services for customers, such as check printing, wage attachment and disbursement, and Affordable Care Act (“ACA”) management. Additional items included in Bureau revenue are fees for custom professional services to Bureau customers; the allocation of investment income generated from holding Bureau customer funds in trust before funds are remitted to taxing authorities, Bureau customer employees, or other third parties; consulting services related to Bureau offerings; revenue from the sale of third party services to Bureau customers; and Excelity revenue. Disaggregation of Revenue Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in millions) Revenue: Cloud Dayforce Recurring services $ 122.7 $ 109.4 $ 369.3 $ 314.7 Professional services and other 35.1 34.3 108.8 96.3 Total Dayforce revenue 157.8 143.7 478.1 411.0 Powerpay Recurring services 18.6 21.6 56.6 64.0 Professional services and other 0.3 0.2 0.8 0.8 Total Powerpay revenue 18.9 21.8 57.4 64.8 Total Cloud revenue 176.7 165.5 535.5 475.8 Bureau Recurring services 26.8 36.4 82.8 125.0 Professional services and other 0.9 0.4 1.4 1.5 Total Bureau revenue 27.7 36.8 84.2 126.5 Total revenue $ 204.4 $ 202.3 $ 619.7 $ 602.3 Recurring services revenue includes float revenue of $10.6 million and $18.3 million for the three months ended September 30, 2020, and 2019, respectively, and $41.7 million and $62.9 million for the nine months ended September 30, 2020, and 2019, respectively. Contract Balances The Company records a contract asset when revenue recognized for professional service performance obligations exceed the contractual amount of billings for implementation related professional services. Contract assets were $53.4 million and $43.2 million as of September 30, 2020, and December 31, 2019, respectively. Contract assets expected to be recognized in revenue within twelve months are included within Prepaid expenses and other current assets, with the remaining contract assets included within Other assets on our condensed consolidated balance sheets. Deferred Revenue Deferred revenue primarily consists of payments received in advance of revenue recognition. The changes in deferred revenue were as follows: Nine Months Ended September 30, 2020 2019 (Dollars in millions) Deferred revenue, beginning of period $ 25.5 $ 23.2 New billings 313.2 262.0 Revenue recognized (312.4 ) (258.0 ) Effect of exchange rate (0.2 ) — Deferred revenue, end of period $ 26.1 $ 27.2 Transaction Price for Remaining Performance Obligation s In accordance with ASC Topic 606, the following represents the aggregate amount of transaction price allocated to the remaining performance obligations that are unsatisfied as of the end of the reporting period. As of September 30, 2020, approximately $926.1 million of revenue is expected to be recognized over the next three years from remaining performance obligations, which represents contracted revenue for recurring services and fixed price professional services, primarily implementation services, that has not yet been recognized, including deferred revenue and unbilled amounts that will be recognized as revenue in future periods. In accordance with the practical expedient provided in ASC Topic 606, performance obligations that are billed and recognized as they are delivered, primarily professional services contracts that are on a time and materials basis, are excluded from the transaction price for remaining performance obligations disclosed above.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Accumulated Other Comprehensive Loss	11. Accumulated Other Comprehensive Loss The components of accumulated other comprehensive loss were as follows: Foreign Currency Translation Adjustment Unrealized Gain (Loss) from Invested Customer Trust Funds Pension Liability Adjustment Total (Dollars in millions) Balance as of December 31, 2019 $ (178.4 ) $ 10.2 $ (170.2 ) $ (338.4 ) Other comprehensive income (loss) before income taxes and reclassifications (14.7 ) 43.3 — 28.6 Income tax expense — (11.6 ) (2.7 ) (14.3 ) Reclassifications to earnings — — 9.9 9.9 Other comprehensive (loss) income (14.7 ) 31.7 7.2 24.2 Balance as of September 30, 2020 $ (193.1 ) $ 41.9 $ (163.0 ) $ (314.2 )

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	12. Income Taxes Our income tax provision represents federal, state, and international taxes on our income recognized for financial statement purposes and includes the effects of temporary differences between financial statement income and income recognized for tax return purposes. Deferred tax assets and liabilities are recorded for temporary differences between the financial reporting basis and the tax basis of assets and liabilities as adjusted for the expected benefits of utilizing net operating loss carryforwards. We record a valuation allowance to reduce our deferred tax assets to reflect the net deferred tax assets that we believe will be realized. In assessing the likelihood that we will be able to recover our deferred tax assets and the need for a valuation allowance, we consider all available evidence, both positive and negative, including historical levels of pre-tax book income, expiration of net operating losses, expectations and risks associated with estimates of future taxable income, and ongoing prudent and feasible tax planning strategies, as well as current tax laws. We recorded an income tax benefit of $5.7 million during the nine months ended September 30, 2020, primarily attributable to tax benefits of $6.8 million for a reduction in the base erosion anti-abuse (“BEAT”) in the U.S., $2.8 million associated with share-based compensation, and a $2.3 million reduction associated with unremitted foreign earnings, partially offset by tax expense of $6.2 million, primarily attributable to $4.8 million in U.S. state taxes. The total amount of unrecognized tax benefits as of September 30, 2020, and December 31, 2019, were $1.8 million, including $0.3 million of accrued interest, and $1.5 million, including $0.2 million of accrued interest, respectively. Of the total amount of unrecognized tax benefits as of September 30, 2020, $1.8 million represents the amount that, if recognized, would favorably impact our effective income tax rate. It is reasonable to expect that the amount of unrecognized tax benefits will change in the next twelve months; however, we do not expect the change to have a significant impact on our results of operations or financial condition. We file income tax returns in the U.S. federal jurisdiction, various states, and foreign jurisdictions. With a few exceptions, we are no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities for years before 2015.

Leases

Leases	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Leases	13. Leases Supplemental balance sheet information related to leases was as follows: Lease Type Balance Sheet Classification September 30, 2020 December 31, 2019 (Dollars in millions) ASSETS Operating lease assets Trade and other receivables, net $ 5.4 $ 5.5 Operating lease assets Prepaid expenses and other current assets 2.2 1.2 Operating lease assets Right of use lease asset 37.5 32.0 Financing lease assets Property, plant, and equipment, net 8.2 8.8 Total lease assets $ 53.3 $ 47.5 LIABILITIES Current Financing lease liabilities Current portion of long-term debt $ 0.9 $ 4.0 Operating lease liabilities Current portion of long-term lease liabilities 10.3 8.8 Noncurrent Financing lease liabilities Long-term debt, less current portion 8.5 8.4 Operating lease liabilities Long-term lease liabilities, less current portion 34.1 30.1 Total lease liabilities $ 53.8 $ 51.3 The components of lease expense were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Lease Cost (Dollars in millions) Operating lease cost $ 2.4 $ 4.2 $ 7.0 $ 12.6 Financing lease cost: Depreciation of lease assets 0.2 — 0.6 — Interest on lease liabilities 0.1 — 0.3 — Sublease income (1.1 ) (1.0 ) (3.2 ) (3.3 ) Total lease cost, net $ 1.6 $ 3.2 $ 4.7 $ 9.3

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2020
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	14. Commitments and Contingencies Legal Matters We are subject to claims and a number of judicial and administrative proceedings considered normal in the course of our current and past operations, including employment-related disputes, contract disputes, disputes with our competitors, intellectual property disputes, government audits and proceedings, customer disputes, and tort claims. In some proceedings, the claimant seeks damages as well as other relief, which, if granted, would require substantial expenditures on our part. Our general terms and conditions in customer contracts frequently include a provision indicating that we will indemnify and hold our customers harmless from and against any and all claims alleging that the services and materials furnished by us violate any third party’s patent, trade secret, copyright or other intellectual property right. We are not aware of any material pending litigation concerning these indemnifications. Some of these matters raise difficult and complex factual and legal issues and are subject to many uncertainties, including the facts and circumstances of each particular action, and the jurisdiction, forum, and law under which each action is proceeding. Because of these complexities, final disposition of some of these proceedings may not occur for several years. As such, we are not always able to estimate the amount of our possible future liabilities, if any. There can be no certainty that we may not ultimately incur charges in excess of presently established or future financial accruals or insurance coverage. Although occasional adverse decisions or settlements may occur, it is management’s opinion that the final disposition of these proceedings will not, considering the merits of the claims and available resources or reserves and insurance, and based upon the facts and circumstances currently known, have a material adverse effect on our financial position or results of operations. Unrecover ed Duplicate Payments We identified an isolated service incident on September 26, 2019, that resulted in duplicate payments for certain of our U.S. payroll customers totaling $18.8 million. During the year ended December 31, 2019, we recorded a loss of $11.2 million for the amount unrecovered, within selling, general, and administrative expense in our consolidated statement of operations. Our recovery efforts continued through the second quarter of 2020, resulting in collections of $0.4 million during the nine months ended September 30, 2020, which was recognized as a reduction to selling, general, and administrative expense. We are no longer pursuing collection efforts of the remaining amount unrecovered.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2020
Related Party Transactions [Abstract]
Related Party Transactions	15. Related Party Transactions We provide services to FleetCor Technologies Inc. (“FleetCor Technologies”) a related party due to a shared board member, through certain commercial arrangements entered into in the ordinary course of business, which include provision of Dayforce services and other administrative services. For these services, we have recorded revenue of $0.2 million for the three months ended September 30, 2020, and 2019, respectively, and $0.7 million and $0.6 million for the nine months ended September 30, 2020, and 2019 respectively. We are party to a service agreement with The Dun and Bradstreet Corporation (“Dun and Bradstreet”), a related party due to certain shared board members. Pursuant to the service agreement, we made payments to Dun and Bradstreet totaling $0.4 million for the nine months ended September 30, 2020. We provide Dayforce and related services to The Stronach Group, for which we recorded revenue We provide payroll-related tax filings services to Fidelity National Financial, Inc., a related party until August 2019 due to certain shared board members, for which we recorded revenue of We provide Dayforce and related services to certain investment portfolio companies of THL Managers VI, LLC and Cannae Holdings, Inc., which are considered related parties due to certain shared board members. Revenue from these related parties was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in millions) American Blue Ribbon Holdings, LLC $ 0.4 $ 0.5 $ 1.2 $ 1.4 Essex Technology Group, LLC 0.1 0.2 0.4 0.4 Guaranteed Rate, Inc. 0.3 0.2 0.6 0.7 HighTower Advisors 0.1 0.1 0.1 0.1 Ten-X, LLC 0.1 0.1 0.2 0.3 Philips Feed Services 0.1 0.1 0.2 0.2

Net Income (Loss) per Share

Net Income (Loss) per Share	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Net Income (Loss) per Share	16. Net Income (Loss) per Share We compute net income (loss) per share of common stock using the treasury stock method. The basic and diluted net income (loss) per share computations were calculated as follows: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in millions, except share and per share data) Numerator: Net (loss) income $ (0.8 ) $ 62.7 $ 13.3 $ 80.2 Denominator: Weighted-average shares outstanding - basic 147,141,403 142,780,819 145,798,169 141,369,339 Effect of dilutive equity instruments — 6,372,408 6,307,550 6,910,604 Weighted-average shares outstanding - diluted 147,141,403 149,153,227 152,105,719 148,279,943 Net (loss) income per share - basic $ (0.01 ) $ 0.44 $ 0.09 $ 0.57 Net (loss) income per share - diluted $ (0.01 ) $ 0.42 $ 0.09 $ 0.54 The following potentially dilutive weighted-average shares were excluded from the calculation of diluted net income (loss) per share because their effect would have been anti-dilutive: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Performance-based stock options — — — — Term-based stock options 7,430,543 4,185,519 1,213,832 3,099,587 Restricted stock units 767,683 11,957 15,502 12,821 Performance stock units 385,240 — — —

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information. Accordingly, the unaudited condensed consolidated financial statements do not include all of the information and notes required by GAAP for complete financial statements. The accounting policies we follow are set forth in Note 2, “Summary of Significant Accounting Policies,” to our audited consolidated financial statements in our 2019 Form 10-K. The following notes should be read in conjunction with these policies and other disclosures in our 2019 Form 10-K. In the opinion of management, the unaudited condensed consolidated financial statements contained herein reflect all adjustments (consisting only of normal recurring adjustments, except as set forth in these notes to condensed consolidated financial statements) necessary to present fairly in all material aspects the financial position, results of operations, comprehensive income (loss), and cash flows from all periods presented. Interim results are not necessarily indicative of results for a full year.
Internally Developed Software Costs	Internally Developed Software Costs In accordance with Accounting Standards Codification (“ASC”) Topic 350, we capitalize costs associated with software developed or obtained for internal use when both the preliminary project stage is completed and our management has authorized further funding for the project, which it deems probable of completion. Capitalized software costs include only: (1) external direct costs of materials and services consumed in developing or obtaining the software; (2) payroll and payroll-related costs for employees who are directly associated with and who devote time to the project; and (3) interest costs incurred while developing the software. Capitalization of these costs ceases no later than the point at which the project is substantially complete and ready for its intended purpose. We do not include general and administrative costs and overhead costs in capitalizable costs. Research and development costs, product management, and other software maintenance costs related to software development are expensed as incurred.
Deferred Costs	Deferred Costs Deferred costs, which primarily consist of deferred sales commissions, included within Other assets on our condensed consolidated balance sheets were $118.8 million and $106.4 million as of September 30, 2020, and December 31, 2019, respectively. Amortization expense for the deferred costs was $9.8 million and $8.1 million for the three months ended September 30, 2020, and 2019, respectively, and $27.9 million and $23.5 million for the nine months ended September 30, 2020, and 2019 respectively.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2018-14, “Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans,” which modifies the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. This update removes disclosures that are no longer considered cost beneficial, adds disclosures identified as relevant, and clarifies certain specific requirements of disclosures to improve the effectiveness of disclosures in the notes to financial statements. The amendments in this update are effective for public business entities for fiscal years ending after December 15, 2020. The amendments in this update should be applied on a retrospective basis to all periods presented. T he adoption of this guidance will not have a significant impact on our annual defined benefit plan and other postretirement plan disclosures . In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform,” which provides guidance for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendments in this guidance apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The amendments in this guidance provide for an optional method in which modifications of contracts within the scope of ASC Topic 310, Receivables, and ASC Topic 470, Debt, should be accounted for by prospectively adjusting the effective interest rate, in addition to several other optional methods and exceptions. The amendments in this update are effective for all entities beginning March 12, 2020 and are available to be used through December 31, 2022. We do not expect the adoption of this guidance to have a significant impact on our financial statements.

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
Schedule of Major Classes of Assets and Liabilities Allocated to Purchase Price	The major classes of assets and liabilities to which we allocated the purchase price were as follows: (Dollars in millions) Cash and equivalents $ 6.6 Trade receivables, prepaid expenses, and other current assets 10.8 Customer trust funds 12.3 Property, plant, and equipment and other assets 4.2 Goodwill 47.6 Other intangible assets, net 20.7 Accounts payable and other current liabilities (2.2 ) Customer trust funds obligations (13.1 ) Other non-current liabilities (9.7 ) Total purchase price $ 77.2

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	Our financial assets and liabilities measured at fair value on a recurring basis were categorized as follows: September 30, 2020 Level 1 Level 2 Level 3 Total (Dollars in millions) Assets Available for sale customer trust funds assets $ — $ 1,571.0 (a) $ — $ 1,571.0 Total assets measured at fair value $ — $ 1,571.0 $ — $ 1,571.0 December 31, 2019 Level 1 Level 2 Level 3 Total (Dollars in millions) Assets Available for sale customer trust funds assets $ - $ 1,826.8 (a) $ - $ 1,826.8 Total assets measured at fair value $ - $ 1,826.8 $ - $ 1,826.8 (a) Fair value is based on inputs that are observable for the asset or liability, other than quoted prices.

Customer Trust Funds (Tables)

Customer Trust Funds (Tables)	9 Months Ended
	Sep. 30, 2020
Investments Debt And Equity Securities [Abstract]
Schedule of Amortized Cost and Fair Values of Investments of Customer Trust Funds Available for Sale	September 30, 2020 Amortized Gross Unrealized Fair Cost Gain Loss Value (Dollars in millions) Money market securities, investments carried at cost and other cash equivalents $ 1,050.6 $ — $ — $ 1,050.6 Available for sale investments: U.S. government and agency securities 441.9 23.6 — 465.5 Canadian and provincial government securities 379.8 16.1 — 395.9 Corporate debt securities 466.1 19.8 (0.1 ) 485.8 Asset-backed securities 201.2 5.4 — 206.6 Mortgage-backed securities 12.5 0.2 — 12.7 Other securities 4.5 — — 4.5 Total available for sale investments 1,506.0 65.1 (0.1 ) 1,571.0 Invested customer trust funds 2,556.6 $ 65.1 $ (0.1 ) 2,621.6 Trust receivables 24.6 25.0 Total customer trust funds $ 2,581.2 $ 2,646.6 December 31, 2019 Amortized Gross Unrealized Fair Cost Gain Loss Value (Dollars in millions) Money market securities, investments carried at cost and other cash equivalents $ 1,348.1 $ — $ — $ 1,348.1 Available for sale investments: U.S. government and agency securities 542.4 7.1 (0.3 ) 549.2 Canadian and provincial government securities 406.7 5.4 (0.7 ) 411.4 Corporate debt securities 562.2 9.0 (0.3 ) 570.9 Asset-backed securities 270.0 1.7 (0.3 ) 271.4 Mortgage-backed securities 19.8 0.2 (0.1 ) 19.9 Other securities 4.0 — — 4.0 Total available for sale investments 1,805.1 23.4 (1.7 ) 1,826.8 Invested customer trust funds 3,153.2 $ 23.4 $ (1.7 ) 3,174.9 Trust receivables (a) 40.4 29.2 Total customer trust funds $ 3,193.6 $ 3,204.1 (a) The fair value of trust receivables as of December 31, 2019, included a loss of $11.2 million related to unrecovered duplicate payments resulting from an isolated service incident on September 26, 2019. Ceridian was liable for these unrecovered duplicate payments and had reimbursed the customer trust for the resulting losses as of March 31, 2020. Please refer to Note 14, “Commitments and Contingencies,” for further discussion of the September 26, 2019, isolated service incident.
Schedule of Unrealized Losses and Fair Value	The following represents the gross unrealized losses and the related fair value of the investments of customer trust funds available for sale, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position. September 30, 2020 Less than 12 months 12 months or more Total Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value (Dollars in millions) Corporate debt securities $ — $ — $ (0.1 ) $ 5.8 $ (0.1 ) $ 5.8 Total available for sale investments $ — $ — $ (0.1 ) $ 5.8 $ (0.1 ) $ 5.8
Schedule of Amortized Cost and Fair Value of Investment Securities Available for Sale by Contractual Maturity	The amortized cost and fair value of investment securities available for sale at September 30, 2020, by contractual maturity are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or to prepay obligations with or without call or prepayment penalties. September 30, 2020 Cost Fair Value (Dollars in millions) Due in one year or less $ 1,398.7 $ 1,402.0 Due in one to three years 689.9 719.2 Due in three to five years 343.5 362.2 Due after five years 124.5 138.2 Invested customer trust funds $ 2,556.6 $ 2,621.6

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Changes in Goodwill	Goodwill and changes therein were as follows: (Dollars in millions) Balance at December 31, 2018 $ 1,927.4 Acquisitions 25.7 Translation 20.4 Balance at December 31, 2019 1,973.5 Acquisition 47.6 Translation (9.8 ) Balance at September 30, 2020 $ 2,011.3
Schedule of Other Intangible Assets	Other intangible assets consisted of the following: September 30, 2020 Gross Carrying Amount Accumulated Amortization Net Estimated Life Range (Years) (Dollars in millions) Customer lists and relationships $ 225.9 $ (207.5 ) $ 18.4 5-15 Trade name 177.4 (2.0 ) 175.4 3 and Indefinite Technology 157.3 (153.8 ) 3.5 3-4 Total other intangible assets $ 560.6 $ (363.3 ) $ 197.3 December 31, 2019 Gross Carrying Amount Accumulated Amortization Net Estimated Life Range (Years) (Dollars in millions) Customer lists and relationships $ 212.5 $ (208.2 ) $ 4.3 5-15 Trade name 174.0 (2.1 ) 171.9 3 and Indefinite Technology 156.1 (154.4 ) 1.7 3-4 Total other intangible assets $ 542.6 $ (364.7 ) $ 177.9

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Schedule of Debt Obligations	Our debt obligations consisted of the following as of the periods presented: September 30, December 31, 2020 2019 (Dollars in millions) Term Debt, interest rate of 2.6% and 4.8%, respectively $ 666.4 $ 671.5 Revolving Credit Facility ($300.0 million available capacity less amounts reserved for letters of credit, which were $0.7 million and $1.9 million, respectively) 295.0 — Canada Line of Credit (CDN $7.0 million letter of credit capacity, which was fully utilized; USD $5.3 million and USD $5.4 million, respectively) — — Financing lease liabilities (Please refer to Note 13) 9.4 12.4 Total debt 970.8 683.9 Less unamortized discount on Term Debt 1.2 1.4 Less unamortized debt issuance costs on Term Debt 4.7 5.4 Less current portion of long-term debt 7.7 10.8 Long-term debt, less current portion $ 957.2 $ 666.3
Schedule of Future Principal Payments and Maturities of Indebtedness, Excluding Financing Lease Obligations	The future principal payments and maturities of our indebtedness, excluding financing lease obligations, are as follows: Years Ending December 31, Amount (Dollars in millions) 2020 $ 1.7 2021 6.8 2022 6.8 2023 301.8 2024 6.8 Thereafter 637.5 $ 961.4

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2020
Compensation And Retirement Disclosure [Abstract]
Components of Net Periodic Cost for Defined Benefit Pension Plan and for Postretirement Benefit Plan	The components of net periodic cost for our defined benefit pension plan and for our postretirement benefit plan are included in the following tables: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Net Periodic Pension Cost (Dollars in millions) Interest cost $ 3.2 $ 4.5 $ 9.6 $ 13.6 Actuarial loss amortization 3.9 3.2 11.7 9.6 Less: Expected return on plan assets (5.7 ) (5.9 ) (17.1 ) (17.7 ) Net periodic pension cost $ 1.4 $ 1.8 $ 4.2 $ 5.5 Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Net Periodic Postretirement Benefit (Dollars in millions) Interest cost $ 0.1 $ 0.2 $ 0.4 $ 0.4 Actuarial gain amortization (0.6 ) (0.6 ) (1.8 ) (1.8 ) Prior service credit amortization (0.1 ) (0.1 ) (0.3 ) (0.2 ) Net periodic postretirement benefit gain $ (0.6 ) $ (0.5 ) $ (1.7 ) $ (1.6 )

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Performance-Based Stock Option Activity	Performance-based stock option activity under the 2007 SIP, the 2013 SIP, and the 2018 EIP was as follows: Shares Weighted Average Exercise Price (per share) Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in millions) Performance-based options outstanding at December 31, 2019 68,281 $ 13.58 2.6 $ 3.7 Granted 1,818,728 65.27 — — Exercised (31,678 ) (13.46 ) — — Forfeited or expired — — — — Performance-based options outstanding at September 30, 2020 1,855,331 $ 64.25 9.5 $ 34.1 Performance-based options exercisable at September 30, 2020 36,603 $ 13.68 2.1 $ 2.5
Summary of Term-Based Stock Option Activity	Term-based stock option activity under the 2007 SIP, the 2013 SIP, and the 2018 EIP, for the period was as follows: Shares Weighted Average Exercise Price (per share) Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (in millions) Term-based options outstanding at December 31, 2019 13,144,937 $ 29.74 7.8 $ 501.3 Granted 2,262,708 65.82 — — Exercised (3,033,856 ) (20.23 ) — — Forfeited or expired (500,715 ) (28.60 ) — — Term-based options outstanding at September 30, 2020 11,873,074 $ 39.09 8.0 $ 517.2 Term-based options exercisable at September 30, 2020 3,681,857 $ 26.98 7.0 $ 205.0
Summary of Restricted Stock Units Activity	RSU activity under the 2013 SIP and the 2018 EIP, for the period was as follows: Shares RSUs outstanding at December 31, 2019 819,818 Granted 629,554 Shares issued upon vesting of RSUs (63,144 ) Forfeited or canceled (17,109 ) RSUs outstanding at September 30, 2020 1,369,119 RSUs releasable at September 30, 2020 422,635
Summary of Global Employee Stock Purchase Plan Activity	Our GESPP activity was as follows: Period Ended Shares Issued Purchase Price (per share) March 31, 2020 49,802 $ 42.56 June 30, 2020 42,706 59.52 September 30, 2020 42,719 59.52

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2020
Revenue From Contract With Customer [Abstract]
Summary of Disaggregation of Revenue	Disaggregation of Revenue Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in millions) Revenue: Cloud Dayforce Recurring services $ 122.7 $ 109.4 $ 369.3 $ 314.7 Professional services and other 35.1 34.3 108.8 96.3 Total Dayforce revenue 157.8 143.7 478.1 411.0 Powerpay Recurring services 18.6 21.6 56.6 64.0 Professional services and other 0.3 0.2 0.8 0.8 Total Powerpay revenue 18.9 21.8 57.4 64.8 Total Cloud revenue 176.7 165.5 535.5 475.8 Bureau Recurring services 26.8 36.4 82.8 125.0 Professional services and other 0.9 0.4 1.4 1.5 Total Bureau revenue 27.7 36.8 84.2 126.5 Total revenue $ 204.4 $ 202.3 $ 619.7 $ 602.3
Schedule of Changes in Deferred Revenue	Deferred revenue primarily consists of payments received in advance of revenue recognition. The changes in deferred revenue were as follows: Nine Months Ended September 30, 2020 2019 (Dollars in millions) Deferred revenue, beginning of period $ 25.5 $ 23.2 New billings 313.2 262.0 Revenue recognized (312.4 ) (258.0 ) Effect of exchange rate (0.2 ) — Deferred revenue, end of period $ 26.1 $ 27.2

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Components of Accumulated Other Comprehensive Loss	The components of accumulated other comprehensive loss were as follows: Foreign Currency Translation Adjustment Unrealized Gain (Loss) from Invested Customer Trust Funds Pension Liability Adjustment Total (Dollars in millions) Balance as of December 31, 2019 $ (178.4 ) $ 10.2 $ (170.2 ) $ (338.4 ) Other comprehensive income (loss) before income taxes and reclassifications (14.7 ) 43.3 — 28.6 Income tax expense — (11.6 ) (2.7 ) (14.3 ) Reclassifications to earnings — — 9.9 9.9 Other comprehensive (loss) income (14.7 ) 31.7 7.2 24.2 Balance as of September 30, 2020 $ (193.1 ) $ 41.9 $ (163.0 ) $ (314.2 )

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Supplemental Balance Sheet Information Related to Leases	Supplemental balance sheet information related to leases was as follows: Lease Type Balance Sheet Classification September 30, 2020 December 31, 2019 (Dollars in millions) ASSETS Operating lease assets Trade and other receivables, net $ 5.4 $ 5.5 Operating lease assets Prepaid expenses and other current assets 2.2 1.2 Operating lease assets Right of use lease asset 37.5 32.0 Financing lease assets Property, plant, and equipment, net 8.2 8.8 Total lease assets $ 53.3 $ 47.5 LIABILITIES Current Financing lease liabilities Current portion of long-term debt $ 0.9 $ 4.0 Operating lease liabilities Current portion of long-term lease liabilities 10.3 8.8 Noncurrent Financing lease liabilities Long-term debt, less current portion 8.5 8.4 Operating lease liabilities Long-term lease liabilities, less current portion 34.1 30.1 Total lease liabilities $ 53.8 $ 51.3
Components of Lease Expense	The components of lease expense were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Lease Cost (Dollars in millions) Operating lease cost $ 2.4 $ 4.2 $ 7.0 $ 12.6 Financing lease cost: Depreciation of lease assets 0.2 — 0.6 — Interest on lease liabilities 0.1 — 0.3 — Sublease income (1.1 ) (1.0 ) (3.2 ) (3.3 ) Total lease cost, net $ 1.6 $ 3.2 $ 4.7 $ 9.3

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2020
Related Party Transactions [Abstract]
Schedule of Revenue from Portfolio Companies	We provide Dayforce and related services to certain investment portfolio companies of THL Managers VI, LLC and Cannae Holdings, Inc., which are considered related parties due to certain shared board members. Revenue from these related parties was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in millions) American Blue Ribbon Holdings, LLC $ 0.4 $ 0.5 $ 1.2 $ 1.4 Essex Technology Group, LLC 0.1 0.2 0.4 0.4 Guaranteed Rate, Inc. 0.3 0.2 0.6 0.7 HighTower Advisors 0.1 0.1 0.1 0.1 Ten-X, LLC 0.1 0.1 0.2 0.3 Philips Feed Services 0.1 0.1 0.2 0.2

Net Income (Loss) per Share (Ta

Net Income (Loss) per Share (Tables)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Schedule of Computations of Basic and Diluted Net Income (Loss) per Share	The basic and diluted net income (loss) per share computations were calculated as follows: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 (Dollars in millions, except share and per share data) Numerator: Net (loss) income $ (0.8 ) $ 62.7 $ 13.3 $ 80.2 Denominator: Weighted-average shares outstanding - basic 147,141,403 142,780,819 145,798,169 141,369,339 Effect of dilutive equity instruments — 6,372,408 6,307,550 6,910,604 Weighted-average shares outstanding - diluted 147,141,403 149,153,227 152,105,719 148,279,943 Net (loss) income per share - basic $ (0.01 ) $ 0.44 $ 0.09 $ 0.57 Net (loss) income per share - diluted $ (0.01 ) $ 0.42 $ 0.09 $ 0.54
Schedule of Potentially Dilutive Weighted Average Shares Excluded from Calculation of Diluted Net Income (Loss) per Share	The following potentially dilutive weighted-average shares were excluded from the calculation of diluted net income (loss) per share because their effect would have been anti-dilutive: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Performance-based stock options — — — — Term-based stock options 7,430,543 4,185,519 1,213,832 3,099,587 Restricted stock units 767,683 11,957 15,502 12,821 Performance stock units 385,240 — — —

Organization - Additional Infor

Organization - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Sep. 30, 2020	Aug. 28, 2020	Dec. 31, 2019
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Common stock shares issued	147,647,117		144,386,618
Secondary Offering [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Common stock shares issued		7,717,347
Shares issued, price per share		$ 72.18
Secondary Offering [Member] | Selling, General and Administrative Expense [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Offering costs	$ 0.4

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Significant Accounting Policies [Line Items]
Amortization expense for the deferred costs	$ 9.8	$ 8.1	$ 27.9	$ 23.5
Other Assets [Member]
Significant Accounting Policies [Line Items]
Deferred costs	$ 118.8		$ 118.8		$ 106.4

Business Combinations - Additio

Business Combinations - Additional Information (Detail) $ in Millions	May 29, 2020USD ($)	Sep. 30, 2020Segment
Business Acquisition [Line Items]
Number of operating segment		1
Number of reportable segment		1
Excelity Global Solutions Pte. Ltd. [Member]
Business Acquisition [Line Items]
Percentage of voting interest	100.00%
Purchase price | $	$ 77.2

Business Combinations - Schedul

Business Combinations - Schedule of Major Classes of Assets and Liabilities Allocated to Purchase Price (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 2,011.3	$ 1,973.5	$ 1,927.4
Excelity Global Solutions Pte. Ltd. [Member]
Business Acquisition [Line Items]
Cash and equivalents	6.6
Trade receivables, prepaid expenses, and other current assets	10.8
Customer trust funds	12.3
Property, plant, and equipment and other assets	4.2
Goodwill	47.6
Other intangible assets, net	20.7
Accounts payable and other current liabilities	(2.2)
Customer trust funds obligations	(13.1)
Other non-current liabilities	(9.7)
Total purchase price	$ 77.2

Fair Value Measurements - Asset

Fair Value Measurements - Asset and Liability Measured at Fair Value Measured on Recurring Basis (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Assets
Available for sale customer trust funds assets	$ 1,571	$ 1,826.8
Total assets measured at fair value	1,571	1,826.8
Fair Value, Inputs, Level 2 [Member]
Assets
Available for sale customer trust funds assets	1,571	1,826.8	[1]
Total assets measured at fair value	$ 1,571	$ 1,826.8
[1]	Fair value is based on inputs that are observable for the asset or liability, other than quoted prices.

Customer Trust Fund - Additiona

Customer Trust Fund - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Investments Debt And Equity Securities [Abstract]
Investment income from invested customer trust fund included in recurring services revenue	$ 10.6	$ 18.3	$ 41.7	$ 62.9

Customer Trust Fund - Investmen

Customer Trust Fund - Investment of Customer Trust Fund (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Money market securities, investments carried at cost and other cash equivalents, Fair Value	$ 1,050.6	$ 1,348.1
Invested customer trust funds, Fair Value	2,621.6	3,174.9
Trust receivables, Fair Value	25	29.2	[1]
Total customer trust funds, Fair Value	2,646.6	3,204.1
Money market securities, investments carried at cost and other cash equivalents, Amortized Cost	1,050.6	1,348.1
Invested customer trust funds, Amortized Cost	2,556.6	3,153.2
Trust receivables, Amortized Cost	24.6	40.4
Total customer trust funds, Amortized Cost	2,581.2	3,193.6
Amortized Cost	1,506	1,805.1
Gross Unrealized Gain	65.1	23.4
Gross Unrealized Loss	(0.1)	(1.7)
Fair value	1,571	1,826.8
U.S. Government and Agencies Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	441.9	542.4
Gross Unrealized Gain	23.6	7.1
Gross Unrealized Loss		(0.3)
Fair value	465.5	549.2
Canadian and Provincial Government Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	379.8	406.7
Gross Unrealized Gain	16.1	5.4
Gross Unrealized Loss		(0.7)
Fair value	395.9	411.4
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	466.1	562.2
Gross Unrealized Gain	19.8	9
Gross Unrealized Loss	(0.1)	(0.3)
Fair value	485.8	570.9
Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	201.2	270
Gross Unrealized Gain	5.4	1.7
Gross Unrealized Loss		(0.3)
Fair value	206.6	271.4
Mortgage-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	12.5	19.8
Gross Unrealized Gain	0.2	0.2
Gross Unrealized Loss		(0.1)
Fair value	12.7	19.9
Other Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4.5	4
Fair value	$ 4.5	$ 4
[1]	The fair value of trust receivables as of December 31, 2019, included a loss of $11.2 million related to unrecovered duplicate payments resulting from an isolated service incident on September 26, 2019. Ceridian was liable for these unrecovered duplicate payments and had reimbursed the customer trust for the resulting losses as of March 31, 2020. Please refer to Note 14, “Commitments and Contingencies,” for further discussion of the September 26, 2019, isolated service incident.

Customer Trust Fund - Investm_2

Customer Trust Fund - Investment of Customer Trust Fund (Parenthetical) (Detail) $ in Millions	3 Months Ended
	Dec. 31, 2019USD ($)
Isolated Service Incident [Member]
Debt Securities, Available-for-sale [Line Items]
Loss on unrecovered duplicate payments	$ 11.2

Customer Trust Fund - Gross Unr

Customer Trust Fund - Gross Unrealized Losses and Related Fair Value of Investment (Detail) $ in Millions	Sep. 30, 2020USD ($)
Debt Securities, Available-for-sale [Line Items]
12 months or more, Unrealized Losses	$ (0.1)
12 months or more, Fair Value	5.8
Total, Unrealized Losses	(0.1)
Total, Fair Value	5.8
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
12 months or more, Unrealized Losses	(0.1)
12 months or more, Fair Value	5.8
Total, Unrealized Losses	(0.1)
Total, Fair Value	$ 5.8

Customer Trust Fund - Amortized

Customer Trust Fund - Amortized Cost and Fair Value of Investment Security Available for Sale (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Investments Debt And Equity Securities [Abstract]
Due in one year or less, Cost	$ 1,398.7
Due in one to three years, Cost	689.9
Due in three to five years, Cost	343.5
Due after five years, Cost	124.5
Invested customer trust funds, Cost	2,556.6	$ 3,153.2
Due in one year or less, Fair Value	1,402
Due in one to three years, Fair Value	719.2
Due in three to five years, Fair Value	362.2
Due after five years, Fair Value	138.2
Invested customer trust funds, Fair Value	$ 2,621.6	$ 3,174.9

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Schedule of Changes in Goodwill (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Balance	$ 1,973.5	$ 1,927.4
Acquisitions	47.6	25.7
Translation	(9.8)	20.4
Balance	$ 2,011.3	$ 1,973.5

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Schedule of Other Intangible Asset (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 560.6	$ 542.6
Accumulated Amortization	(363.3)	(364.7)
Net	197.3	177.9
Trade Name [Member]
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	177.4	174
Accumulated Amortization	(2)	(2.1)
Net	$ 175.4	$ 171.9
Minimum [Member] | Trade Name [Member]
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Estimated Life Range (Years)	3 years	3 years
Maximum [Member] | Trade Name [Member]
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Estimated Life Range (Years)	Indefinite	Indefinite
Customer Lists and Relationships [Member]
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 225.9	$ 212.5
Accumulated Amortization	(207.5)	(208.2)
Net	$ 18.4	$ 4.3
Customer Lists and Relationships [Member] | Minimum [Member]
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Estimated Life Range (Years)	5 years	5 years
Customer Lists and Relationships [Member] | Maximum [Member]
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Estimated Life Range (Years)	15 years	15 years
Technology [Member]
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 157.3	$ 156.1
Accumulated Amortization	(153.8)	(154.4)
Net	$ 3.5	$ 1.7
Technology [Member] | Minimum [Member]
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Estimated Life Range (Years)	3 years	3 years
Technology [Member] | Maximum [Member]
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items]
Estimated Life Range (Years)	4 years	4 years

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense	$ 0.8	$ 4.7	$ 1.6	$ 13.9

Debt - Schedule of Debt Obligat

Debt - Schedule of Debt Obligations (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total debt excluding financing lease liabilities	$ 961.4
Financing lease liabilities (Please refer to Note 13)	9.4	$ 12.4
Total debt	970.8	683.9
Less unamortized discount on Term Debt	1.2	1.4
Less unamortized debt issuance costs on Term Debt	4.7	5.4
Less current portion of long-term debt	7.7	10.8
Long-term debt, less current portion	957.2	666.3
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total debt excluding financing lease liabilities	295
Term Debt [Member]
Debt Instrument [Line Items]
Total debt excluding financing lease liabilities	$ 666.4	$ 671.5

Debt - Schedule of Debt Oblig_2

Debt - Schedule of Debt Obligations (Parenthetical) (Detail) $ in Millions, $ in Millions	Sep. 30, 2020USD ($)	Sep. 30, 2020CAD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2019CAD ($)
Term Debt [Member]
Debt Instrument [Line Items]
Interest rate on debt	2.60%	2.60%	4.80%	4.80%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Available capacity	$ 300
Revolving Credit Facility [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Available capacity	0.7		$ 1.9
Canada Line of Credit [Member]
Debt Instrument [Line Items]
Available capacity	$ 5.3		$ 5.4
Canada Line of Credit [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Available capacity		$ 7		$ 7

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($) $ in Millions	Feb. 19, 2020	Mar. 26, 2019	Sep. 30, 2020	Dec. 31, 2017	Apr. 02, 2020	Dec. 31, 2019	Apr. 30, 2018
Debt Instrument [Line Items]
Fair value of our indebtedness			$ 927.8			$ 675.1
2018 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Available capacity for letters of credit							$ 300
Line of credit maturity date			Apr. 30, 2023
Line of credit facility, borrow amount elected by the company					$ 295
2018 Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate description			2018 Term Debt interest rate was reduced from LIBOR plus 3.00% to LIBOR plus 2.50%.
Accrued interest			$ 0.4			$ 0.1
2018 Senior Secured Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate	2.50%	3.00%		3.25%
2018 Term Debt [Member]
Debt Instrument [Line Items]
Debt instrument principal amount							$ 680
Term loan debt maturity period			Apr. 30, 2025
2018 Term Debt [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate			3.25%

Debt - Schedule of Future Princ

Debt - Schedule of Future Principal Payments and Maturities of Indebtedness, Excluding Financing Lease Obligations (Detail) $ in Millions	Sep. 30, 2020USD ($)
Debt Disclosure [Abstract]
2020	$ 1.7
2021	6.8
2022	6.8
2023	301.8
2024	6.8
Thereafter	637.5
Principal payments and maturities excluding financing lease obligations	$ 961.4

Employee Benefit Plans - Compon

Employee Benefit Plans - Components of Net Periodic Cost for Defined Benefit Pension Plan and for Postretirement Benefit Plan (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic cost (benefit gain)			$ 2.5	$ 3.9
Defined Benefit Pension Plan [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	$ 3.2	$ 4.5	9.6	13.6
Actuarial loss (gain) amortization	3.9	3.2	11.7	9.6
Less: Expected return on plan assets	(5.7)	(5.9)	(17.1)	(17.7)
Net periodic cost (benefit gain)	1.4	1.8	4.2	5.5
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	0.1	0.2	0.4	0.4
Actuarial loss (gain) amortization	(0.6)	(0.6)	(1.8)	(1.8)
Prior service credit amortization	(0.1)	(0.1)	(0.3)	(0.2)
Net periodic cost (benefit gain)	$ (0.6)	$ (0.5)	$ (1.7)	$ (1.6)

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - Subsequent Event [Member] - Pension Plan [Member] - US [Member] $ in Millions	1 Months Ended
	Oct. 31, 2020USD ($)
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension plan contributed amount	$ 105
Pension plan minimum contributions	17
Pension plan, voluntary contributions	$ 88

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail)	Nov. 09, 2018shares	Apr. 24, 2018shares	Sep. 30, 2020USD ($)$ / sharesshares	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)StockOption$ / sharesshares	Sep. 30, 2019USD ($)	Mar. 31, 2020shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense | $			$ 18,500,000	$ 10,400,000	$ 46,300,000	$ 26,000,000
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of tranches of stock options | StockOption					2
Share-based compensation expense related to unvested stock option awards not yet recognized | $			26,200,000		$ 26,200,000
Share-based compensation expense related to unvested awards expected to be recognized over a weighted average period					2 years 6 months
Term Based Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense related to unvested stock option awards not yet recognized | $			$ 95,900,000		$ 95,900,000
Share-based compensation expense related to unvested awards expected to be recognized over a weighted average period					1 year 10 months 24 days
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense related to unvested awards expected to be recognized over a weighted average period					1 year 9 months 18 days
Stock options, vested					215,441
Unvested restricted stock units outstanding			946,484		946,484
Vested restricted stock units outstanding			422,635		422,635
Share-based compensation expense related to unvested restricted stock units not yet recognized | $			$ 45,400,000		$ 45,400,000
Share-based Compensation Award, Tranche Three [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period					4 years
Minimum [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period					1 year
Maximum [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period					3 years
HCM Stock Incentive Plan 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares outstanding			2,500		2,500
HCM Stock Incentive Plan 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares outstanding			2,882,412		2,882,412
Share based compensation arrangement by share based payment award exercise period after employment termination					90 days
Stock option awards, contractual term					10 years
HCM Stock Incentive Plan 2013 [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period					4 years
HCM Stock Incentive Plan 2013 [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period					5 years
HCM Equity Incentive Plan 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares outstanding			12,354,165		12,354,165
Share based compensation arrangement by share based payment award exercise period after employment termination		90 days
Stock option awards, contractual term		10 years
Number of shares authorized		13,500,000
Common stock, share Reserve							4,199,089
Shares reserved for issuance increase percentage		3.00%
Shares available for future grants of equity awards			9,541,117		9,541,117
HCM Equity Incentive Plan 2018 [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period					3 years
Options, Granted					1,500,000
Exercise price per share | $ / shares			$ 65.26		$ 65.26
Vesting conditions description					The vesting conditions for the Performance Option Award are based on the Company’s performance on the New York Stock Exchange (“NYSE”) with 750,000 shares available to vest when the Company’s per share closing price on the NYSE meets or exceeds $110.94, or 1.7 times the exercise price, for ten consecutive trading days, and the remaining 750,000 shares are available to vest when the Company’s per share closing price on the NYSE meets or exceeds $130.52, or 2.0 times the exercise price, for ten consecutive trading days.
HCM Equity Incentive Plan 2018 [Member] | Performance Shares [Member] | Monte-Carlo Simulation Model [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period					5 years 3 months 18 days
HCM Equity Incentive Plan 2018 [Member] | Performance Stock Units ("PSUs") [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
PSUs, granted					145,017
PSUs, forfeited and cancelled					3,464
HCM Equity Incentive Plan 2018 [Member] | Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period		4 years
HCM Equity Incentive Plan 2018 [Member] | Closing Price Per Share Exceeds $110.94 or 1.7 Times the Exercise Price [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available to vest					750,000
Closing price per share on NYSE to available for vest | $ / shares			110.94		$ 110.94
HCM Equity Incentive Plan 2018 [Member] | Closing Price Per Share Exceeds $130.52 or 2.0 Times the Exercise Price [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available to vest					750,000
Closing price per share on NYSE to available for vest | $ / shares			$ 130.52		$ 130.52
HCM Equity Incentive Plan 2018 [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period		1 year
HCM Equity Incentive Plan 2018 [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period		3 years
2020 Management Incentive Plan [Member] | Performance Stock Units ("PSUs") [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum incentive vesting of PSUs					125.00%
Share-based compensation expense related to unvested PSUs not yet recognized | $			$ 10,000,000		$ 10,000,000
HCM Global Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option awards, contractual term	10 years
Shares available for future grants of equity awards	2,102,709
Description for purchase price of fair market value of common stock					The purchase price is the lower of (i) 85% of the fair market value of a share of common stock on the offering date (the first trading day of the offering period commencing on January 1 and concluding on December 31) or (ii) 85% of the fair market value of a share of common stock on the purchase date.
Percentage of fair market value of a share of common stock on offering date	85.00%
Percentage of fair market value of share of common stock on purchase date	85.00%
HCM Global Employee Stock Purchase Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	2,500,000

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Performance-Based Stock Option Activity (Detail) - Performance Shares [Member] - Share Based Compensation Plans [Member] - USD ($) $ / shares in Units, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Shares
Options Outstanding at Beginning of Period	68,281
Options, Granted	1,818,728
Options, Exercised	(31,678)
Options, Forfeited or expired	0
Options Outstanding at End of Period	1,855,331	68,281
Options Exercisable at End of Period	36,603
Weighted Average Exercise Price (per share)
Weighted Average Exercise Price at Beginning of Period	$ 13.58
Weighted Average Exercise Price, Granted	65.27
Weighted Average Exercise Price, Exercised	(13.46)
Weighted Average Exercise Price, Forfeited or expired	0
Weighted Average Exercise Price at End of Period	64.25	$ 13.58
Weighted Average Exercise Price Exercisable at End of Period	$ 13.68
Weighted Average Remaining Contractual Term (in years)
Weighted Average Remaining Contractual Term (in years)	9 years 6 months	2 years 7 months 6 days
Weighted Average Remaining Contractual Term Exercisable (in years)	2 years 1 month 6 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value, Options Outstanding	$ 34.1	$ 3.7
Aggregate Intrinsic Value, Options Exercisable	$ 2.5

Share-Based Compensation - Su_2

Share-Based Compensation - Summary of Term-Based Stock Option Activity (Detail) - Term Based Stock Options [Member] - Share Based Compensation Plans [Member] - USD ($) $ / shares in Units, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Shares
Options Outstanding at Beginning of Period	13,144,937
Options, Granted	2,262,708
Options, Exercised	(3,033,856)
Options, Forfeited or expired	(500,715)
Options Outstanding at End of Period	11,873,074	13,144,937
Options Exercisable at End of Period	3,681,857
Weighted Average Exercise Price (per share)
Weighted Average Exercise Price at Beginning of Period	$ 29.74
Weighted Average Exercise Price, Granted	65.82
Weighted Average Exercise Price, Exercised	(20.23)
Weighted Average Exercise Price, Forfeited or expired	(28.60)
Weighted Average Exercise Price at End of Period	39.09	$ 29.74
Weighted Average Exercise Price Exercisable at End of Period	$ 26.98
Weighted Average Remaining Contractual Term (in years)
Weighted Average Remaining Contractual Term (in years)	8 years	7 years 9 months 18 days
Weighted Average Remaining Contractual Term Exercisable (in years)	7 years
Aggregate Intrinsic Value
Aggregate Intrinsic Value, Options Outstanding	$ 517.2	$ 501.3
Aggregate Intrinsic Value, Options Exercisable	$ 205

Share-Based Compensation - Su_3

Share-Based Compensation - Summary of Restricted Stock Units (Detail) - Restricted Stock Units (RSUs) [Member]	9 Months Ended
	Sep. 30, 2020shares
Restricted Stock Units
RSUs, Shares issued upon vesting of RSUs	(215,441)
RSUs outstanding at End of Period	946,484
Share Based Compensation Plans [Member]
Restricted Stock Units
RSUs outstanding at Beginning of Period	819,818
RSUs, Granted	629,554
RSUs, Shares issued upon vesting of RSUs	(63,144)
RSUs, Forfeited or canceled	(17,109)
RSUs outstanding at End of Period	1,369,119
RSUs releasable at End of Period	422,635

Share-Based Compensation - Su_4

Share-Based Compensation - Summary of Global Employee Stock Purchase Plan Activity (Detail) - HCM Global Employee Stock Purchase Plan [Member] - Common Stock [Member] - $ / shares	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued	42,719	42,706	49,802
Purchase Price (per share)	$ 59.52	$ 59.52	$ 42.56

Revenue - Additional Informatio

Revenue - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)CloudofferingEmployeeService	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Revenue [Line Items]
Float revenue	$ 10.6	$ 18.3	$ 41.7	$ 62.9
Contract asset	53.4		$ 53.4		$ 43.2
Remaining performance obligation, description of practical expedient			In accordance with the practical expedient provided in ASC Topic 606, performance obligations that are billed and recognized as they are delivered, primarily professional services contracts that are on a time and materials basis, are excluded from the transaction price for remaining performance obligations disclosed above.
Cloud Revenue [Member]
Revenue [Line Items]
Number of cloud offering delivering solution | Cloudoffering			2
Powerpay [Member] | Maximum [Member]
Revenue [Line Items]
Number of employees generating revenue from recurring fees | Employee			20
Bureau Revenue [Member]
Revenue [Line Items]
Number of primary service lines delivering solutions | Service			3
Recurring Services [Member]
Revenue [Line Items]
Float revenue	$ 10.6	$ 18.3	$ 41.7	$ 62.9

Revenue - Summary of Disaggrega

Revenue - Summary of Disaggregation of Revenue (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation Of Revenue [Line Items]
Total revenue	$ 204.4	$ 202.3	$ 619.7	$ 602.3
Cloud Dayforce Recurring Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	122.7	109.4	369.3	314.7
Cloud Dayforce Professional Services and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	35.1	34.3	108.8	96.3
Cloud Dayforce Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	157.8	143.7	478.1	411
Cloud Powerpay Recurring Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	18.6	21.6	56.6	64
Cloud Powerpay Professional Services and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	0.3	0.2	0.8	0.8
Cloud Powerpay Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	18.9	21.8	57.4	64.8
Cloud Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	176.7	165.5	535.5	475.8
Bureau Recurring Services Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	26.8	36.4	82.8	125
Bureau Professional Services and Other Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	0.9	0.4	1.4	1.5
Bureau Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 27.7	$ 36.8	$ 84.2	$ 126.5

Revenue - Schedule of Changes i

Revenue - Schedule of Changes in Deferred Revenue (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Revenue From Contract With Customer [Abstract]
Deferred revenue, beginning of period	$ 25.5	$ 23.2
New billings	313.2	262
Revenue recognized	(312.4)	(258)
Effect of exchange rate	(0.2)
Deferred revenue, end of period	$ 26.1	$ 27.2

Revenue - Additional Informat_2

Revenue - Additional Information 1 (Detail) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-10-01 $ in Millions	Sep. 30, 2020USD ($)
Revenue [Line Items]
Remaining performance obligations recognition period	3 years
Revenue expected to be recognized, amount	$ 926.1

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 1,882.3
Other comprehensive income (loss) before income taxes and reclassifications	28.6
Income tax expense	(14.3)
Reclassifications to earnings	9.9
Other comprehensive (loss) income	24.2
Ending balance	2,036.3
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(178.4)
Other comprehensive income (loss) before income taxes and reclassifications	(14.7)
Other comprehensive (loss) income	(14.7)
Ending balance	(193.1)
Unrealized Gain (Loss) from Invested Customer Trust Funds [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	10.2
Other comprehensive income (loss) before income taxes and reclassifications	43.3
Income tax expense	(11.6)
Other comprehensive (loss) income	31.7
Ending balance	41.9
Pension Liability Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(170.2)
Income tax expense	(2.7)
Reclassifications to earnings	9.9
Other comprehensive (loss) income	7.2
Ending balance	(163)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(338.4)
Ending balance	$ (314.2)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Taxes [Line Items]
Income tax expense (benefit)	$ (5.5)	$ (65.6)	$ (5.7)	$ (57.5)
Unrecognized tax benefits	1.8		1.8		$ 1.5
Accrued Interest included in unrecognized tax benefits	0.3		0.3		$ 0.2
Unrecognized tax benefits if recognized would impact on effective income tax rate	1.8		$ 1.8
Income tax examination description			With a few exceptions, we are no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities for years before 2015.
Deferred Compensation, Share-based Payments
Income Taxes [Line Items]
Income tax expense (benefit)			$ 2.8
State [Member]
Income Taxes [Line Items]
Valuation allowance	$ 12		12
Income tax expense (benefit)			4.8
Base Erosion and Anti-Abuse Tax ("BEAT") [Member]
Income Taxes [Line Items]
Income tax expense (benefit)			(6.8)
Unremitted Foreign Earnings [Member]
Income Taxes [Line Items]
Income tax expense (benefit)			2.3
US Domestic State and Foreign Operations [Member]
Income Taxes [Line Items]
Income tax expense (benefit)			$ 6.2

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Operating Leased Assets [Line Items]
Right of use lease asset	$ 37.5	$ 32
Financing lease assets noncurrent	$ 8.2	$ 8.8
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet	us-gaap:PropertyPlantAndEquipmentNet
Total lease assets	$ 53.3	$ 47.5
Finance lease liability current	$ 0.9	$ 4
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtCurrent	us-gaap:LongTermDebtCurrent
Operating lease liability current	$ 10.3	$ 8.8
Finance lease liability Noncurrent	$ 8.5	$ 8.4
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtNoncurrent	us-gaap:LongTermDebtNoncurrent
Operating lease liability noncurrent	$ 34.1	$ 30.1
Total lease liabilities	53.8	51.3
Trade And Other Receivables Net
Operating Leased Assets [Line Items]
Operating lease assets current	5.4	5.5
Prepaid Expenses and Other Current Assets
Operating Leased Assets [Line Items]
Operating lease assets current	$ 2.2	$ 1.2

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Lease Cost
Operating lease cost	$ 2.4	$ 4.2	$ 7	$ 12.6
Financing lease cost:
Depreciation of lease assets	0.2		0.6
Interest on lease liabilities	0.1		0.3
Sublease income	(1.1)	(1)	(3.2)	(3.3)
Total lease cost, net	$ 1.6	$ 3.2	$ 4.7	$ 9.3

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - Isolated Service Incident [Member] - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2020	Dec. 31, 2019	Sep. 26, 2019
Commitments And Contingencies [Line Items]
Duplicate payments for payroll customers				$ 18.8
Loss on unrecovered duplicate payments	$ 11.2
Recovery efforts resulting in collection		$ 0.4
Selling, General and Administrative Expense [Member]
Commitments And Contingencies [Line Items]
Loss on unrecovered duplicate payments			$ 11.2

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Fleet Cor Technologies Or Wholly Owned Affiliates [Member] | Dayforce HCM Services and Other Administrative Services [Member]
Revenue from related parties	$ 0.2	$ 0.2	$ 0.7	$ 0.6
Dun and Bradstreet [Member] | Service Agreement [Member]
Payment made to related party			0.4
The Stronach Group [Member] | Dayforce [Member]
Revenue from related parties			$ 0.1	0.2
Fidelity National Financial, Inc. [Member] | Payroll-Related Tax Filings Services [Member]
Revenue from related parties		$ 0.1		$ 0.3

Related Party Transactions - Sc

Related Party Transactions - Schedule of Revenue from Portfolio Companies (Detail) - Dayforce [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
American Blue Ribbon Holdings, LLC [Member]
Related Party Transaction [Line Items]
Revenue from related parties	$ 0.4	$ 0.5	$ 1.2	$ 1.4
Essex Technology Group, LLC [Member]
Related Party Transaction [Line Items]
Revenue from related parties	0.1	0.2	0.4	0.4
Guaranteed Rate, Inc. [Member]
Related Party Transaction [Line Items]
Revenue from related parties	0.3	0.2	0.6	0.7
HighTower Advisors [Member]
Related Party Transaction [Line Items]
Revenue from related parties	0.1	0.1	0.1	0.1
Ten-X, LLC [Member]
Related Party Transaction [Line Items]
Revenue from related parties	0.1	0.1	0.2	0.3
Philips Feed Services [Member]
Related Party Transaction [Line Items]
Revenue from related parties	$ 0.1	$ 0.1	$ 0.2	$ 0.2

Net Income (Loss) per Share - S

Net Income (Loss) per Share - Schedule of Computations of Basic and Diluted Net Income (Loss) per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net (loss) income	$ (0.8)	$ 62.7	$ 13.3	$ 80.2
Denominator:
Weighted-average shares outstanding - basic	147,141,403	142,780,819	145,798,169	141,369,339
Effect of dilutive equity instruments		6,372,408	6,307,550	6,910,604
Weighted-average shares outstanding - diluted	147,141,403	149,153,227	152,105,719	148,279,943
Net (loss) income per share - basic	$ (0.01)	$ 0.44	$ 0.09	$ 0.57
Net (loss) income per share - diluted	$ (0.01)	$ 0.42	$ 0.09	$ 0.54

Net Income (Loss) per Share -_2

Net Income (Loss) per Share - Schedule of Potentially Dilutive Weighted Average Shares Excluded from Calculation of Diluted Net Income (Loss) per Share (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Term Based Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	7,430,543	4,185,519	1,213,832	3,099,587
Restricted Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	767,683	11,957	15,502	12,821
Performance Stock Units ("PSUs") [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	385,240