Unisys (UIS) 10-K 26 Feb 24 2023 FY Annual report Financial data

Cover

Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Jan. 31, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-8729
Entity Registrant Name	UNISYS CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	38-0387840
Entity Address, Address Line One	801 Lakeview Drive
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Blue Bell
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19422
City Area Code	215
Local Phone Number	986-4011
Title of 12(b) Security	Common Stock, par value $.01
Trading Symbol	UIS
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 263
Entity Common Stock, Shares Outstanding		68,410,477
Documents Incorporated by Reference	Portions of Unisys Corporation’s Definitive Proxy Statement for the 2024 Annual Meeting of Stockholders are incorporated by reference into Part III hereof.
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus (i.e. Q1,Q2,Q3,FY)	FY
Entity Central Index Key	0000746838

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2023
Audit Information [Abstract]
Auditor Name	PricewaterhouseCoopers LLP
Auditor Location	Philadelphia, Pennsylvania
Auditor Firm ID	238

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue	$ 2,015.4	$ 1,979.9	$ 2,054.4
Costs and expenses
Cost of revenue	1,464.1	1,450.3	1,482.4
Selling, general and administrative	450.3	453.2	389.5
Research and development	24.1	24.2	28.5
Costs and expenses	1,938.5	1,927.7	1,900.4
Operating income	76.9	52.2	154
Interest expense	30.8	32.4	35.4
Other (expense), net	(393.9)	(82.4)	(580.3)
Loss before income taxes	(347.8)	(62.6)	(461.7)
Provision for (benefit from) income taxes	79.3	42.3	(11.9)
Consolidated net loss	(427.1)	(104.9)	(449.8)
Net income (loss) attributable to noncontrolling interests	3.6	1.1	(1.3)
Net loss attributable to Unisys Corporation	$ (430.7)	$ (106)	$ (448.5)
Loss per share attributable to Unisys Corporation
Basic (in dollars per share)	$ (6.31)	$ (1.57)	$ (6.75)
Diluted (in dollars per share)	$ (6.31)	$ (1.57)	$ (6.75)
Services
Revenue	$ 1,665.9	$ 1,597.3	$ 1,699.3
Costs and expenses
Cost of revenue	1,282.4	1,285.9	1,358.7
Technology
Revenue	349.5	382.6	355.1
Costs and expenses
Cost of revenue	$ 181.7	$ 164.4	$ 123.7

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Consolidated net loss	$ (427.1)	$ (104.9)	$ (449.8)
Other comprehensive income
Foreign currency translation	67.9	(117.5)	(40.5)
Postretirement adjustments, net of tax of $(32.2) in 2023, $15.2 in 2022 and $64.5 in 2021	181.1	291.7	721.8
Total other comprehensive income	249	174.2	681.3
Comprehensive (loss) income	(178.1)	69.3	231.5
Comprehensive (loss) income attributable to noncontrolling interests	(23.1)	(12.8)	4.6
Comprehensive (loss) income attributable to Unisys Corporation	$ (155)	$ 82.1	$ 226.9

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Postretirement adjustments, tax	$ (32.2)	$ 15.2	$ 64.5

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 387.7	$ 391.8
Accounts receivable, net	454.5	402.5
Contract assets	11.7	28.9
Inventories	15.3	14.9
Prepaid expenses and other current assets	101.8	92.3
Total current assets	971	930.4
Properties	396.4	410.8
Less – Accumulated depreciation and amortization	332.1	334.9
Properties, net	64.3	75.9
Outsourcing assets, net	31.6	66.4
Marketable software, net	166.2	165.1
Operating lease right-of-use assets	35.4	42.5
Prepaid postretirement assets	38	119.5
Deferred income taxes	114	118.6
Goodwill	287.4	287.1
Intangible assets, net	42.7	52.4
Restricted cash	9	10.9
Assets held-for-sale	4.9	6.4
Other long-term assets	200.9	190.4
Total assets	1,965.4	2,065.6
Current liabilities:
Current maturities of long-term debt	13	17.4
Accounts payable	130.9	160.8
Deferred revenue	198.6	200.7
Other accrued liabilities	308.4	271.6
Total current liabilities	650.9	650.5
Long-term debt	491.2	495.7
Long-term postretirement liabilities	787.7	714.6
Long-term deferred revenue	104.4	122.3
Long-term operating lease liabilities	25.6	29.7
Other long-term liabilities	44	31
Commitments and contingencies (see Note 18)
(Deficit) equity:
Common stock, par value $.01 per share (150.0 shares authorized; shares issued: 2023, 74.0 and 2022, 73.3)	0.7	0.7
Accumulated deficit	(1,945.7)	(1,515)
Treasury stock, shares at cost: 2023, 5.6 and 2022, 5.5	(156.4)	(156)
Paid-in capital	4,749.9	4,731.6
Accumulated other comprehensive loss	(2,800.3)	(3,076)
Total Unisys Corporation stockholders' deficit	(151.8)	(14.7)
Noncontrolling interests	13.4	36.5
Total (deficit) equity	(138.4)	21.8
Total liabilities and (deficit) equity	$ 1,965.4	$ 2,065.6

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	74,000,000	73,300,000
Treasury stock at cost (in shares)	5,600,000	5,500,000

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Consolidated net loss	$ (427.1)	$ (104.9)	$ (449.8)
Adjustments to reconcile consolidated net loss to net cash provided by operating activities:
Foreign currency losses	0.2	6.8	2.6
Non-cash interest expense	1.2	1.3	1.8
Employee stock compensation	17.2	20	18.8
Depreciation and amortization of properties	29.1	50.2	30.5
Depreciation and amortization of outsourcing assets	50.3	64.5	68
Amortization of marketable software	49.7	58.7	71.9
Amortization of intangible assets	9.7	10.1	3
Other non-cash operating activities	(0.2)	0.3	(0.6)
Loss on disposal of capital assets	6	6.6	2.2
Postretirement contributions	(48)	(43.7)	(56.4)
Postretirement expense	388.5	45.3	552
Deferred income taxes, net	24.5	(8.3)	(59.2)
Changes in operating assets and liabilities, excluding the effect of acquisitions:
Receivables, net and contract assets	4.2	15.5	47.4
Inventories	0	(8)	6
Other assets	(25.5)	(2.6)	8
Accounts payable and current liabilities	(20.9)	(103.8)	(149.4)
Other liabilities	15.3	4.7	35.7
Net cash provided by operating activities	74.2	12.7	132.5
Cash flows from investing activities
Proceeds from investments	2,751.6	3,336.1	4,148.2
Purchases of investments	(2,740.4)	(3,380.4)	(4,168.1)
Capital additions of properties	(21.3)	(31)	(27.3)
Capital additions of outsourcing assets	(11.4)	(8.6)	(18.5)
Investment in marketable software	(46)	(46.3)	(54.4)
Purchases of businesses, net of cash acquired	(1.2)	(0.3)	(239.3)
Other	(0.9)	(0.9)	(0.9)
Net cash used for investing activities	(69.6)	(131.4)	(360.3)
Cash flows from financing activities
Payments of long-term debt	(16.9)	(17.8)	(103.1)
Proceeds from issuance of long-term debt	0	0	1.5
Proceeds from exercise of stock options	0	0	4.5
Other	(0.4)	(3.8)	(8.4)
Net cash used for financing activities	(17.3)	(21.6)	(105.5)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	6.7	(17.6)	(12.8)
Decrease in cash, cash equivalents and restricted cash	(6)	(157.9)	(346.1)
Cash, cash equivalents and restricted cash, beginning of year	402.7	560.6	906.7
Cash, cash equivalents and restricted cash, end of year	$ 396.7	$ 402.7	$ 560.6

CONSOLIDATED STATEMENTS OF EQUI

CONSOLIDATED STATEMENTS OF EQUITY (DEFICIT) - USD ($) $ in Millions	Total	Total Unisys Corporation	Common Stock Par Value	Accumu-lated Deficit	Treasury Stock At Cost	Paid-in Capital	Accumu-lated Other Compre-hensive Loss	Non-controlling Interests
Beginning Balance at Dec. 31, 2020	$ (312.1)	$ (356.8)	$ 0.7	$ (960.5)	$ (114.4)	$ 4,656.9	$ (3,939.5)	$ 44.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(449.8)	(448.5)		(448.5)				(1.3)
Capped call on conversion of debt	0	0			(30.8)	30.8
Stock-based activity	16.2	16.2			(7)	23.2
Translation adjustments	(40.5)	(39.6)					(39.6)	(0.9)
Postretirement plans	721.8	715					715	6.8
Ending Balance at Dec. 31, 2021	(64.4)	(113.7)	0.7	(1,409)	(152.2)	4,710.9	(3,264.1)	49.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(104.9)	(106)		(106)				1.1
Stock-based activity	16.9	16.9			(3.8)	20.7
Translation adjustments	(117.5)	(111.2)					(111.2)	(6.3)
Postretirement plans	291.7	299.3					299.3	(7.6)
Ending Balance at Dec. 31, 2022	21.8	(14.7)	0.7	(1,515)	(156)	4,731.6	(3,076)	36.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(427.1)	(430.7)		(430.7)				3.6
Stock-based activity	17.9	17.9			(0.4)	18.3
Translation adjustments	67.9	64.6					64.6	3.3
Postretirement plans	181.1	211.1					211.1	(30)
Ending Balance at Dec. 31, 2023	$ (138.4)	$ (151.8)	$ 0.7	$ (1,945.7)	$ (156.4)	$ 4,749.9	$ (2,800.3)	$ 13.4

Summary of significant accounti

Summary of significant accounting policies	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Summary of significant accounting policies	Summary of significant accounting policies Principles of consolidation The consolidated financial statements include the accounts of all majority-owned subsidiaries. Use of estimates The preparation of financial statements in conformity with generally accepted accounting principles in the United States of America (GAAP) requires management to make estimates and assumptions about future events. These estimates and assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities and the reported amounts of revenue and expenses. Such estimates include the valuation of estimated credit losses, contract assets, operating lease right-of-use assets, outsourcing assets, marketable software, goodwill, purchased intangibles and other long-lived assets, legal and environmental contingencies, assumptions used in the calculation for systems integration projects, income taxes, and retirement and other post-employment benefits, among others. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. Management adjusts such estimates and assumptions when facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ materially from these estimates. Changes in those estimates resulting from continuing changes in the economic environment such as rising interest rates, inflation, fluctuation in foreign exchange rates and conflicts and other events of geopolitical significance, will be reflected in the financial statements in future periods. Cash and Cash equivalents Cash and cash equivalents consist of cash on hand, short-term investments purchased with an original maturity of three months or less and certificates of deposit which may be withdrawn at any time at the discretion of the company without penalty. Cash and cash equivalents subject to contractual restrictions and not readily available are classified as restricted cash. The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within the consolidated balance sheets to the total of the amounts shown in the consolidated statements of cash flows. As of December 31, 2023 2022 Cash and cash equivalents $ 387.7 $ 391.8 Restricted cash 9.0 10.9 Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows $ 396.7 $ 402.7 Inventories Inventories are valued at the lower of cost and net realizable value. Cost is determined on the first-in, first-out method. Properties Properties are carried at cost and are depreciated over the estimated lives of such assets using the straight-line method. The estimated lives used, in years, are as follows: buildings, 20 – 50; machinery and office equipment, 4 – 7; rental equipment, 4; and internal-use software, 3 – 10. Outsourcing assets Costs of outsourcing contracts are generally expensed as incurred. However, certain costs incurred upon initiation of an outsourcing contract (principally initial customer setup) are deferred and expensed over the initial contract life. Fixed assets and software used in connection with outsourcing contracts are capitalized and depreciated over the shorter of the initial contract life or in accordance with the fixed asset policy described above. Recoverability of these costs is subject to various business risks. Quarterly, the company compares the carrying value of these assets with the undiscounted future cash flows expected to be generated by them to determine if there is impairment. If impaired, these assets are reduced to an estimated fair value on a discounted cash flow basis. The company prepares its cash flow estimates based on assumptions that it believes to be reasonable but are also inherently uncertain. Actual future cash flows could differ from these estimates. The gross amount of outsourcing assets totaled $563.4 million and $559.4 million as of December 31, 2023 and 2022, respectively, and related accumulated amortization totaled $531.8 million and $493.0 million as of December 31, 2023 and 2022, respectively. Marketable software The cost of development of computer software to be sold or leased, incurred subsequent to establishment of technological feasibility, is capitalized and amortized to cost of sales over the estimated revenue-producing lives of the products. For the company’s proprietary enterprise software products, the amortization period is five years following product release, and for the remaining products, the amortization period is three years following product release. In assessing the estimated revenue-producing lives and recoverability of the products, the company considers operating strategies, underlying technologies utilized, estimated economic life and external market factors, such as expected levels of competition, barriers to entry by potential competitors, stability in the market and governmental regulation. The company continually reassesses the estimated revenue-producing lives of the products and any change in the company’s estimate could result in the remaining amortization expense being accelerated or spread out over a longer period. As of December 31, 2023, the company believes that all unamortized costs are fully recoverable. The gross amount of marketable software totaled $2,213.9 million and $2,174.5 million as of December 31, 2023 and 2022, respectively, and related accumulated amortization totaled $2,047.7 million and $2,009.4 million as of December 31, 2023 and 2022, respectively. Internal-use software The company capitalizes certain internal and external costs incurred to acquire or create internal-use software, principally related to software coding, designing system interfaces, and installation and testing of the software. These costs are amortized in accordance with the fixed asset policy described above. Goodwill and Purchased Intangible Assets Goodwill arising from the acquisition of an entity represents the excess of the purchase price consideration over the fair value of the underlying identifiable intangible assets and net assets or liabilities assumed. Goodwill is initially recognized as an asset and is subsequently measured at cost less any accumulated impairment losses. The company reviews goodwill for impairment annually in the fourth quarter using data as of September 30 of that year, as well as whenever there are events or changes in circumstances (triggering events) that would more likely than not reduce the fair value of one or more reporting units below its respective carrying amount. The company initially assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. This qualitative assessment considers all relevant factors specific to the reporting units, including macroeconomic conditions, industry and market considerations, overall financial performance, changes in share price and relevant entity-specific events. If the company determines that it is not more likely that the carrying amount for a reporting unit is less than its fair value, then subsequent quantitative goodwill impairment testing is not required. If the company determines that it is more likely than not that the carrying amount for a reporting unit is greater than its fair value, then it proceeds with a subsequent quantitative goodwill impairment test. Under the quantitative test, the company compares the fair value of each of its reporting units to their respective carrying value. If the carrying value exceeds fair value, an impairment charge is recognized for the difference. Impaired goodwill is written down to its fair value through a charge to the consolidated statement of income (loss) in the period the impairment is identified. During the fourth quarter of 2023, the company performed a quantitative goodwill impairment test for each reporting unit, and estimated the fair value of the reporting units using both the income approach and the market approach. The income approach incorporates the use of a discounted cash flow method in which the estimated future cash flows and terminal values for each reporting unit are discounted to present value. Cash flow projections are based on management’s estimates of economic and market conditions, which drive key assumptions of revenue growth rates, operating margins, capital expenditures and working capital requirements. The discount rate in turn is based on various market factors and specific risk characteristics of each reporting unit. The market approach estimates fair value by applying performance metric multiples to the reporting unit’s prior and expected operating performance. The multiples are derived from comparable publicly traded companies with similar operating and investment characteristics as the reporting unit. If the fair value of the reporting unit derived using the income approach is significantly different from the fair value estimate using the market approach, the company reevaluates its assumptions used in the two models. When considering the weighting between the market approach and income approach, the company gives more weighting to the income approach. The higher weighting assigned to the income approach takes into consideration that the guideline companies used in the market approach generally represent larger diversified companies relative to the reporting units and may have different long-term growth prospects, among other factors. In order to assess the reasonableness of the calculated reporting unit fair values, the company also compares the sum of the reporting units’ fair values to its market capitalization (per share stock price multiplied by shares outstanding) and calculates an implied control premium (the excess of the sum of the reporting units’ fair values over the market capitalization). The company’s quantitative assessment in the fourth quarter of 2023 indicated that each reporting unit’s fair value exceeded its carrying value, as such no impairment charge was recognized as of December 31, 2023. All reporting units had a fair value in excess of book value. Estimating the fair value of reporting units requires the use of estimates and significant judgments that are based on a number of factors including actual operating results. It is reasonably possible that the judgments and estimates described above could change in future periods, which could have a significant impact on the fair value of the related reporting units. The company continuously monitors and evaluates relevant events and circumstances that could unfavorably impact the significant assumptions noted above, including changes to U.S. treasury rates and equity risk premiums, tax rates, recent market valuations from transactions by comparable companies, volatility in the company’s market capitalization, and general industry, market and macro-economic conditions. It is possible that future changes in such circumstances or in the inputs and assumptions used in estimating the fair value of the reporting units, could require the company to record a non-cash impairment charge. Finite-lived intangible assets purchased in a business combination are recorded at fair value and amortized to cost of revenue - technology and selling, general and administrative expense over their estimated useful lives. Finite-lived intangible assets are tested for impairment whenever events or changes in circumstances would indicate that the carrying value may not be recoverable. An impairment charge would be recognized if the carrying value exceeds fair value in the consolidated statement of income (loss) in the period the impairment is identified. Retirement benefits Accounting rules covering defined benefit pension plans and other postretirement benefits require that amounts recognized in financial statements be determined on an actuarial basis. Management develops the actuarial assumptions used by its U.S. and international defined benefit pension plan obligations based upon the circumstances of each particular plan. The determination of the defined benefit pension plan obligations requires the use of estimates. A significant element in determining the company’s retirement benefits expense or income is the expected long-term rate of return on plan assets. This expected return is an assumption as to the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the projected pension benefit obligation. The company applies this assumed long-term rate of return to a calculated value of plan assets, which recognizes changes in the fair value of plan assets in a systematic manner over four years. This produces the expected return on plan assets that is included in retirement benefits expense or income. The difference between this expected return and the actual return on plan assets is deferred. The net deferral of past asset losses or gains affects the calculated value of plan assets and, ultimately, future retirement benefits expense or income. At December 31 of each year, the company determines the fair value of its retirement benefits plan assets as well as the discount rate to be used to calculate the present value of plan liabilities. Management’s significant assumption used in the determination of the defined benefit pension plan obligations with respect to the U.S. pension plans, is the discount rate. Inherent in deriving the discount rate are significant assumptions with respect to the timing and magnitude of expected benefit payment obligations. The discount rate is an estimate of the interest rate at which the retirement benefits could be effectively settled. In estimating the discount rate, the company looks to rates of return on high-quality, fixed-income investments currently available and expected to be available during the period to maturity of the retirement benefits. The company uses a portfolio of fixed-income securities, which receive at least the second-highest rating given by a recognized ratings agency. Environmental matters The company is responsible for certain environmental matters including environmental investigations and remedial activities related to various facilities formerly owned or operated by the company or its predecessors. The company records an estimated environmental liability when it is probable that a liability has been incurred and the amount is reasonably estimable based primarily on the expected costs of pending investigations, current remediation activities, environmental studies and other estimated costs within the identified sites. The company records a claim for recovery from third parties when its realization is probable. Both the liability and claim for recovery are recorded on a non-discounted basis. Provisions for these matters are difficult to estimate due to unknown environmental conditions, including early stages of investigation in some cases, and changes in governmental laws, regulations and in cleanup technologies. As the company continues to perform investigation activities and if events and circumstances change, the company may incur future additional costs, which could have a material impact on the company’s results of operations, financial condition and cash flows. Noncontrolling interest The company owns a fifty-one percent interest in Intelligent Processing Solutions Ltd. (iPSL), a U.K. business process outsourcing joint venture. The remaining interests, which are reflected as a noncontrolling interest in the company’s consolidated financial statements, are owned by three financial institutions for which iPSL performs services. Revenue recognition Revenue is recognized at an amount that reflects the consideration to which the company expects to be entitled in exchange for transferring goods and services to a customer. The company determines revenue recognition using the following five steps: (1) identify the contract(s) with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) the company satisfies a performance obligation. At contract inception, the company assesses the goods and services promised in a contract with a customer and identifies as a performance obligation each promise to transfer to the customer either: (1) a good or service (or a bundle of goods or services) that is distinct or (2) a series of distinct goods or services that are substantially the same and that have the same pattern of transfer to the customer. The company recognizes revenue only when it satisfies a performance obligation by transferring a promised good or service to a customer. The company must apply its judgment to determine the timing of the satisfaction of performance obligations as well as the transaction price and the amounts allocated to performance obligations including estimating variable consideration, adjusting the consideration for the effects of the time value of money and assessing whether an estimate of variable consideration is constrained. Revenue from hardware sales is recognized upon the transfer of control to a customer, which is defined as an entity’s ability to direct the use of and obtain substantially all of the remaining benefits of an asset. Revenue from software licenses is recognized at the inception of either the initial license term or the inception of an extension or renewal to the license term. Revenue for operating leases is recognized on a monthly basis over the term of the lease and for sales-type leases at the inception of the lease term. Such revenue is not material to the company’s consolidated results of operations. Revenue from equipment and software maintenance and post-contract support is recognized on a straight-line basis as earned over the terms of the respective contracts. Cost related to such contracts is recognized as incurred. Revenue and profit under systems integration contracts are recognized over time as the company transfers control of goods or services. The company measures its progress toward satisfaction of its performance obligations using the cost-to-cost method, or when services have been performed, depending on the nature of the project. For contracts accounted for using the cost-to-cost method, revenue and profit recognized in any given accounting period are based on estimates of total projected contract costs. The estimates are continually reevaluated and revised, when necessary, throughout the life of a contract. Any adjustments to revenue and profit resulting from changes in estimates are accounted for in the period of the change in estimate. When estimates indicate that a loss will be incurred on a contract upon completion, a provision for the expected loss is recorded in the period in which the loss becomes evident. Revenue from such contracts is not material to the company’s consolidated results of operations. In services arrangements, the company typically satisfies the performance obligation and recognizes revenue over time, because the client simultaneously receives and consumes the benefits provided as the company performs the services. The company’s services are provided on a time-and-materials basis, as a fixed-price contract or as a fixed-price per measure of output contract. Revenue from time-and-material contracts is recognized on an output basis as labor hours are delivered. In managed services, application management, business process outsourcing and other cloud-based services arrangements, the arrangement generally consists of a single performance obligation comprised of a series of distinct services that are substantially the same and that have the same pattern of transfer. The company applies a measure of progress (typically time-based) to any fixed consideration and allocates variable consideration to the periods of service, which are typically monthly or quarterly, based on usage. As a result, revenue is recognized over the period the services are provided either on a straight-line basis or on a usage basis, depending on the terms of the arrangement (such as whether the company is standing ready to perform or whether the contract has usage-based metrics). This results in revenue recognition that corresponds with the value to the client of the services transferred to date relative to the remaining services promised. The company also enters into arrangements that may include any combination of hardware, software or services. For example, a client may purchase an enterprise server that includes operating system software. In addition, the arrangement may include post-contract support for the software and a contract for post-warranty maintenance for service of the hardware. These arrangements consist of multiple performance obligations, with control over hardware and software transferred in one reporting period and the software support and hardware maintenance services performed across multiple reporting periods. In another example, the company may provide desktop managed services to a client on a long-term multiple-year basis and periodically sell hardware and license software products to the client. The services are provided on a continuous basis across multiple reporting periods and control over the hardware and software products occurs in one reporting period. The company allocates the total transaction price to be earned under an arrangement among the various performance obligations in proportion to their relative standalone selling prices. The standalone selling price for a performance obligation is the price at which the company would sell a promised good or service separately to a customer. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. For contracts with multiple performance obligations, the company allocates the contract’s transaction price to each performance obligation using its best estimate of the standalone selling price of each distinct good or service in the contract. The primary methods used to estimate standalone selling price are as follows: (1) the expected cost plus margin approach, under which the company forecasts its expected costs of satisfying a performance obligation and then adds an appropriate margin for that distinct good or service and (2) the percent discount off of list price approach. In the Digital Workplace Solutions (DWS) and the Cloud, Applications & Infrastructure Solutions (CA&I) segments, substantially all of the company’s performance obligations are satisfied over time as work progresses and therefore substantially all of the revenue in these segments is recognized over time. The company generally receives payment for these contracts over time as the performance obligations are satisfied. In the Enterprise Computing Solutions (ECS) segment, substantially all of the company’s sales of software and hardware are transferred to customers at a single point in time. Revenue on these contracts is recognized when control over the product is transferred to the customer or a software license term begins. The company generally receives payment for these contracts upon signature or within 30 to 60 days. The company discloses disaggregation of its customer revenue by geographic areas (see Note 20, “Segment information”). The timing of revenue recognition, billings and cash collections results in billed accounts receivable, unbilled receivables, contract assets and deferred revenue (contract liabilities). Revenue excludes taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue producing transaction and collected by the company from a customer (e.g., sales, use and value-added taxes). Revenue includes payments for shipping and handling activities. Advertising costs All advertising costs are expensed as incurred and reported in selling, general and administrative expenses in the consolidated statements of income (loss). The amount charged to the expense during 2023, 2022 and 2021 was $10.7 million, $8.0 million and $3.6 million, respectively. Shipping and handling Costs related to shipping and handling are included in cost of revenue. Stock-based compensation plans Stock-based compensation represents the cost related to stock-based awards granted to employees and directors. Compensation expense for performance-based restricted stock and restricted stock unit awards is recognized as expense ratably for each installment from the date of the grant until the date the restrictions lapse and is based on the fair market value at the date of grant and the probability of achievement of the specific performance-related goals. Compensation expense for market-based awards is recognized as expense ratably over the measurement period, regardless of the actual level of achievement, provided the service requirement is met. The fair value of restricted stock and restricted stock units with time and performance conditions is determined based on the trading price of the company’s common shares on the date of grant. The fair value of awards with market conditions is estimated using a Monte Carlo simulation. The expense is recorded in selling, general and administrative expenses. Income taxes Income taxes are based on income before taxes for financial reporting purposes and reflect a current tax liability for the estimated taxes payable in the current-year tax returns and changes in deferred taxes. Deferred tax assets or liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using enacted tax laws and rates. A valuation allowance is provided on deferred tax assets if it is determined that it is more likely than not that the asset will not be realized. The company releases the income tax effects of deferred tax balances that have a valuation allowance from accumulated other comprehensive income (loss) once the reason the tax effects were established ceases to exist (e.g., a postretirement plan is liquidated). The company recognizes penalties and interest accrued related to income tax liabilities in provision for income taxes in its consolidated statements of income (loss). The company treats the global intangible low-tax income tax, or GILTI, as a period cost when included in U.S. taxable income, and the base erosion and anti-abuse tax, or BEAT, as a period cost when incurred. Translation of foreign currency The local currency is the functional currency for most of the company’s international subsidiaries, and as such, assets and liabilities are translated into U.S. dollars at year-end exchange rates. Income and expense items are translated at average exchange rates during the year. Translation adjustments resulting from changes in exchange rates are reported in other comprehensive income (loss). Exchange gains and losses are reported in other (expense), net. For those international subsidiaries operating in highly inflationary economies, the U.S. dollar is the functional currency, and as such, nonmonetary assets and liabilities are translated at historical exchange rates, and monetary assets and liabilities are translated at current exchange rates. Exchange gains and losses arising from remeasurement are included in other (expense), net. Fair value measurements Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining fair value measurements for assets and liabilities required to be recorded at fair value, the company assumes that the transaction is an orderly transaction that assumes exposure to the market for a period before the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets or liabilities; it is not a forced transaction (for example, a forced liquidation or distress sale). The fair value hierarchy has three levels of inputs that may be used to measure fair value: Level 1 – Quoted prices (unadjusted) in active markets for identical assets or liabilities that the company can access at the measurement date; Level 2 – Inputs other than quoted prices within Level 1 that are observable for the asset or liability, either directly or indirectly; and Level 3 – Unobservable inputs for the asset or liability. The company has applied fair value measurements to its derivatives (see Note 12, “Financial instruments and concentration of credit risks”), long-term debt (see Note 15, “Debt”), and to its postretirement plan assets (see Note 17, “Employee plans”).

Recent accounting pronouncement

Recent accounting pronouncements and accounting changes	12 Months Ended
	Dec. 31, 2023
Accounting Changes and Error Corrections [Abstract]
Recent accounting pronouncements and accounting changes	Recent accounting pronouncements and accounting changes In November 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures , which enhances reportable segment disclosure requirements including disclosures about significant segment expenses on an annual and interim basis. This update is effective for fiscal years beginning after December 15, 2023, and for interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted and requires application on a retrospective basis. This ASU is not expected to have a material effect on the company’s consolidated financial statements. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740) - Improvements to Income Tax Disclosures. This ASU enhances disclosures relating to the rate reconciliation and requires income taxes paid disclosures disaggregated by jurisdiction among other amendments. This update is effective for annual periods beginning after December 15, 2024, with early adoption permitted and should be applied a prospective basis with a retrospective application permitted. This ASU is not expected to have a material effect on the company’s consolidated financial statements.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2023
Business Combination and Asset Acquisition [Abstract]
Acquisitions	Acquisitions CompuGain On December 14, 2021, the company acquired 100% of CompuGain LLC (CompuGain), a leading cloud solutions provider, for a purchase price consideration of $85.3 million on a cash-free, debt-free basis. The company funded the cash consideration and acquisition-related costs with cash on hand. During 2022, the company finalized its valuation of assets acquired and liabilities assumed resulting in measurement period adjustments that decreased goodwill by $27.5 million primarily related to an increase of $27.6 million in the fair value of the acquired intangible assets. During 2022 and 2021, the company incurred and expensed acquisition-related costs of $0.4 million and $1.1 million, respectively, included within selling, general and administrative expense in the consolidated statements of income (loss). The company’s consolidated financial statements include the results of CompuGain commencing as of the acquisition date. Pro forma information and revenue and operating results of CompuGain have not been presented as the impact is not material to the company’s consolidated financial statements. Unify Square, Inc . On June 3, 2021, the company acquired 100% of Unify Square, Inc. (Unify Square) for a purchase price consideration of $150.4 million on a cash-free, debt-free basis. The company funded the cash consideration and acquisition-related costs with cash on hand. During 2021, the company incurred and expensed acquisition-related costs of $2.4 million, included within selling, general and administrative expense in the consolidated statements of income (loss). The company’s consolidated financial statements include the results of Unify Square commencing as of the acquisition date.

Cost-reduction actions

Cost-reduction actions	12 Months Ended
	Dec. 31, 2023
Restructuring and Related Activities [Abstract]
Cost-reduction actions	Cost-reduction actions The company from time to time initiates cost reduction actions designed to improve operating efficiency, reduce costs and align the company’s workforce and facility structures to its overall business plan. During 2023, the company recognized cost-reduction charges and other costs of $9.3 million. The net charges related to workforce reductions were $8.3 million, principally related to severance costs, and were comprised of: (a) a charge of $15.2 million and (b) a credit of $6.9 million for changes in estimates. In addition, the company recorded net charges of $1.0 million comprised of charges of $4.7 million primarily related to professional fees and other expenses related to cost-reduction efforts and a credit of $3.7 million for net foreign currency gains related to exiting foreign countries. During 2022, the company recognized cost-reduction charges and other costs of $54.9 million. The net charges related to workforce reductions were $7.5 million, principally related to severance costs, and were comprised of: (a) a charge of $7.1 million and (b) a charge of $0.4 million for changes in estimates. In addition, the company recorded charges of $47.4 million comprised of charges of $13.6 million related to held-for-sale assets (see Note 13, “Properties” for further details), $10.9 million for asset impairments, $11.3 million for idle leased facilities costs, $9.3 million for contract exit costs, $2.9 million for net foreign currency losses related to exiting foreign countries and a credit of $0.6 million for changes in estimates related to other cost-reduction efforts. During 2021, the company recognized cost-reduction charges and other costs of $23.2 million. The net charges related to workforce reductions were $0.4 million, principally related to severance costs, and were comprised of: (a) a charge of $12.3 million and (b) a credit of $11.9 million for changes in estimates. In addition, the company recorded charges of $22.8 million comprised of $12.6 million for asset impairments, $6.2 million for other expenses related to cost-reduction efforts and $4.0 million for net foreign currency losses related to exiting foreign countries. The charges (credits) were recorded in the following statement of income (loss) classifications: Year ended December 31, 2023 2022 2021 Cost of revenue Services $ 4.9 $ 19.1 $ (2.5) Technology 0.7 7.6 7.6 Selling, general and administrative 6.9 24.7 11.1 Research and development 0.5 0.6 3.0 Other (expenses), net (3.7) 2.9 4.0 Total $ 9.3 $ 54.9 $ 23.2 Liabilities and expected future payments related to the company’s workforce reduction actions are as follows: Total U.S. International Balance at December 31, 2020 $ 55.9 $ 13.1 $ 42.8 Additional provisions 12.3 7.9 4.4 Payments (38.5) (13.2) (25.3) Changes in estimates (11.9) (2.1) (9.8) Translation adjustments (1.5) — (1.5) Balance at December 31, 2021 16.3 5.7 10.6 Additional provisions 7.1 3.6 3.5 Payments (11.5) (4.1) (7.4) Changes in estimates 0.4 (1.0) 1.4 Translation adjustments (0.6) — (0.6) Balance at December 31, 2022 11.7 4.2 7.5 Additional provisions 15.2 3.4 11.8 Payments (10.8) (3.5) (7.3) Changes in estimates (6.9) (1.6) (5.3) Translation adjustments 0.2 — 0.2 Balance at December 31, 2023 $ 9.4 $ 2.5 $ 6.9 Expected future payments on balance at December 31, 2023: In 2024 $ 9.4 $ 2.5 $ 6.9

Leases and commitments

Leases and commitments	12 Months Ended
	Dec. 31, 2023
Leases [Abstract]
Leases and commitments	Leases and commitments Leases The company determines if an arrangement is a lease at inception. This determination generally depends on whether the arrangement conveys to the company the right to control the use of an explicitly or implicitly identified asset for a period of time in exchange for consideration. Control of an underlying asset is conveyed to the company if the company obtains the rights to direct the use of and to obtain substantially all of the economic benefits from using the underlying asset. The company is the lessee in lease agreements that include lease and non-lease components, which the company accounts for as a single lease component for all personal property leases. The company also has lease agreements in which it is the lessor that include lease and non-lease components. For these agreements, the company accounts for these components as a single lease component. Lease expense for variable leases and short-term leases is recognized when the expense is incurred. Operating leases are included in operating lease right-of-use (ROU) assets, other accrued liabilities and long-term operating lease liabilities on the consolidated balance sheets. Operating lease ROU assets and lease liabilities are recognized at the commencement date of the lease based on the present value of lease payments over the lease term. Operating lease payments are recognized as lease expense on a straight-line basis over the lease term. Finance leases are included in outsourcing assets, net and long-term debt on the consolidated balance sheets. Finance lease ROU assets and lease liabilities are initially measured in the same manner as operating leases. Finance lease ROU assets are amortized using the straight-line method. Finance lease liabilities are measured at amortized cost using the effective interest method. The company has not capitalized leases with terms of twelve months or less. As most of the company’s leases do not provide an implicit rate, the company uses its incremental borrowing rate, based on the information available at the lease commencement date, in determining the present value of lease payments. The company determines the incremental borrowing rate using the portfolio approach considering lease term and lease currency. The lease term for all of the company’s leases includes the non-cancelable period of the lease plus any additional periods covered by either a company option to extend (or not to terminate) the lease that the company is reasonably certain to exercise, or an option to extend (or not to terminate) the lease controlled by the lessor. Lease payments included in the measurement of the lease liability are comprised of fixed payments, variable payments that depend on index or rate, amounts expected to be payable under a residual value guarantee and the exercise of the company option to purchase the underlying asset, if reasonably certain. Variable lease payments associated with the company’s leases are recognized when the event, activity, or circumstance in the lease agreement on which those payments are assessed occurs. Variable lease payments are presented as an operating expense in the company’s consolidated results of operations in the same line item as expense arising from fixed lease payments (operating leases) or amortization of the ROU asset (finance leases). The company uses the long-lived assets impairment guidance in ASC Subtopic 360-10 Property, Plant, and Equipment to determine whether a ROU asset is impaired, and if so, the amount of the impairment loss to recognize. If impaired, ROU assets for operating and finance leases are reduced for any impairment losses. The company monitors for events or changes in circumstances that require a reassessment of its leases. When a reassessment results in the remeasurement of a lease liability, a corresponding adjustment is made to the carrying amount of the corresponding ROU asset unless doing so would reduce the carrying amount of the ROU asset to an amount less than zero. In that case, the amount of the adjustment that would result in a negative ROU asset balance is recorded in the consolidated statement of income (loss). The company has commitments under operating leases for certain facilities and equipment used in its operations. The company also has finance leases for equipment. The company’s leases generally have initial lease terms ranging from 1 year to 8 years, most of which include options to extend or renew the leases for up to 5 years, and some of which may include options to terminate the leases within 1 year. Certain lease agreements contain provisions for future rent increases. The components of lease expense are as follows: Year ended December 31, 2023 2022 2021 Operating lease cost $ 26.0 $ 36.7 $ 39.7 Finance lease cost Amortization of right-of-use assets 0.2 1.2 1.8 Interest on lease liabilities — — 0.1 Total finance lease cost 0.2 1.2 1.9 Short-term lease costs 0.7 0.7 0.9 Variable lease cost 10.3 11.6 11.5 Sublease income (1.1) (1.8) (4.4) Total lease cost $ 36.1 $ 48.4 $ 49.6 Supplemental balance sheet information related to leases is as follows: As of December 31, 2023 2022 Operating Leases Operating lease right-of-use assets $ 35.4 $ 42.5 Other accrued liabilities 19.1 26.0 Long-term operating lease liabilities 25.6 29.7 Total operating lease liabilities $ 44.7 $ 55.7 Finance Leases Outsourcing assets, net $ 0.1 $ 0.4 Current maturities of long-term debt 0.3 0.7 Long-term debt — 0.4 Total finance lease liabilities $ 0.3 $ 1.1 Weighted-Average Remaining Lease Term (in years) Operating leases 3.5 2.5 Finance leases 0.5 1.4 Weighted-Average Discount Rate Operating leases 8.3 % 6.7 % Finance leases 5.2 % 5.1 % Supplemental cash flow information related to leases is as follows: Years ended December 31, 2023 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Cash payments for operating leases included in operating activities $ 31.5 $ 41.0 $ 44.9 Cash payments for finance leases included in financing activities 0.2 1.4 1.9 Cash payments for finance lease included in operating activities — — 0.1 ROU assets obtained in exchange for lease obligations are as follows: Years ended December 31, 2023 2022 Operating leases $ 14.7 $ 17.2 Maturities of lease liabilities as of December 31, 2023 are as follows: Year Finance Leases Operating Leases 2024 $ 0.3 $ 22.7 2025 — 12.6 2026 — 9.1 2027 — 3.4 2028 — 2.0 Thereafter — 4.2 Total lease payments 0.3 54.0 Less imputed interest — 9.3 Total $ 0.3 $ 44.7 For transactions where the company is considered the lessor, revenue for operating leases is recognized on a monthly basis over the term of the lease and for sales-type leases at the inception of the lease term. As of December 31, 2023, receivables under sales-type leases before the allowance for unearned income were collectible as follows: Year 2024 $ 8.7 2025 19.4 2026 2.7 2027 0.7 2028 — Thereafter — Total $ 31.5 Other Commitments At December 31, 2023, the company had outstanding standby letters of credit and surety bonds totaling approximately $232 million related to performance and payment guarantees. On the basis of experience with these arrangements, the company believes that any obligations that may arise will not be material. In addition, at December 31, 2023, the company had deposits and collateral of approximately $8 million in other long-term assets, principally related to tax contingencies in Brazil.
Leases and commitments	Leases and commitments Leases The company determines if an arrangement is a lease at inception. This determination generally depends on whether the arrangement conveys to the company the right to control the use of an explicitly or implicitly identified asset for a period of time in exchange for consideration. Control of an underlying asset is conveyed to the company if the company obtains the rights to direct the use of and to obtain substantially all of the economic benefits from using the underlying asset. The company is the lessee in lease agreements that include lease and non-lease components, which the company accounts for as a single lease component for all personal property leases. The company also has lease agreements in which it is the lessor that include lease and non-lease components. For these agreements, the company accounts for these components as a single lease component. Lease expense for variable leases and short-term leases is recognized when the expense is incurred. Operating leases are included in operating lease right-of-use (ROU) assets, other accrued liabilities and long-term operating lease liabilities on the consolidated balance sheets. Operating lease ROU assets and lease liabilities are recognized at the commencement date of the lease based on the present value of lease payments over the lease term. Operating lease payments are recognized as lease expense on a straight-line basis over the lease term. Finance leases are included in outsourcing assets, net and long-term debt on the consolidated balance sheets. Finance lease ROU assets and lease liabilities are initially measured in the same manner as operating leases. Finance lease ROU assets are amortized using the straight-line method. Finance lease liabilities are measured at amortized cost using the effective interest method. The company has not capitalized leases with terms of twelve months or less. As most of the company’s leases do not provide an implicit rate, the company uses its incremental borrowing rate, based on the information available at the lease commencement date, in determining the present value of lease payments. The company determines the incremental borrowing rate using the portfolio approach considering lease term and lease currency. The lease term for all of the company’s leases includes the non-cancelable period of the lease plus any additional periods covered by either a company option to extend (or not to terminate) the lease that the company is reasonably certain to exercise, or an option to extend (or not to terminate) the lease controlled by the lessor. Lease payments included in the measurement of the lease liability are comprised of fixed payments, variable payments that depend on index or rate, amounts expected to be payable under a residual value guarantee and the exercise of the company option to purchase the underlying asset, if reasonably certain. Variable lease payments associated with the company’s leases are recognized when the event, activity, or circumstance in the lease agreement on which those payments are assessed occurs. Variable lease payments are presented as an operating expense in the company’s consolidated results of operations in the same line item as expense arising from fixed lease payments (operating leases) or amortization of the ROU asset (finance leases). The company uses the long-lived assets impairment guidance in ASC Subtopic 360-10 Property, Plant, and Equipment to determine whether a ROU asset is impaired, and if so, the amount of the impairment loss to recognize. If impaired, ROU assets for operating and finance leases are reduced for any impairment losses. The company monitors for events or changes in circumstances that require a reassessment of its leases. When a reassessment results in the remeasurement of a lease liability, a corresponding adjustment is made to the carrying amount of the corresponding ROU asset unless doing so would reduce the carrying amount of the ROU asset to an amount less than zero. In that case, the amount of the adjustment that would result in a negative ROU asset balance is recorded in the consolidated statement of income (loss). The company has commitments under operating leases for certain facilities and equipment used in its operations. The company also has finance leases for equipment. The company’s leases generally have initial lease terms ranging from 1 year to 8 years, most of which include options to extend or renew the leases for up to 5 years, and some of which may include options to terminate the leases within 1 year. Certain lease agreements contain provisions for future rent increases. The components of lease expense are as follows: Year ended December 31, 2023 2022 2021 Operating lease cost $ 26.0 $ 36.7 $ 39.7 Finance lease cost Amortization of right-of-use assets 0.2 1.2 1.8 Interest on lease liabilities — — 0.1 Total finance lease cost 0.2 1.2 1.9 Short-term lease costs 0.7 0.7 0.9 Variable lease cost 10.3 11.6 11.5 Sublease income (1.1) (1.8) (4.4) Total lease cost $ 36.1 $ 48.4 $ 49.6 Supplemental balance sheet information related to leases is as follows: As of December 31, 2023 2022 Operating Leases Operating lease right-of-use assets $ 35.4 $ 42.5 Other accrued liabilities 19.1 26.0 Long-term operating lease liabilities 25.6 29.7 Total operating lease liabilities $ 44.7 $ 55.7 Finance Leases Outsourcing assets, net $ 0.1 $ 0.4 Current maturities of long-term debt 0.3 0.7 Long-term debt — 0.4 Total finance lease liabilities $ 0.3 $ 1.1 Weighted-Average Remaining Lease Term (in years) Operating leases 3.5 2.5 Finance leases 0.5 1.4 Weighted-Average Discount Rate Operating leases 8.3 % 6.7 % Finance leases 5.2 % 5.1 % Supplemental cash flow information related to leases is as follows: Years ended December 31, 2023 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Cash payments for operating leases included in operating activities $ 31.5 $ 41.0 $ 44.9 Cash payments for finance leases included in financing activities 0.2 1.4 1.9 Cash payments for finance lease included in operating activities — — 0.1 ROU assets obtained in exchange for lease obligations are as follows: Years ended December 31, 2023 2022 Operating leases $ 14.7 $ 17.2 Maturities of lease liabilities as of December 31, 2023 are as follows: Year Finance Leases Operating Leases 2024 $ 0.3 $ 22.7 2025 — 12.6 2026 — 9.1 2027 — 3.4 2028 — 2.0 Thereafter — 4.2 Total lease payments 0.3 54.0 Less imputed interest — 9.3 Total $ 0.3 $ 44.7 For transactions where the company is considered the lessor, revenue for operating leases is recognized on a monthly basis over the term of the lease and for sales-type leases at the inception of the lease term. As of December 31, 2023, receivables under sales-type leases before the allowance for unearned income were collectible as follows: Year 2024 $ 8.7 2025 19.4 2026 2.7 2027 0.7 2028 — Thereafter — Total $ 31.5 Other Commitments At December 31, 2023, the company had outstanding standby letters of credit and surety bonds totaling approximately $232 million related to performance and payment guarantees. On the basis of experience with these arrangements, the company believes that any obligations that may arise will not be material. In addition, at December 31, 2023, the company had deposits and collateral of approximately $8 million in other long-term assets, principally related to tax contingencies in Brazil.
Leases and commitments	Leases and commitments Leases The company determines if an arrangement is a lease at inception. This determination generally depends on whether the arrangement conveys to the company the right to control the use of an explicitly or implicitly identified asset for a period of time in exchange for consideration. Control of an underlying asset is conveyed to the company if the company obtains the rights to direct the use of and to obtain substantially all of the economic benefits from using the underlying asset. The company is the lessee in lease agreements that include lease and non-lease components, which the company accounts for as a single lease component for all personal property leases. The company also has lease agreements in which it is the lessor that include lease and non-lease components. For these agreements, the company accounts for these components as a single lease component. Lease expense for variable leases and short-term leases is recognized when the expense is incurred. Operating leases are included in operating lease right-of-use (ROU) assets, other accrued liabilities and long-term operating lease liabilities on the consolidated balance sheets. Operating lease ROU assets and lease liabilities are recognized at the commencement date of the lease based on the present value of lease payments over the lease term. Operating lease payments are recognized as lease expense on a straight-line basis over the lease term. Finance leases are included in outsourcing assets, net and long-term debt on the consolidated balance sheets. Finance lease ROU assets and lease liabilities are initially measured in the same manner as operating leases. Finance lease ROU assets are amortized using the straight-line method. Finance lease liabilities are measured at amortized cost using the effective interest method. The company has not capitalized leases with terms of twelve months or less. As most of the company’s leases do not provide an implicit rate, the company uses its incremental borrowing rate, based on the information available at the lease commencement date, in determining the present value of lease payments. The company determines the incremental borrowing rate using the portfolio approach considering lease term and lease currency. The lease term for all of the company’s leases includes the non-cancelable period of the lease plus any additional periods covered by either a company option to extend (or not to terminate) the lease that the company is reasonably certain to exercise, or an option to extend (or not to terminate) the lease controlled by the lessor. Lease payments included in the measurement of the lease liability are comprised of fixed payments, variable payments that depend on index or rate, amounts expected to be payable under a residual value guarantee and the exercise of the company option to purchase the underlying asset, if reasonably certain. Variable lease payments associated with the company’s leases are recognized when the event, activity, or circumstance in the lease agreement on which those payments are assessed occurs. Variable lease payments are presented as an operating expense in the company’s consolidated results of operations in the same line item as expense arising from fixed lease payments (operating leases) or amortization of the ROU asset (finance leases). The company uses the long-lived assets impairment guidance in ASC Subtopic 360-10 Property, Plant, and Equipment to determine whether a ROU asset is impaired, and if so, the amount of the impairment loss to recognize. If impaired, ROU assets for operating and finance leases are reduced for any impairment losses. The company monitors for events or changes in circumstances that require a reassessment of its leases. When a reassessment results in the remeasurement of a lease liability, a corresponding adjustment is made to the carrying amount of the corresponding ROU asset unless doing so would reduce the carrying amount of the ROU asset to an amount less than zero. In that case, the amount of the adjustment that would result in a negative ROU asset balance is recorded in the consolidated statement of income (loss). The company has commitments under operating leases for certain facilities and equipment used in its operations. The company also has finance leases for equipment. The company’s leases generally have initial lease terms ranging from 1 year to 8 years, most of which include options to extend or renew the leases for up to 5 years, and some of which may include options to terminate the leases within 1 year. Certain lease agreements contain provisions for future rent increases. The components of lease expense are as follows: Year ended December 31, 2023 2022 2021 Operating lease cost $ 26.0 $ 36.7 $ 39.7 Finance lease cost Amortization of right-of-use assets 0.2 1.2 1.8 Interest on lease liabilities — — 0.1 Total finance lease cost 0.2 1.2 1.9 Short-term lease costs 0.7 0.7 0.9 Variable lease cost 10.3 11.6 11.5 Sublease income (1.1) (1.8) (4.4) Total lease cost $ 36.1 $ 48.4 $ 49.6 Supplemental balance sheet information related to leases is as follows: As of December 31, 2023 2022 Operating Leases Operating lease right-of-use assets $ 35.4 $ 42.5 Other accrued liabilities 19.1 26.0 Long-term operating lease liabilities 25.6 29.7 Total operating lease liabilities $ 44.7 $ 55.7 Finance Leases Outsourcing assets, net $ 0.1 $ 0.4 Current maturities of long-term debt 0.3 0.7 Long-term debt — 0.4 Total finance lease liabilities $ 0.3 $ 1.1 Weighted-Average Remaining Lease Term (in years) Operating leases 3.5 2.5 Finance leases 0.5 1.4 Weighted-Average Discount Rate Operating leases 8.3 % 6.7 % Finance leases 5.2 % 5.1 % Supplemental cash flow information related to leases is as follows: Years ended December 31, 2023 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Cash payments for operating leases included in operating activities $ 31.5 $ 41.0 $ 44.9 Cash payments for finance leases included in financing activities 0.2 1.4 1.9 Cash payments for finance lease included in operating activities — — 0.1 ROU assets obtained in exchange for lease obligations are as follows: Years ended December 31, 2023 2022 Operating leases $ 14.7 $ 17.2 Maturities of lease liabilities as of December 31, 2023 are as follows: Year Finance Leases Operating Leases 2024 $ 0.3 $ 22.7 2025 — 12.6 2026 — 9.1 2027 — 3.4 2028 — 2.0 Thereafter — 4.2 Total lease payments 0.3 54.0 Less imputed interest — 9.3 Total $ 0.3 $ 44.7 For transactions where the company is considered the lessor, revenue for operating leases is recognized on a monthly basis over the term of the lease and for sales-type leases at the inception of the lease term. As of December 31, 2023, receivables under sales-type leases before the allowance for unearned income were collectible as follows: Year 2024 $ 8.7 2025 19.4 2026 2.7 2027 0.7 2028 — Thereafter — Total $ 31.5 Other Commitments At December 31, 2023, the company had outstanding standby letters of credit and surety bonds totaling approximately $232 million related to performance and payment guarantees. On the basis of experience with these arrangements, the company believes that any obligations that may arise will not be material. In addition, at December 31, 2023, the company had deposits and collateral of approximately $8 million in other long-term assets, principally related to tax contingencies in Brazil.

Other (expense), net

Other (expense), net	12 Months Ended
	Dec. 31, 2023
Other Income and Expenses [Abstract]
Other (expense), net	Other (expense), net Other (expense), net is comprised of the following: Year ended December 31, 2023 2022 2021 Postretirement expense* $ (387.1) $ (43.2) $ (548.6) Foreign exchange losses** (0.2) (6.8) (2.5) Environmental costs and other, net*** (6.6) (32.4) (29.2) Total other (expense), net $ (393.9) $ (82.4) $ (580.3) *Includes $348.9 million of settlement losses in 2023 and $499.4 million of settlement losses in 2021 related to the company’s defined benefit pension plans. See Note 17, “Employee plans.” **Includes (credits) charges of $(3.7) million, $2.9 million and $4.0 million respectively, in 2023, 2022 and 2021 for net foreign currency (gains) losses related to substantial completion of liquidation of foreign subsidiaries. ***Environmental costs relate to previously disposed businesses.

Income taxes

Income taxes	12 Months Ended
	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Income taxes	Income taxes Following is the total loss before income taxes and the provision (benefit) for income taxes. Year ended December 31, 2023 2022 2021 Income (loss) before income taxes United States $ (545.5) $ (177.2) $ (443.5) Foreign 197.7 114.6 (18.2) Total loss before income taxes $ (347.8) $ (62.6) $ (461.7) Provision (benefit) for income taxes Current United States $ 8.8 $ 15.9 $ 9.1 Foreign 46.0 34.7 38.1 Total 54.8 50.6 47.2 Deferred Foreign 24.5 (8.3) (59.1) Total provision (benefit) for income taxes $ 79.3 $ 42.3 $ (11.9) Following is a reconciliation of the benefit for income taxes at the United States statutory tax rate to the provision (benefit) for income taxes as reported: Year ended December 31, 2023 2022 2021 United States statutory income tax benefit $ (73.0) $ (13.2) $ (96.9) Income and losses for which no provision or benefit has been recognized 123.2 40.9 91.1 Foreign rate differential and other foreign tax expense 12.7 6.4 0.4 Income tax withholdings 14.0 19.7 13.5 Permanent items (3.0) (2.1) (1.8) Change in uncertain tax positions 3.8 0.4 (0.3) Change in valuation allowances 2.1 (9.8) (0.8) U.S. income tax benefit (0.6) — — Other 0.1 — — Enacted rate changes — — (17.1) Provision (benefit) for income taxes $ 79.3 $ 42.3 $ (11.9) The tax effects of temporary differences and carryforwards that give rise to significant portions of deferred tax assets and liabilities were as follows: As of December 31, 2023 2022 Deferred tax assets Tax loss carryforwards $ 813.0 $ 825.5 Postretirement benefits 183.0 149.6 Foreign tax credit carryforwards 83.6 109.2 Other tax credit carryforwards 29.1 32.7 Deferred revenue 31.9 28.2 Employee benefits and compensation 31.5 21.2 Purchased capitalized software 19.4 16.9 Depreciation 33.0 32.6 Warranty, bad debts and other reserves 7.6 7.1 Capitalized costs 9.0 6.2 Other 57.6 49.9 1,298.7 1,279.1 Valuation allowance (1,150.1) (1,110.5) Total deferred tax assets $ 148.6 $ 168.6 Deferred tax liabilities Capitalized research and development $ 10.4 $ 31.0 Other 25.1 29.2 Total deferred tax liabilities $ 35.5 $ 60.2 Net deferred tax assets $ 113.1 $ 108.4 Changes in the valuation allowance was as follows: Year ended December 31, 2023 2022 2021 Valuation allowance, at beginning of year $ (1,110.5) $ (1,226.2) $ (1,271.5) Actuarial pension adjustments 84.5 70.7 99.5 Expired net operating losses/tax credits 42.9 52.3 50.0 Foreign exchange (6.8) 14.8 18.4 Recognition of income tax benefit (expense) (i) (125.9) (43.9) (102.1) Other (34.3) 21.8 (20.5) Valuation allowance, at end of year $ (1,150.1) $ (1,110.5) $ (1,226.2) (i) Includes U.S. pension activity of $(95.9) million, ($11.3) million and ($84.9) million for the years ended December 31, 2023, 2022 and 2021, respectively. The company has tax effected tax loss carryforwards as follows: As of December 31, 2023 U.S. Federal $ 366.0 State and local 180.2 Foreign 266.8 Total tax loss carryforwards $ 813.0 These carryforwards will expire as follows: Year 2024 $ 13.4 2025 20.8 2026 15.6 2027 40.8 2028 93.1 Thereafter 358.2 Unlimited 271.1 Total $ 813.0 The company also has available tax credit carryforwards, which will expire as follows: Year 2024 $ 22.5 2025 20.7 2026 33.7 2027 9.1 2028 0.3 Thereafter 26.4 Total $ 112.7 A full valuation allowance is currently maintained for all U.S. and certain foreign deferred tax assets in excess of deferred tax liabilities. The company will record a tax provision or benefit for those international subsidiaries that do not have a full valuation allowance against their net deferred tax assets. Any profit or loss recorded for the company’s U.S. operations will have no provision or benefit associated with it due to such valuation allowance, except with respect to withholding taxes not creditable against future taxable income. As a result, the company’s provision or benefit for taxes may vary significantly depending on the geographic distribution of income. The realization of the company’s net deferred tax assets as of December 31, 2023, is primarily dependent on the ability to generate sustained taxable income in various jurisdictions. Judgment is required to estimate forecasted future taxable income, which may be impacted by future business developments, actual results, strategic operational and tax initiatives, legislative, and other economic factors and developments. Any increase or decrease in the valuation allowance would result in additional or lower income tax expense in that period and could have a significant impact on that period’s earnings. During 2023, the company determined that a portion of its non-U.S. net deferred tax assets required an additional valuation allowance. The net change in the valuation allowance impacting the effective tax rate in 2023 was approximately $2.1 million, primarily in Latin America. During 2022, the company determined that a portion of its non-U.S. net deferred tax assets no longer required a valuation allowance. The net change in the valuation allowances impacting the effective tax rate in 2022 was approximately $9.8 million of a tax benefit, primarily in the United Kingdom and other foreign jurisdictions. Under U.S. tax law, distributions from foreign subsidiaries to U.S. shareholders are generally exempt from taxation. Consequently, the deferred income tax liability on undistributed earnings is generally limited to any foreign withholding or other foreign taxes that will be imposed on such distributions. As the company currently intends to indefinitely reinvest the earnings of certain foreign subsidiaries, no provision has been made for income taxes that may become payable upon distribution of the earnings of such subsidiaries. The unrecognized deferred income tax liability at December 31, 2023 approximated $32.2 million. Cash paid for income taxes, net of refunds was as follows: Year ended December 31, 2023 2022 2021 Cash paid for income taxes, net of refunds $ 63.4 $ 49.0 $ 53.7 A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows: Year ended December 31, 2023 2022 2021 Balance at January 1 $ 17.8 $ 21.6 $ 30.9 Additions based on tax positions related to the current year 4.6 1.9 3.5 Changes for tax positions of prior years 2.6 1.2 (8.8) Reductions as a result of a lapse of applicable statute of limitations (4.6) (5.4) (2.6) Settlements — — (0.3) Changes due to foreign currency 0.5 (1.5) (1.1) Balance at December 31 $ 20.9 $ 17.8 $ 21.6 The company recognizes penalties and interest accrued related to income tax liabilities in the provision for income taxes in its consolidated statements of income (loss). At December 31, 2023 and 2022, the company had an accrual of $4.6 million and $3.8 million, respectively, for the payment of penalties and interest. At December 31, 2023, all of the company’s liability for unrecognized tax benefits, if recognized, would affect the company’s effective tax rate. Within the next 12 months, the company believes that it is reasonably possible that the amount of unrecognized tax benefits may decrease by $1.3 million related to a statute of limitation expiration; however, various events could cause this belief to change in the future. The company and its subsidiaries file income tax returns in the U.S. federal jurisdiction, and various states and foreign jurisdictions. The company is currently undergoing audits in several of its foreign jurisdictions. Ongoing income tax audits throughout the world are not expected to have a material impact on the company’s financial position. Internal Revenue Code Sections 382 and 383 provide annual limitations with respect to the ability of a corporation to utilize its net operating loss (as well as certain built-in losses) and tax credit carryforwards, respectively (Tax Attributes), against future U.S. taxable income, if the corporation experiences an “ownership change.” In general terms, an ownership change may result from transactions increasing the ownership of certain stockholders in the stock of a corporation by more than 50 percentage points over a three-year period. The company regularly monitors ownership changes (as calculated for purposes of Section 382). The company has determined that, for purposes of the rules of Section 382 described above, an ownership change occurred in 2011. Any future transaction or transactions and the timing of such transaction or transactions could trigger additional ownership changes under Section 382.

Earnings (loss) per common shar

Earnings (loss) per common share	12 Months Ended
	Dec. 31, 2023
Earnings Per Share [Abstract]
Earnings (loss) per common share	Earnings (loss) per common share The following table shows how loss per common share attributable to Unisys Corporation was computed for the three years ended December 31, 2023 (shares in thousands). Year ended December 31, 2023 2022 2021 Basic loss per common share computation: Net loss attributable to Unisys Corporation $ (430.7) $ (106.0) $ (448.5) Weighted average shares 68,254 67,665 66,451 Basic loss per common share $ (6.31) $ (1.57) $ (6.75) Diluted loss per common share computation: Net loss attributable to Unisys Corporation $ (430.7) $ (106.0) $ (448.5) Weighted average shares 68,254 67,665 66,451 Plus incremental shares from assumed conversions of employee stock plans — — — Adjusted weighted average shares 68,254 67,665 66,451 Diluted loss per common share $ (6.31) $ (1.57) $ (6.75) Anti-dilutive weighted-average restricted stock units (i) 945 481 871 Anti-dilutive weighted-average common shares issuable upon conversion of the 5.50% convertible senior notes (i) (see Note 15, “Debt”) — — 557 (i) Amounts represent shares excluded from the computation of diluted earnings per share, as their effect, if included, would have been anti-dilutive for the periods presented.

Accounts receivable

Accounts receivable	12 Months Ended
	Dec. 31, 2023
Receivables [Abstract]
Accounts receivable	Accounts receivable Accounts receivable consist principally of trade accounts receivable from customers and are generally unsecured and due within 30 to 90 days. Credit losses relating to these receivables consistently have been within management’s expectations. Expected credit losses are recorded as an allowance for credit losses in the consolidated balance sheets. Estimates of expected credit losses are based primarily on the aging of the accounts receivable balances. The company records a specific reserve for individual accounts when it becomes aware of a customer’s inability to meet its financial obligations, such as in the case of bankruptcy filings or deterioration in the customer’s operating results or financial position. The collection policies and procedures of the company vary by credit class and prior payment history of customers. Revenue recognized in excess of billings on services contracts, or unbilled accounts receivable, was $93.9 million and $87.9 million at December 31, 2023 and 2022, respectively. Unearned income, which is reported as a deduction from accounts receivable, was $9.0 million and $13.9 million at December 31, 2023 and 2022, respectively. The allowance for credit losses, which is reported as a deduction from accounts receivable, was $9.5 million and $9.1 million at December 31, 2023 and 2022, respectively. The provision for credit losses, which is reported in selling, general and administrative expenses in the consolidated statements of income (loss), was expense (income) of $(0.2) million, $0.3 million and $(0.6) million, in 2023, 2022 and 2021, respectively. Additionally, long-term receivables were $70.3 million and $85.3 million at December 31, 2023 and 2022, respectively, and are reported in other long-term assets on the company’s consolidated balance sheets.

Contract assets and deferred re

Contract assets and deferred revenue	12 Months Ended
	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Contract assets and deferred revenue	Contract assets and deferred revenue Contract assets represent rights to consideration in exchange for goods or services transferred to a customer when that right is conditional on something other than the passage of time. Deferred revenue represents contract liabilities. Net contract assets (liabilities) are as follows: As of December 31, 2023 2022 Contract assets - current $ 11.7 $ 28.9 Contract assets - long-term (i) 8.6 11.0 Deferred revenue - current (198.6) (200.7) Deferred revenue - long-term (104.4) (122.3) (i) Reported in other long-term assets on the company’s consolidated balance sheets. Significant changes in the above contract liability balances were as follows: Year ended December 31, 2023 2022 Revenue recognized that was included in deferred revenue at the beginning of the period $ 198.9 $ 235.4 The company’s incremental direct costs of obtaining a contract consist of sales commissions which are deferred and amortized ratably over the initial contract life. These costs are classified as current or noncurrent based on the timing of when the company expects to recognize the expense. The current and noncurrent portions of deferred commissions are included in prepaid expenses, other current assets and in other long-term assets, respectively, in the company’s consolidated balance sheets. Deferred commissions were as follows: As of December 31, 2023 2022 Deferred commissions $ 3.7 $ 4.9 Amortization expense related to deferred commissions was as follows: Year ended December 31, 2023 2022 2021 Deferred commissions - amortization expense (i) $ 1.5 $ 2.9 $ 2.9 (i) Reported in selling, general and administrative expense in the company’s consolidated statements of income (loss). Costs on outsourcing contracts are generally expensed as incurred. However, certain costs incurred upon initiation of an outsourcing contract (costs to fulfill a contract), principally initial customer setup, are capitalized and expensed over the initial contract life. These costs are included in outsourcing assets, net in the company’s consolidated balance sheets, and are amortized over the initial contract life and reported in cost of revenue. Costs to fulfill a contract were as follows: As of December 31, 2023 2022 Costs to fulfill a contract $ 19.2 $ 34.8 Amortization expense related to costs to fulfill a contract was as follows: Year ended December 31, 2023 2022 2021 Costs to fulfill a contract - amortization expense $ 6.7 $ 23.7 $ 27.9 The remaining balance of outsourcing assets, net is comprised of fixed assets and software used in connection with outsourcing contracts. These costs are capitalized and depreciated over the shorter of the initial contract life or in accordance with the company’s fixed asset policy.

Capitalized contract costs

Capitalized contract costs	12 Months Ended
	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Capitalized contract costs	Contract assets and deferred revenue Contract assets represent rights to consideration in exchange for goods or services transferred to a customer when that right is conditional on something other than the passage of time. Deferred revenue represents contract liabilities. Net contract assets (liabilities) are as follows: As of December 31, 2023 2022 Contract assets - current $ 11.7 $ 28.9 Contract assets - long-term (i) 8.6 11.0 Deferred revenue - current (198.6) (200.7) Deferred revenue - long-term (104.4) (122.3) (i) Reported in other long-term assets on the company’s consolidated balance sheets. Significant changes in the above contract liability balances were as follows: Year ended December 31, 2023 2022 Revenue recognized that was included in deferred revenue at the beginning of the period $ 198.9 $ 235.4 The company’s incremental direct costs of obtaining a contract consist of sales commissions which are deferred and amortized ratably over the initial contract life. These costs are classified as current or noncurrent based on the timing of when the company expects to recognize the expense. The current and noncurrent portions of deferred commissions are included in prepaid expenses, other current assets and in other long-term assets, respectively, in the company’s consolidated balance sheets. Deferred commissions were as follows: As of December 31, 2023 2022 Deferred commissions $ 3.7 $ 4.9 Amortization expense related to deferred commissions was as follows: Year ended December 31, 2023 2022 2021 Deferred commissions - amortization expense (i) $ 1.5 $ 2.9 $ 2.9 (i) Reported in selling, general and administrative expense in the company’s consolidated statements of income (loss). Costs on outsourcing contracts are generally expensed as incurred. However, certain costs incurred upon initiation of an outsourcing contract (costs to fulfill a contract), principally initial customer setup, are capitalized and expensed over the initial contract life. These costs are included in outsourcing assets, net in the company’s consolidated balance sheets, and are amortized over the initial contract life and reported in cost of revenue. Costs to fulfill a contract were as follows: As of December 31, 2023 2022 Costs to fulfill a contract $ 19.2 $ 34.8 Amortization expense related to costs to fulfill a contract was as follows: Year ended December 31, 2023 2022 2021 Costs to fulfill a contract - amortization expense $ 6.7 $ 23.7 $ 27.9 The remaining balance of outsourcing assets, net is comprised of fixed assets and software used in connection with outsourcing contracts. These costs are capitalized and depreciated over the shorter of the initial contract life or in accordance with the company’s fixed asset policy.

Financial instruments and conce

Financial instruments and concentration of credit risks	12 Months Ended
	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Financial instruments and concentration of credit risks	Financial instruments and concentration of credit risks Due to its foreign operations, the company is exposed to the effects of foreign currency exchange rate fluctuations on the U.S. dollar, principally related to intercompany account balances. The company uses derivative financial instruments to reduce its exposure to market risks from changes in foreign currency exchange rates on such balances. The company enters into foreign exchange forward contracts, generally having maturities of three months or less, which have not been designated as hedging instruments. At December 31, 2023 and 2022, the notional amount of these contracts was $488.4 million and $533.5 million, respectively. The fair value of these forward contracts is based on quoted prices for similar but not identical financial instruments; as such, the inputs are considered Level 2 inputs. The following table summarizes the fair value of the company’s foreign exchange forward contracts. As of December 31, 2023 2022 Balance Sheet Location Prepaid expenses and other current assets $ 9.0 $ 7.9 Other accrued liabilities 0.1 1.3 Total fair value $ 8.9 $ 6.6 The following table summarizes the location and amount of gains (losses) recognized on foreign exchange forward contracts. Year Ended December 31, 2023 2022 2021 Statement of Income Location Other (expense), net $ 13.5 $ (39.3) $ (18.8) Other financial instruments include temporary cash investments and customer accounts receivable. Temporary investments are placed with creditworthy financial institutions, primarily in money market funds, time deposits and certificate of deposits, which may be withdrawn at any time at the discretion of the company without penalty. At December 31, 2023 and 2022, the company’s cash equivalents principally have maturities of less than one month or can be withdrawn at any time at the discretion of the company without penalty. Due to the short maturities of these instruments, they are carried on the consolidated balance sheets at cost plus accrued interest, which approximates fair value. Receivables are due from a large number of customers that are dispersed worldwide across many industries. At December 31, 2023 and 2022, the company had no significant concentrations of credit risk with any one customer.

Properties

Properties	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Properties	Properties Properties comprise the following: As of December 31, 2023 2022 Buildings $ 0.3 $ 0.3 Machinery and office equipment 211.5 232.6 Internal-use software 177.1 170.9 Rental equipment 7.5 7.0 Total properties $ 396.4 $ 410.8 Long-lived assets to be sold are classified as held-for-sale in the period in which they meet all the criteria for the disposal of long-lived assets. The company measures assets held-for-sale at the lower of their carrying amount or fair value less cost to sell. In 2021, the company determined that its data center facility located in Eagan, Minnesota, met the criteria for classification of the related assets as held-for-sale. Since the assets have been held-for-sale for more than a year, the company evaluates whether (i) the company has taken all necessary actions to respond to the change in circumstances; (ii) the company is actively marketing the data center facility at a price that is reasonable; and (iii) the company continues to meet all of the criteria to continue to classify the assets as held-for-sale. During 2022, the company recognized an asset held-for-sale write-down of $13.6 million, reducing the assets to its estimated current fair market value less costs to sell. The valuation report was considered a Level 2 input. The company is actively marketing this facility for sale and continues to identify interested parties. The company believes the classification continues to be appropriate and that all the criteria has been met to classify these assets as held-for-sale at December 31, 2023.

Goodwill and intangible assets

Goodwill and intangible assets	12 Months Ended
	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and intangible assets	Goodwill and intangible assets Goodwill Changes in the carrying amount of goodwill by reporting unit were as follows: Total DWS CA&I ECS Other Balance at December 31, 2021 $ 315.0 $ 140.9 $ 65.5 $ 98.3 $ 10.3 Acquisition - Measurement period adjustments (i) (27.5) — (27.5) — — Translation adjustments (0.4) (0.4) — — — Balance at December 31, 2022 287.1 140.5 38.0 98.3 10.3 Translation adjustments 0.3 0.3 — — — Balance at December 31, 2023 $ 287.4 $ 140.8 $ 38.0 $ 98.3 $ 10.3 (i) Includes a measurement period adjustment that decreased goodwill by $27.5 million related to a prior period acquisition. At December 31, 2023, the amount of goodwill allocated to reporting units with negative net assets within Other was $10.3 million. At December 31, 2022, there was no goodwill allocated to reporting units with negative net assets. Intangible Assets, Net Intangible assets, net at December 31, 2023 and 2022 consists of the following: As of December 31, 2023 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Technology (i) $ 10.0 $ 8.1 $ 1.9 Customer relationships (ii) 54.2 14.1 40.1 Marketing (ii) 1.3 0.6 0.7 Total $ 65.5 $ 22.8 $ 42.7 As of December 31, 2022 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Technology (i) $ 10.0 $ 4.9 $ 5.1 Customer relationships (ii)(iii) 54.2 7.9 46.3 Marketing (ii) 1.3 0.3 1.0 Total $ 65.5 $ 13.1 $ 52.4 (i) Amortization expense is included within cost of revenue - technology in the consolidated statements of income (loss). (ii) Amortization expense is included within selling, general and administrative expense in the consolidated statements of income (loss). (iii) Customer relationships include a measurement period adjustment that increased the fair value of the acquired intangible assets by $27.6 million related to a prior period acquisition. Amortization expense was $9.7 million, $10.1 million and $3.0 million for the years ended December 31, 2023, 2022 and 2021, respectively. The future amortization relating to acquired intangible assets at December 31, 2023 was estimated as follows: Year Future Amortization Expense 2024 $ 7.2 2025 4.3 2026 4.0 2027 4.0 2028 4.0 Thereafter 19.2 Total $ 42.7

Debt

Debt	12 Months Ended
	Dec. 31, 2023
Debt Disclosure [Abstract]
Debt	Debt Long-term debt is comprised of the following: As of December 31, 2023 2022 6.875% senior secured notes due November 1, 2027 (Face value of $485.0 million less unamortized issuance costs of $4.6 million and $5.8 million at December 31, 2023 and 2022, respectively) $ 480.4 $ 479.2 Finance leases 0.3 1.1 Other debt 23.5 32.8 Total 504.2 513.1 Less – current maturities 13.0 17.4 Total long-term debt $ 491.2 $ 495.7 Long-term debt is carried at amortized cost and its estimated fair value is based on market prices classified as Level 2 in the fair value hierarchy. Presented below are the estimated fair values of long-term debt. As of December 31, 2023 2022 6.875% senior secured notes due November 1, 2027 $ 437.5 $ 373.0 The company’s principal sources of liquidity are cash on hand, cash from operations and its Amended and Restated ABL Credit Facility, discussed below. The company and certain international subsidiaries have access to uncommitted lines of credit from various banks. At December 31, 2023, the company had met all covenants and conditions under its various lending agreements. The company expects to continue to meet these covenants and conditions through at least the next twelve months. Maturities of long-term debt, including finance leases, in each of the next five years and thereafter are as follows: Year Total Long-Term Debt Finance Leases 2024 $ 13.0 $ 12.7 $ 0.3 2025 6.6 6.6 — 2026 3.3 3.3 — 2027 481.3 481.3 — Total $ 504.2 $ 503.9 $ 0.3 Cash paid for interest and capitalized interest expense was as follows: Year ended December 31, 2023 2022 2021 Cash paid for interest $ 35.5 $ 36.5 $ 40.1 Capitalized interest expense $ 5.7 $ 5.1 $ 4.5 Senior Secured Notes due 2027 The company has outstanding $485.0 million aggregate principal amount of its 6.875% Senior Secured Notes due 2027 (the 2027 Notes). The 2027 Notes pay interest semiannually on May 1 and November 1 and will mature on November 1, 2027, unless earlier repurchased or redeemed. The 2027 Notes are fully and unconditionally guaranteed on a senior secured basis by Unisys Holding Corporation, Unisys NPL, Inc. and Unisys AP Investment Company I, each of which is a U.S. corporation that is directly or indirectly owned by the company (the subsidiary guarantors). The 2027 Notes and the related guarantees rank equally in right of payment with all of the existing and future senior debt of the company and its subsidiary guarantors and senior in right of payment to any future subordinated debt of the company and its subsidiary guarantors. The 2027 Notes and the related guarantees are structurally subordinated to all existing and future liabilities (including preferred stock, trade payables and pension liabilities) of the subsidiaries of the company that are not subsidiary guarantors. The 2027 Notes and the guarantees are secured by liens on substantially all assets of the company and the subsidiary guarantors, other than certain excluded assets (the collateral). The liens securing the 2027 Notes on certain ABL collateral are subordinated to the liens on ABL collateral in favor of the ABL secured parties and, in the future, the liens securing the 2027 Notes may be subordinated to liens on the collateral securing certain permitted first lien debt, subject to certain limitations and permitted liens. The company may, on any one or more occasions, redeem all or a part of the 2027 Notes at specified redemption premiums, declining to par for any redemptions on or after November 1, 2025. The indenture contains covenants that limit the ability of the company and its restricted subsidiaries to, among other things: (i) incur additional indebtedness and guarantee indebtedness; (ii) pay dividends or make other distributions or repurchase or redeem its capital stock; (iii) prepay, redeem or repurchase certain debt; (iv) issue certain preferred stock or similar equity securities; (v) make loans and investments; (vi) sell assets; (vii) create or incur liens; (viii) enter into transactions with affiliates; (ix) enter into agreements restricting its subsidiaries’ ability to pay dividends; and (x) consolidate, merge or sell all or substantially all of its assets. These covenants are subject to several important limitations and exceptions. If the company experiences certain kinds of changes of control (as defined in the indenture), it will be required to offer to repurchase the 2027 Notes at 101% of the principal amount of the 2027 Notes, plus accrued and unpaid interest as of the repurchase date, if any. In addition, if the company sells assets under certain circumstances, it must apply the proceeds towards an offer to repurchase the 2027 Notes at a price equal to par plus accrued and unpaid interest, if any. The indenture also provides for events of default, which, if any of them occur, would permit or require the principal, premium, if any, interest and any other monetary obligations on all the then outstanding 2027 Notes to be due and payable immediately. Interest expense related to the 2027 Notes is comprised of the following: Year ended December 31, 2023 2022 2021 Contractual interest coupon $ 33.3 $ 33.3 $ 33.3 Amortization of issuance costs 1.2 1.2 1.2 Total $ 34.5 $ 34.5 $ 34.5 Convertible Senior Notes Due 2021 In March 2021, the company completed the conversion of $84.2 million aggregate principal amount of the Convertible Senior Notes due 2021 (the 2021 Notes) that remained outstanding for a combination of cash and shares of the company’s common stock. As a result of the conversion of the outstanding 2021 Notes, the company delivered to the holders (i) aggregate cash payments totaling approximately $86.5 million, which included an aggregate cash payment for outstanding principal of approximately $84.2 million, an aggregate cash payment for accrued interest of approximately $2.3 million and a nominal cash payment in lieu of fractional shares, and (ii) the issuance of 4,537,123 shares of the company’s common stock. The issuance of the common stock was made in exchange for the 2021 Notes pursuant to an exemption from the registration requirements provided by Section 3(a)(9) of the Securities Act of 1933, as amended. Interest expense related to the 2021 Notes was as follows: Year ended December 31, 2021 Contractual interest coupon $ 0.8 Amortization of debt discount 0.5 Amortization of debt issuance costs 0.1 Total $ 1.4 Asset Based Lending (ABL) Credit Facility The company has a secured revolving credit facility (the Amended and Restated ABL Credit Facility), which matures on October 29, 2025, and provides for revolving loans and letters of credit up to an aggregate amount of $145.0 million (with a limit on letters of credit of $40.0 million), with an accordion feature provision allowing for the aggregate amount available under the credit facility to be increased up to $175.0 million upon the satisfaction of certain specified conditions. The Amended and Restated ABL Credit Facility was amended on June 2, 2023, primarily to replace the reference rate from the London Interbank Offered Rate to the Secured Overnight Financing Rate. Availability under the credit facility is subject to a borrowing base calculated by reference to the company’s receivables. At December 31, 2023, the company had no borrowings and $7.1 million of letters of credit outstanding, and availability under the facility was $88.6 million net of letters of credit issued. The Amended and Restated ABL Credit Facility is subject to a springing maturity, under which the Amended and Restated ABL Credit Facility will immediately mature 91 days prior to any date on which contributions to pension funds in the United States in an amount in excess of $100.0 million are required to be paid unless the company is able to meet certain conditions, including that the company has the liquidity (as defined in the Amended and Restated ABL Credit Facility) to cash settle the amount of such pension payments, no default or event of default has occurred under the Amended and Restated ABL Credit Facility, the company’s liquidity is above $130.0 million and the company is in compliance with the then applicable fixed charge coverage ratio on a pro forma basis. The Amended and Restated ABL Credit Facility is guaranteed by the subsidiary guarantors and any future material domestic subsidiaries. The facility is secured by the assets of the company and the subsidiary guarantors, other than certain excluded assets, under a security agreement entered into by the company and the subsidiary guarantors in favor of JPMorgan Chase Bank, N.A., as agent for the lenders under the credit facility. The company is required to maintain a minimum fixed charge coverage ratio if the availability under the Amended and Restated ABL Credit Facility falls below the greater of 10% of the lenders’ commitments under the facility and $14.5 million. The Amended and Restated ABL Credit Facility contains customary representations and warranties, including, but not limited to, that there has been no material adverse change in the company’s business, properties, operations or financial condition. The Amended and Restated ABL Credit Facility includes restrictions on the ability of the company and its subsidiaries to, among other things, incur other debt or liens, dispose of assets and make acquisitions, loans and investments, repurchase its equity, and prepay other debt. These restrictions are subject to several important limitations and exceptions. Events of default include non-payment, failure to comply with covenants, materially incorrect representations and warranties, change of control and default under other debt aggregating at least $50.0 million, subject to relevant cure periods, as applicable.

Other accrued liabilities

Other accrued liabilities	12 Months Ended
	Dec. 31, 2023
Other Liabilities Disclosure [Abstract]
Other accrued liabilities	Other accrued liabilities Other accrued liabilities (current) are comprised of the following: As of December 31, 2023 2022 Payrolls and commissions $ 124.5 $ 84.8 Income taxes 31.4 41.3 Taxes other than income taxes 27.4 23.2 Accrued vacations 22.4 21.1 Operating leases 19.1 26.0 Postretirement 10.2 11.7 Cost reduction 9.4 11.7 Accrued interest 5.8 5.9 Other 58.2 45.9 Total other accrued liabilities $ 308.4 $ 271.6

Employee plans

Employee plans	12 Months Ended
	Dec. 31, 2023
Retirement Benefits [Abstract]
Employee plans	Employee plans Stock plans Under stockholder approved stock-based plans, stock options, stock appreciation rights, restricted stock and restricted stock units may be granted to officers, directors and other key employees. At December 31, 2023, 5.3 million shares of unissued common stock of the company were available for granting under these plans. As of December 31, 2023, the company has granted restricted stock and restricted stock units under these plans. The company recognizes compensation cost, net of a forfeiture rate, in selling, general and administrative expense, and recognizes compensation cost only for those awards expected to vest. The company estimates the forfeiture rate based on its historical experience and its expectations about future forfeitures. During the years ended December 31, 2023, 2022 and 2021, the company recorded $17.2 million, $20.0 million and $18.8 million of share-based restricted stock and restricted stock unit compensation expense, respectively. Restricted stock and restricted stock unit awards may contain time-based units, performance-based units, total shareholder return market-based units, or a combination of these units. Each performance-based and market-based unit will vest into zero to two shares depending on the degree to which the performance or market conditions are met. Compensation expense for performance-based awards is recognized as expense ratably for each installment from the date of grant until the date the restrictions lapse and is based on the fair market value at the date of grant and the probability of achievement of the specific performance-related goals. Compensation expense for market-based awards is recognized as expense ratably over the measurement period, regardless of the actual level of achievement, provided the service requirement is met. Restricted stock unit grants for the company’s directors vest upon award and compensation expense for such awards is recognized upon grant. A summary of restricted stock and restricted stock unit (RSU) activity for the year ended December 31, 2023 follows (shares in thousands): Restricted Stock and RSU Weighted-Average Grant-Date Fair Value Outstanding at December 31, 2022 2,230 $ 23.53 Granted 3,881 4.14 Vested (686) 13.26 Forfeited and expired (667) 11.40 Outstanding at December 31, 2023 4,758 9.27 The aggregate weighted-average grant-date fair value of restricted stock and restricted stock units granted during the years ended December 31, 2023, 2022 and 2021 was $17.1 million, $27.0 million and $37.5 million, respectively. The fair value of restricted stock and restricted stock units with time and performance conditions is determined based on the trading price of the company’s common shares on the date of grant. The fair value of awards with market conditions is estimated using a Monte Carlo simulation with the following weighted-average assumptions. Year ended December 31, 2023 2022 Weighted-average fair value of grant $ 7.32 $ 34.14 Risk-free interest rate (i) 4.51 % 1.72 % Expected volatility (ii) 63.63 % 57.71 % Expected life of restricted stock units in years (iii) 2.84 2.85 Expected dividend yield — % — % (i) Represents the continuously compounded semi-annual zero-coupon U.S. treasury rate commensurate with the remaining performance period. (ii) Based on historical volatility for the company that is commensurate with the length of the performance period. (iii) Represents the remaining life of the longest performance period. As of December 31, 2023, there was $18.2 million of total unrecognized compensation cost related to outstanding restricted stock and restricted stock units granted under the company’s plans. That cost is expected to be recognized over a weighted-average period of 1.7 years. The aggregate weighted-average grant-date fair value of restricted stock and restricted stock units vested during the years ended December 31, 2023, 2022 and 2021 was $9.1 million, $17.4 million and $15.3 million, respectively. Common stock issued upon lapse of restrictions on restricted stock and restricted stock units are newly issued shares. In light of its tax position, the company is currently not recognizing any tax benefits from the issuance of stock upon lapse of restrictions on restricted stock and restricted stock units. Defined contribution and compensation plans U.S. employees are eligible to participate in an employee savings plan. Under this plan, employees may contribute a percentage of their pay for investment in various investment alternatives. The company matches 50 percent of the first 6 percent of eligible pay contributed by participants to the plan on a before-tax basis (subject to IRS limits). The company funds the match with cash. The charge related to the company match for the years ended December 31, 2023, 2022 and 2021, was $6.6 million, $6.9 million and $7.5 million, respectively. The company has defined contribution plans in certain locations outside the United States. The charge related to these plans was $16.9 million, $16.6 million and $16.4 million, for the years ended December 31, 2023, 2022 and 2021, respectively. The company has non-qualified compensation plans, which allow certain highly compensated employees and directors to defer the receipt of a portion of their salary, bonus and fees. Participants can earn a return on their deferred balance that is based on hypothetical investments in various investment vehicles. Changes in the market value of these investments are reflected as an adjustment to the liability with an offset to expense. As of December 31, 2023 and 2022, the liability to the participants of these plans was $7.1 million and $7.9 million, respectively. These amounts reflect the accumulated participant deferrals and earnings thereon as of that date. The company makes no contributions to the deferred compensation plans and remains contingently liable to the participants. Retirement benefits For the company’s more significant defined benefit pension plans, including the U.S. and U.K., accrual of future benefits under the plans has ceased. Management develops the actuarial assumptions used by its U.S. and international defined benefit pension plan obligations based upon the circumstances of each particular plan. The determination of the defined benefit pension plan obligations requires the use of estimates. The American Rescue Plan Act, which was signed into law in the U.S. in 2021, includes a provision for pension relief that extends the amortization period for required contributions from 7 to 15 years and provides for the stabilization of interest rates used to calculate future required contributions. As a result, the company was not required to make cash contributions to its U.S. qualified defined benefit pension plans in 2023, 2022 and 2021. In March 2023, the company purchased a group annuity contract, with plan assets, for approximately $263 million to transfer projected benefit obligations related to approximately 8,650 retirees of one of the company’s U.S. defined benefit pension plans. This action resulted in a pre-tax settlement loss of $181.0 million for the year ended December 31, 2023. In November 2023, the company purchased a group annuity contract, with plan assets, for approximately $253 million to transfer projected benefit obligations related to approximately 3,900 retirees of one of the company’s U.S. defined benefit pension plans. This action resulted in a pre-tax settlement loss of $167.2 million for the year ended December 31, 2023. In January of 2021, the company purchased a group annuity contract for $279 million to transfer projected benefit obligations related to approximately 11,600 retirees of the company’s U.S. defined benefit pension plans. This action resulted in a pre-tax settlement loss of $158.0 million for the year ended December 31, 2021. Effective May 1, 2021, the company’s primary pension plan related to its Dutch subsidiary was transferred to a multi-client circle within a multi-employer fund. This resulted in removing all of the plan’s projected benefit obligations, valued at approximately $553 million, from the company’s balance sheet. This action resulted in a pre-tax settlement loss of $182.5 million for the year ended December 31, 2021. In the second quarter of 2021, the company’s Swiss subsidiary transferred its defined benefit pension plan to a multiple-employer collective foundation. This resulted in removing the projected benefit obligations related to retirees under the Swiss plan, valued at approximately $100 million, from the company’s balance sheet. The transfer required a one-time additional contribution of approximately $10 million to the Swiss plan in 2021. This action resulted in a pre-tax settlement loss of $28.8 million for the year ended December 31, 2021. On October 14, 2021, the company purchased a group annuity contract for approximately $235 million to transfer projected benefit obligations related to approximately 6,900 retirees of the company’s U.S. defined benefit pension plans. This action resulted in a pre-tax settlement loss of $130.1 million for the year ended December 31, 2021. Retirement plans’ funded status and amounts recognized in the company’s consolidated balance sheets follows: U.S. Plans International Plans As of December 31, 2023 2022 2023 2022 Change in projected benefit obligation Benefit obligation at beginning of year $ 2,852.9 $ 3,709.6 $ 1,574.6 $ 2,614.4 Service cost — — 1.1 1.9 Interest cost 152.7 114.6 72.3 39.3 Plan participants’ contributions — — 1.2 1.1 Plan settlement (516.1) — (4.5) — Actuarial (gain) loss 80.2 (668.1) 67.7 (726.4) Benefits paid (278.0) (303.2) (80.9) (86.4) Foreign currency translation adjustments — — 83.9 (269.3) Benefit obligation at end of year $ 2,291.7 $ 2,852.9 $ 1,715.4 $ 1,574.6 Change in plan assets Fair value of plan assets at beginning of year $ 2,440.1 $ 3,139.3 $ 1,444.3 $ 2,431.6 Actual return on plan assets 166.1 (401.9) 18.7 (685.7) Employer contribution 5.8 5.9 36.6 33.4 Plan participants’ contributions — — 1.2 1.1 Plan settlement (516.1) — (4.5) — Benefits paid (278.0) (303.2) (80.9) (86.4) Foreign currency translation adjustments — — 70.8 (249.7) Fair value of plan assets at end of year $ 1,817.9 $ 2,440.1 $ 1,486.2 $ 1,444.3 Funded status at end of year $ (473.8) $ (412.8) $ (229.2) $ (130.3) Amounts recognized in the consolidated balance sheets consist of: Prepaid postretirement assets $ 30.7 $ 44.4 $ 7.3 $ 75.1 Other accrued liabilities (5.4) (5.4) (0.2) (0.2) Long-term postretirement liabilities (499.1) (451.8) (236.3) (205.2) Total funded status $ (473.8) $ (412.8) $ (229.2) $ (130.3) Accumulated other comprehensive loss, net of tax Net loss $ 1,514.2 $ 1,845.3 $ 1,037.8 $ 859.7 Prior service credit $ (24.7) $ (27.2) $ (45.0) $ (44.9) Accumulated benefit obligation $ 2,291.7 $ 2,852.9 $ 1,712.5 $ 1,573.0 Information for defined benefit retirement plans with an accumulated benefit obligation in excess of plan assets follows: As of December 31, 2023 2022 Accumulated benefit obligation $ 3,544.3 $ 3,621.6 Fair value of plan assets $ 2,806.2 $ 2,960.6 Information for defined benefit retirement plans with a projected benefit obligation in excess of plan assets follows: As of December 31, 2023 2022 Projected benefit obligation $ 3,547.2 $ 3,623.2 Fair value of plan assets $ 2,806.2 $ 2,960.6 Net periodic pension expense (income) includes the following components: U.S. Plans International Plans Year ended December 31, 2023 2022 2021 2023 2022 2021 Service cost (i) $ — $ — $ — $ 1.1 $ 1.9 $ 3.0 Interest cost 152.7 114.6 117.6 72.3 39.3 36.7 Expected return on plan assets (178.6) (189.8) (199.8) (84.9) (77.4) (81.6) Amortization of prior service credit (2.5) (2.5) (2.5) (2.4) (2.6) (2.8) Recognized net actuarial loss 75.6 125.9 135.6 9.1 37.7 48.3 Settlement losses 348.2 — 288.1 0.7 — 211.3 Net periodic pension expense (income) $ 395.4 $ 48.2 $ 339.0 $ (4.1) $ (1.1) $ 214.9 (i) Service cost is reported in cost of revenue and selling, general and administrative expenses. All other components of net periodic pension expense (income) are reported in other (expense) Management’s significant assumption used in the determination of the defined benefit pension plan obligations with respect to the U.S. pension plans, is the discount rate. Weighted-average assumptions used to determine net periodic pension expense (income) were as follows: U.S. Plans International Plans Year ended December 31, 2023 2022 2021 2023 2022 2021 Discount rate 6.04 % 3.18 % 2.85 % 4.80 % 1.73 % 1.23 % Expected long-term rate of return on assets 7.10 % 6.50 % 6.07 % 4.44 % 3.88 % 3.30 % Weighted-average assumptions used to determine benefit obligations at December 31 were as follows: Discount rate 5.70 % 6.04 % 3.18 % 4.24 % 4.80 % 1.73 % The company’s investment policy targets and ranges for each asset category are as follows: U.S. International Asset Category Target Range Target Range Equity securities 40 % 35-45% 1 % 0-1% Debt securities 44 % 39-49% 57 % 52-62% Real estate 0 % 0 % 1 % 0-1% Cash 0 % 0-5% 0 % 0-0% Other 16 % 11-21% 41 % 34-49% The company periodically reviews its asset allocation, taking into consideration plan liabilities, local regulatory requirements, plan payment streams and then-current capital market assumptions. The actual asset allocation for each plan is monitored at least quarterly, relative to the established policy targets and ranges. If the actual asset allocation is close to or out of any of the ranges, a review is conducted. Rebalancing will occur toward the target allocation, with due consideration given to the liquidity of the investments and transaction costs. The objectives of the company’s investment strategies are as follows: (a) to provide a total return that, over the long term, increases the ratio of plan assets to liabilities by maximizing investment return on assets, at a level of risk deemed appropriate, (b) to maximize return on assets by investing in equity securities in the U.S. and for international plans by investing in appropriate asset classes, subject to the constraints of each plan’s asset allocation targets, as discussed above, design and local regulations, (c) to diversify investments within asset classes to reduce the impact of losses in single investments, and (d) for the U.S. plans to invest in compliance with the Employee Retirement Income Security Act of 1974 (ERISA), as amended and any subsequent applicable regulations and laws, and for international plans to invest in a prudent manner in compliance with local applicable regulations and laws. The company sets the expected long-term rate of return based on the expected long-term return of the various asset categories in which it invests. The company considered the current expectations for future returns and the actual historical returns of each asset class. Also, since the company’s investment policy is to actively manage certain asset classes where the potential exists to outperform the broader market, the expected returns for those asset classes were adjusted to reflect the expected additional returns. In 2024, the company expects to make cash contributions of approximately $21 million, primarily for international defined benefit pension plans. As of December 31, 2023, the following benefit payments are expected to be paid from the defined benefit pension plans: Year U.S. International 2024 $ 240.7 $ 93.8 2025 234.8 94.9 2026 228.5 98.2 2027 221.7 100.6 2028 213.8 102.1 2029 - 2033 932.0 531.1 Other postretirement benefits A reconciliation of the benefit obligation, fair value of the plan assets and the funded status of the postretirement benefit plans follows: As of December 31, 2023 2022 Change in accumulated benefit obligation Benefit obligation at beginning of year $ 68.9 $ 81.1 Service cost 0.2 0.2 Interest cost 2.6 1.9 Plan participants’ contributions 0.3 0.9 Actuarial gain (6.9) (16.1) Benefits paid (5.1) (4.9) Foreign currency translation and other adjustments 0.1 5.8 Benefit obligation at end of year $ 60.1 $ 68.9 Change in plan assets Fair value of plan assets at beginning of year $ 5.2 $ 5.6 Actual return on plan assets (2.8) (0.7) Employer contributions 5.6 4.3 Plan participants’ contributions 0.3 0.9 Benefits paid (5.1) (4.9) Fair value of plan assets at end of year $ 3.2 $ 5.2 Funded status at end of year $ (56.9) $ (63.7) Amounts recognized in the consolidated balance sheets consist of: Other accrued liabilities $ (4.6) $ (6.1) Long-term postretirement liabilities (52.3) (57.6) Total funded status $ (56.9) $ (63.7) Accumulated other comprehensive income, net of tax Net income $ (7.6) $ (7.8) Prior service cost (credit) 0.6 (0.7) Net periodic postretirement benefit (income) cost follows: Year ended December 31, 2023 2022 2021 Service cost (i) $ 0.2 $ 0.2 $ 0.4 Interest cost 2.6 1.9 1.8 Expected return on assets (0.3) (0.3) (0.3) Amortization of prior service credit (1.3) (1.4) (1.7) Recognized net actuarial gain (4.0) (2.2) (2.1) Net periodic benefit income $ (2.8) $ (1.8) $ (1.9) (i) Service cost is reported in selling, general and administrative expenses. All other components of net periodic benefit (income) cost are reported in other (expense), net in the consolidated statements of income (loss). Weighted-average assumptions used to determine net periodic postretirement benefit (income) were as follows: Year ended December 31, 2023 2022 2021 Discount rate 5.39 % 2.70 % 2.21 % Expected return on plan assets 5.50 % 5.50 % 5.50 % Weighted-average assumptions used to determine benefit obligation at December 31 were as follows: Year ended December 31, 2023 2022 2021 Discount rate 5.03 % 5.39 % 2.70 % The company reviews its asset allocation periodically, taking into consideration plan liabilities, plan payment streams and then-current capital market assumptions. The company sets the long-term expected return on asset assumption, based principally on the long-term expected return on debt securities. These return assumptions are based on a combination of current market conditions, capital market expectations of third-party investment advisors and actual historical returns of the asset classes. In 2024, the company expects to contribute approximately $4 million to its postretirement benefit plans. Assumed health care cost trend rates at December 31, 2023 2022 Health care cost trend rate assumed for next year 7.0 % 7.0 % Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) 4.5 % 4.5 % Year that the rate reaches the ultimate trend rate 2033 2033 As of December 31, 2023, the following benefits are expected to be paid from the company’s postretirement plans: Year Expected 2024 $ 5.2 2025 4.6 2026 4.4 2027 4.1 2028 3.9 2029 – 2033 16.8 The following provides a description of the valuation methodologies and the levels of inputs used to measure fair value, and the general classification of investments in the company’s U.S. and international defined benefit pension plans, and the company’s other postretirement benefit plan. Level 1 – These investments include cash, common stocks, real estate investment trusts, exchange traded funds, futures and options and U.S. government securities. These investments are valued using quoted prices in an active market. Payables, receivables and cumulative futures contracts variation margin received from brokers are also included as Level 1 investments and are valued at face value. Level 2 – These investments include the following: Pooled Funds – These investments are comprised of money market funds and fixed income securities. The money market funds are valued using the readily determinable fair value (RDFV) provided by trustees of the funds. The fixed income securities are valued based on quoted prices for identical or similar investments in markets that may not be active. Commingled Funds – These investments are comprised of debt, equity and other securities and are valued using the RDFV provided by trustees of the funds. The fair value per share for these funds are published and are the basis for current transactions. Other Fixed Income – These investments are comprised of corporate and government fixed income investments and asset and mortgage-backed securities for which there are quoted prices for identical or similar investments in markets that may not be active. Derivatives – These investments include forward exchange contracts and options, which are traded on an active market, but not on an exchange; therefore, the inputs may not be readily observable. These investments also include fixed income futures and other derivative instruments. Level 3 – These investments include the following: Insurance Contracts – These investments are insurance contracts which are carried at book value, are not publicly traded and are reported at a fair value determined by the insurance provider. Certain investments are valued using net asset value (NAV) as a practical expedient. These investments may not be redeemable on a daily basis and may have redemption notice periods of up to 120 days. These investments include the following: Commingled Funds – These investments are comprised of debt, equity and other securities. The NAV is used as a practical expedient to estimate fair value. The NAV is based on the fair value of the underlying investments held by the funds less their liabilities. This practical expedient is not used when it is determined to be probable that the fund will sell the investment for an amount different than the reported NAV. Private Real Estate and Private Equity - These investments represent interests in limited partnerships which invest in privately-held companies or privately-held real estate or other real assets. Net asset values are developed and reported by the general partners that manage the partnerships. These valuations are based on property appraisals, utilization of market transactions that provide valuation information for comparable companies, discounted cash flows and other methods. These valuations are reported quarterly and adjusted as necessary at year end based on cash flows within the most recent period. The following table sets forth by level, within the fair value hierarchy, the plans’ assets (liabilities) at fair value at December 31, 2023. U.S. Plans International Plans As of December 31, 2023 Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Pension plans Equity Securities Common Stocks $ 361.5 $ 360.6 $ 0.9 $ — $ — $ — $ — $ — Commingled Funds 227.9 227.9 Debt Securities U.S. Govt. Securities 289.8 289.8 Other Fixed Income 245.1 245.1 360.3 360.3 Insurance Contracts 510.6 510.6 Commingled Funds 127.4 127.4 16.1 16.1 Real Estate Real Estate Investment Trusts 34.6 34.6 Other Derivatives (i) 89.9 68.1 21.8 (3.4) (3.4) Commingled Funds 13.2 13.2 Pooled Funds 80.0 80.0 12.0 12.0 Cumulative futures contracts variation margin paid to brokers (67.4) (67.4) Cash 1.6 1.6 37.9 37.9 Receivables 10.8 10.8 — — Payables (19.0) (19.0) — — Total plan assets in fair value hierarchy $ 1,382.2 $ 679.1 $ 703.1 $ — $ 946.7 $ 37.9 $ 398.2 $ 510.6 Plan assets measured using NAV as a practical expedient (ii): Commingled Funds Debt $ 102.3 $ 191.4 Other 96.8 348.1 Private Real Estate 188.9 Private Equity 47.7 Total pension plan assets $ 1,817.9 $ 1,486.2 Other postretirement plans Insurance Contracts $ 3.2 $ 3.2 (i) Level 1 derivatives represent unrealized appreciation or depreciation on open futures contracts. The value of open futures contracts includes derivatives and the cumulative futures contracts variation margin paid to or received from brokers. (ii) Investments measured at fair value using NAV as a practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets. The following table sets forth by level, within the fair value hierarchy, the plans’ assets (liabilities) at fair value at December 31, 2022. U.S. Plans International Plans As of December 31, 2022 Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Pension plans Equity Securities Common Stocks $ 544.6 $ 543.2 $ 1.4 $ — $ — $ — $ — $ — Commingled Funds 383.2 383.2 Debt Securities U.S. Govt. Securities 291.7 291.7 Other Fixed Income 293.8 293.8 2.8 2.8 Insurance Contracts 100.3 100.3 Commingled Funds 185.5 185.5 126.5 126.5 Real Estate Real Estate Investment Trusts 87.1 87.1 Other Derivatives (i) 95.0 (4.7) 99.7 Commingled Funds 15.0 15.0 Pooled Funds 92.1 92.1 25.3 25.3 Cumulative futures contracts variation margin received from brokers 5.3 5.3 Cash 0.8 0.8 20.5 20.5 Receivables 9.3 9.3 120.9 120.9 Payables (42.5) (42.5) (0.2) (0.2) Total plan assets in fair value hierarchy $ 1,945.9 $ 890.2 $ 1,055.7 $ — $ 411.1 $ 141.2 $ 169.6 $ 100.3 Plan assets measured using NAV as a practical expedient (ii): Commingled Funds Debt $ 65.0 $ 788.8 Other 147.4 244.4 Private Real Estate 238.9 Private Equity 42.9 Total pension plan assets $ 2,440.1 $ 1,444.3 Other postretirement plans Insurance Contracts $ 5.2 $ 5.2 (i) Level 1 derivatives represent unrealized appreciation or depreciation on open futures contracts. The value of open futures contracts includes derivatives and the cumulative futures contracts variation margin received from brokers. (ii) Investments measured at fair value using NAV as a practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets. The following tables set forth a summary of changes in the fair value of the plans’ Level 3 assets for the years ended December 31, 2023 and 2022. January 1, 2023 Realized Purchases Sales Currency and unrealized gains (losses) relating to instruments still held at December 31, 2023 December 31, 2023 U.S. plans Other postretirement plans Insurance Contracts $ 5.2 $ (2.8) $ 0.8 $ — $ — $ 3.2 International pension plans Insurance Contracts $ 100.3 $ — $ 375.6 $ (13.8) $ 48.5 $ 510.6 January 1, 2022 Realized Purchases Sales Currency and unrealized gains (losses) relating to instruments still held at December 31, 2022 December 31, 2022 U.S. plans Other postretirement plans Insurance Contracts $ 5.6 $ (0.7) $ 0.3 $ — $ — $ 5.2 International pension plans Insurance Contracts $ 110.2 $ — $ 5.2 $ (10.0) $ (5.1) $ 100.3 The following table presents additional information about plan assets valued using the net asset value as a practical expedient within the fair value hierarchy table. 2023 2022 Fair Value Unfunded Commit-ments Redemption Frequency Redemption Notice Period Range Fair Value Unfunded Commit-ments Redemption Frequency Redemption Notice Period Range U.S. plans Commingled Funds Debt $ 102.3 $ — Daily, Monthly 15-45 days $ 65.0 $ — Monthly 45 days Other 96.8 — Monthly, Quarterly 5-90 days 147.4 — Monthly, Quarterly 5-90 days Private Real Estate (i) 188.9 — Quarterly 60-90 days 238.9 — Quarterly 60-90 days Private Equity (ii) 47.7 23.3 42.9 28.4 Total $ 435.7 $ 23.3 $ 494.2 $ 28.4 International pension plans Commingled Funds Debt $ 191.4 $ 42.1 Never $ 788.8 $ 73.7 Weekly, Monthly, Quarterly Up to 120 days Other 348.1 — Bimonthly 10 days 244.4 — Bimonthly 10 days Total $ 539.5 $ 42.1 $ 1,033.2 $ 73.7 (i) Includes investments in private real estate funds. The funds invest in U.S. real estate and allow redemptions quarterly, though queues, restrictions and gates may extend the period. A redemption has been requested from three funds, which have a redemption queue with estimates of full receipt of three (ii)

Litigation and contingencies

Litigation and contingencies	12 Months Ended
	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Litigation and contingencies	Litigation and contingencies The company is involved in a wide range of lawsuits, claims, investigations and proceedings, which arise in the ordinary course of business, including actions with respect to commercial and government contracts, labor and employment, employee benefits, environmental matters, intellectual property and non-income tax matters. Further, given the rapidly evolving external landscape of cybersecurity, privacy and data protection laws, regulations and threat actors, the company and its clients have been and will continue to be subject to actions or proceedings in various jurisdictions. These matters can involve a number of different parties, including competitors, clients, current or former employees, government and regulatory agencies, stockholders and representatives of the locations in which the company does business. Many of these matters are also highly complex and may seek recovery on behalf of a class or similarly large number of plaintiffs. It is therefore inherently difficult to predict the size or scope of potential future losses arising from these matters. The company records a provision for these matters when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Significant judgment is required in both the determination of probability and the determination as to whether an exposure is reasonably estimable. Because of uncertainties related to these matters, accruals are based only on the best information available at the time. Any provisions are reviewed at least quarterly and are adjusted to reflect the impact and status of settlements, rulings, advice of counsel and other information and events pertinent to a particular matter. These adjustments could have a material impact on our results of operations and financial position. The company intends to defend itself vigorously with respect to any legal matters. Based on its experience, the company also believes that the damage amounts claimed against it in the matters disclosed below are not a meaningful indicator of the company’s potential liability. Legal proceedings are inherently unpredictable and unfavorable resolutions have and could occur. Whether any losses, damages or remedies finally determined in any claim, suit, investigation or proceeding could reasonably have a material effect on the company’s business, financial condition, results of operations or cash flows will depend on a number of variables, including: the timing and amount of such losses or damages; the structure and type of any such remedies; the significance of the impact any such losses, damages or remedies may have in the company’s consolidated financial statements; and the unique facts and circumstances of the particular matter that may give rise to additional factors. Accordingly, it is possible that an adverse outcome from such matters could be material to the company’s financial condition, results of operations and cash flows in any particular reporting period. Notwithstanding that the ultimate results of the lawsuits, claims, investigations and proceedings that have been brought or asserted against the company are not currently determinable, the company believes that at December 31, 2023, it has adequate provisions for any such matters. The following is a summary of the more significant legal proceedings involving the company. The company’s Brazilian operations, along with those of many other companies doing business in Brazil, are involved in various litigation matters, including numerous governmental assessments related to indirect and other taxes, as well as disputes associated with former employees and contract labor. The tax-related matters pertain to value-added taxes, customs, duties, sales and other non-income-related tax exposures. The labor-related matters include claims related to compensation. The company believes that appropriate accruals have been established for such matters based on information currently available. At December 31, 2023, excluding those matters that have been assessed by management as being remote as to the likelihood of ultimately resulting in a loss, the amount related to unreserved tax-related matters, inclusive of any related interest, is estimated to be approximately $119 million. From time to time, the company is involved in legal proceedings with its clients concerning products and services that the company has provided. On January 31, 2024, in response to a claim brought by a former client for approximately $28 million including interest, a court in The Hague, Netherlands issued a judgment against Unisys Netherlands, N.V. in the amount of approximately $8 million including interests and compensation for legal fees. The parties have until April 30, 2024 to appeal the judgment. The company believes it has an adequate provision for this matter. On November 11, 2022, a purported stockholder of the company filed a putative securities class action complaint in the United States District Court for the Eastern District of Pennsylvania against the company and certain of its current officers, alleging violations of the Securities Exchange Act of 1934, as amended (the Exchange Act). The plaintiff seeks an award of compensatory damages, among other relief, and costs and attorneys’ and experts’ fees. On August 21, 2023, the class action complaint was amended to assert violations of the Exchange Act, based on allegedly false or misleading statements related to the efficacy of the company’s disclosure controls and procedures, and internal control over financial reporting in certain of the company’s 2021 and 2022 filings with the SEC. On October 20, 2023, the company filed a motion to dismiss the amended complaint for plaintiff’s failure to state a claim on which relief may be granted. On February 1, 2024, the Court entered an order dismissing plaintiff’s amended complaint, permitting the plaintiff to file a second amended complaint on or before March 1, 2024, if the deficiencies found in the amended complaint by the court can be cured. As previously disclosed, the company received voluntary requests for information and documents from the SEC relating to the company’s policies, procedures and disclosures in connection with cybersecurity incidents. The company is cooperating with the SEC’s investigation of certain of the company’s cybersecurity risk disclosures and cybersecurity-related internal controls, including with respect to the material weaknesses that the company identified and disclosed in the company’s Annual Report on Form 10-K for the year ended December 31, 2022. The company is in discussions with the SEC staff regarding a potential non-scienter-based settlement of the alleged issues arising from the investigation but there can be no assurance that the company will be able to resolve the matter on terms acceptable to the company and the SEC. The company believes it has an adequate provision for this matter. With respect to the specific legal proceedings and claims described above, except as otherwise noted, either (i) the amount or range of possible losses in excess of amounts accrued, if any, is not reasonably estimable or (ii) the company believes that the amount or range of possible losses in excess of amounts accrued that are estimable would not be material. Nonetheless, the company is unable to predict the outcome from such matters and it is possible that an adverse result could be material to the company’s financial conditions, results of operations and cash flows. Environmental Matters As of December 31, 2023, the company has an estimated environmental liability for a site that its predecessor company previously operated of approximately $28 million, of which $13 million is reported in other accrued liabilities other long-term liabilities As the company continues to perform investigation activities and if events and circumstances change, the company may incur future additional costs, which could have a material impact on the company’s results of operations, financial condition and cash flows.

Stockholders' equity

Stockholders' equity	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
Stockholders' equity	Stockholders’ equity The company has 150 million authorized shares of common stock, par value $.01 per share, and 40 million shares of authorized preferred stock, par value $1 per share, issuable in series. At December 31, 2023, 11.5 million shares of unissued common stock of the company were reserved for future issuance. Accumulated other comprehensive loss is as follows: Total Translation Postretirement Balance at December 31, 2020 $ (3,939.5) $ (826.6) $ (3,112.9) Other comprehensive income (loss) before reclassifications 58.6 (43.6) 102.2 Amounts reclassified from accumulated other comprehensive loss 616.8 4.0 612.8 Current period other comprehensive income (loss) 675.4 (39.6) 715.0 Balance at December 31, 2021 (3,264.1) (866.2) (2,397.9) Other comprehensive income (loss) before reclassifications 38.0 (114.1) 152.1 Amounts reclassified from accumulated other comprehensive loss 150.1 2.9 147.2 Current period other comprehensive income (loss) 188.1 (111.2) 299.3 Balance at December 31, 2022 (3,076.0) (977.4) (2,098.6) Other comprehensive (loss) income before reclassifications (142.8) 68.3 (211.1) Amounts reclassified from accumulated other comprehensive loss 418.5 (3.7) 422.2 Current period other comprehensive income 275.7 64.6 211.1 Balance at December 31, 2023 $ (2,800.3) $ (912.8) $ (1,887.5) Amounts reclassified out of accumulated other comprehensive loss are as follows: Year ended December 31, 2023 2022 2021 Translation adjustments: Adjustment for substantial completion of liquidation of foreign subsidiaries (i) $ (3.7) $ 2.9 $ 4.0 Postretirement plans (ii) : Amortization of prior service credit (5.4) (5.8) (6.2) Amortization of actuarial losses 80.5 159.0 178.9 Settlement losses 348.9 — 499.4 Total before tax 420.3 156.1 676.1 Income tax (1.8) (6.0) (59.3) Total reclassifications for the period $ 418.5 $ 150.1 $ 616.8 (i) Reported in other (expense), net in the consolidated statements of income (loss). (ii) Included in net periodic postretirement cost (see Note 17, “Employee plans”). The following table summarizes the changes in shares of common stock and treasury stock: Common Treasury Balance at December 31, 2020 66.8 3.8 Debt exchange 4.6 1.2 Stock-based compensation 1.1 0.3 Balance at December 31, 2021 72.5 5.3 Stock-based compensation 0.8 0.2 Balance at December 31, 2022 73.3 5.5 Stock-based compensation 0.7 0.1 Balance at December 31, 2023 74.0 5.6

Segment information

Segment information	12 Months Ended
	Dec. 31, 2023
Segment Reporting [Abstract]
Segment information	Segment information The company’s reportable segments are as follows: • Digital Workplace Solutions (DWS), which provides modern and traditional workplace solutions; • Cloud, Applications & Infrastructure Solutions (CA&I), which provides digital platform, applications and infrastructure solutions; and • Enterprise Computing Solutions (ECS), which provides solutions that harness secure, continuous high-intensity computing and enable digital services through software-defined operating environments. The accounting policies of each segment are the same as those followed by the company as a whole. The company evaluates segment performance based on gross profit exclusive of the service cost component of postretirement income or expense, restructuring charges, amortization of purchased intangibles and unusual and nonrecurring items, which are included in other gross profit. Corporate assets are principally cash and cash equivalents, prepaid postretirement assets and deferred income taxes. The expense or income related to corporate assets and centrally incurred costs are allocated to the business segments. No single customer accounts for more than 10% of revenue. A summary of the company’s operations by segment is presented below: Total Segments DWS CA&I ECS 2023 Customer revenue $ 1,725.1 $ 546.1 $ 531.0 $ 648.0 Intersegment — — — — Total revenue $ 1,725.1 $ 546.1 $ 531.0 $ 648.0 Gross profit $ 554.7 $ 76.2 $ 81.9 $ 396.6 Depreciation and amortization $ 121.8 $ 29.2 $ 29.8 $ 62.8 Total assets $ 1,196.6 $ 379.2 $ 249.6 $ 567.8 Capital expenditures $ 65.9 $ 3.9 $ 7.1 $ 54.9 2022 Customer revenue $ 1,699.9 $ 509.9 $ 520.3 $ 669.7 Intersegment — — — — Total revenue $ 1,699.9 $ 509.9 $ 520.3 $ 669.7 Gross profit $ 550.8 $ 71.5 $ 47.3 $ 432.0 Depreciation and amortization $ 159.2 $ 38.9 $ 42.3 $ 78.0 Total assets $ 1,190.6 $ 346.5 $ 268.3 $ 575.8 Capital expenditures $ 68.4 $ 6.3 $ 6.5 $ 55.6 2021 Customer revenue $ 1,745.8 $ 574.5 $ 485.6 $ 685.7 Intersegment 1.4 — — 1.4 Total revenue $ 1,747.2 $ 574.5 $ 485.6 $ 687.1 Gross profit $ 562.3 $ 79.3 $ 47.2 $ 435.8 Depreciation and amortization $ 129.1 $ 18.6 $ 55.0 $ 55.5 Total assets $ 1,237.2 $ 353.5 $ 289.6 $ 594.1 Capital expenditures $ 78.9 $ 13.5 $ 13.2 $ 52.2 Presented below is a reconciliation of total segment revenue to total consolidated revenue: Year ended December 31, 2023 2022 2021 Total segment revenue $ 1,725.1 $ 1,699.9 $ 1,747.2 Other revenue 290.3 280.0 308.6 Elimination of intercompany revenue — — (1.4) Total consolidated revenue $ 2,015.4 $ 1,979.9 $ 2,054.4 Presented below is a reconciliation of total segment gross profit to total consolidated loss before income taxes: Year ended December 31, 2023 2022 2021 Total segment gross profit $ 554.7 $ 550.8 $ 562.3 Other gross profit (loss) (3.4) (21.2) 9.7 Total gross profit 551.3 529.6 572.0 Selling, general and administrative expense (450.3) (453.2) (389.5) Research and development expense (24.1) (24.2) (28.5) Interest expense (30.8) (32.4) (35.4) Other (expense), net (393.9) (82.4) (580.3) Total loss before income taxes $ (347.8) $ (62.6) $ (461.7) Other revenue and other gross profit (loss) are comprised of an aggregation of a number of immaterial business activities and cost reduction charges. These businesses principally provide for the management of processes and functions for clients in select industries, helping them improve performance and reduce costs. Presented below is a reconciliation of total business segment assets to consolidated assets: As of December 31, 2023 2022 2021 Total segment assets $ 1,196.6 $ 1,190.6 $ 1,237.2 Other assets 82.1 96.8 206.9 Cash and cash equivalents 387.7 391.8 552.9 Deferred income taxes 114.0 118.6 125.3 Operating lease right-of-use assets 35.4 42.5 62.7 Prepaid postretirement assets 38.0 119.5 159.7 Other corporate assets 111.6 105.8 74.8 Total assets $ 1,965.4 $ 2,065.6 $ 2,419.5 Geographic information about the company’s revenue, which is principally based on location of the selling organization, properties and outsourcing assets, is presented below: Year ended December 31, 2023 2022 2021 Revenue United States $ 889.0 $ 854.9 $ 856.2 United Kingdom 289.3 228.0 284.9 Other foreign (i) 837.1 897.0 913.3 Total Revenue $ 2,015.4 $ 1,979.9 $ 2,054.4 Properties, net United States $ 45.9 $ 52.5 $ 62.5 Other foreign (i) 18.4 23.4 24.0 Total Properties, net $ 64.3 $ 75.9 $ 86.5 Outsourcing assets, net United States $ 19.5 $ 36.0 $ 66.2 Australia 7.8 9.5 16.7 United Kingdom 2.0 17.9 36.3 Other foreign (i) 2.3 3.0 5.4 Total Outsourcing assets, net $ 31.6 $ 66.4 $ 124.6 (i) No other individual country’s revenue, properties, net and outsourcing assets, net exceeded 10% for the years ended December 31, 2023, 2022 and 2021.

Remaining performance obligatio

Remaining performance obligations	12 Months Ended
	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Remaining performance obligations	Contract assets and deferred revenue Contract assets represent rights to consideration in exchange for goods or services transferred to a customer when that right is conditional on something other than the passage of time. Deferred revenue represents contract liabilities. Net contract assets (liabilities) are as follows: As of December 31, 2023 2022 Contract assets - current $ 11.7 $ 28.9 Contract assets - long-term (i) 8.6 11.0 Deferred revenue - current (198.6) (200.7) Deferred revenue - long-term (104.4) (122.3) (i) Reported in other long-term assets on the company’s consolidated balance sheets. Significant changes in the above contract liability balances were as follows: Year ended December 31, 2023 2022 Revenue recognized that was included in deferred revenue at the beginning of the period $ 198.9 $ 235.4 The company’s incremental direct costs of obtaining a contract consist of sales commissions which are deferred and amortized ratably over the initial contract life. These costs are classified as current or noncurrent based on the timing of when the company expects to recognize the expense. The current and noncurrent portions of deferred commissions are included in prepaid expenses, other current assets and in other long-term assets, respectively, in the company’s consolidated balance sheets. Deferred commissions were as follows: As of December 31, 2023 2022 Deferred commissions $ 3.7 $ 4.9 Amortization expense related to deferred commissions was as follows: Year ended December 31, 2023 2022 2021 Deferred commissions - amortization expense (i) $ 1.5 $ 2.9 $ 2.9 (i) Reported in selling, general and administrative expense in the company’s consolidated statements of income (loss). Costs on outsourcing contracts are generally expensed as incurred. However, certain costs incurred upon initiation of an outsourcing contract (costs to fulfill a contract), principally initial customer setup, are capitalized and expensed over the initial contract life. These costs are included in outsourcing assets, net in the company’s consolidated balance sheets, and are amortized over the initial contract life and reported in cost of revenue. Costs to fulfill a contract were as follows: As of December 31, 2023 2022 Costs to fulfill a contract $ 19.2 $ 34.8 Amortization expense related to costs to fulfill a contract was as follows: Year ended December 31, 2023 2022 2021 Costs to fulfill a contract - amortization expense $ 6.7 $ 23.7 $ 27.9 The remaining balance of outsourcing assets, net is comprised of fixed assets and software used in connection with outsourcing contracts. These costs are capitalized and depreciated over the shorter of the initial contract life or in accordance with the company’s fixed asset policy.

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Accounts	SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Millions) Description Balance at Additions Deductions (i) Balance at Allowance for credit losses (deducted from accounts receivable): Year Ended December 31, 2021 $ 9.2 $ (0.6) $ (0.6) $ 8.0 Year Ended December 31, 2022 $ 8.0 $ 0.3 $ 0.8 $ 9.1 Year Ended December 31, 2023 $ 9.1 $ (0.2) $ 0.6 $ 9.5 (i) Includes write-off of bad debts less recoveries, reclassifications from other current liabilities and foreign currency translation adjustments.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pay vs Performance Disclosure
Net loss attributable to Unisys Corporation	$ (430.7)	$ (106)	$ (448.5)

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 31, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Summary of significant accoun_2

Summary of significant accounting policies (Policies)	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Principles of consolidation	Principles of consolidation The consolidated financial statements include the accounts of all majority-owned subsidiaries.
Use of estimates	Use of estimates The preparation of financial statements in conformity with generally accepted accounting principles in the United States of America (GAAP) requires management to make estimates and assumptions about future events. These estimates and assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities and the reported amounts of revenue and expenses. Such estimates include the valuation of estimated credit losses, contract assets, operating lease right-of-use assets, outsourcing assets, marketable software, goodwill, purchased intangibles and other long-lived assets, legal and environmental contingencies, assumptions used in the calculation for systems integration projects, income taxes, and retirement and other post-employment benefits, among others. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. Management adjusts such estimates and assumptions when facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ materially from these estimates. Changes in those estimates resulting from continuing changes in the economic environment such as rising interest rates, inflation, fluctuation in foreign exchange rates and conflicts and other events of geopolitical significance, will be reflected in the financial statements in future periods.
Cash and Cash equivalents	Cash and Cash equivalents
Inventories	Inventories Inventories are valued at the lower of cost and net realizable value. Cost is determined on the first-in, first-out method.
Properties	Properties
Outsourcing assets	Outsourcing assets Costs of outsourcing contracts are generally expensed as incurred. However, certain costs incurred upon initiation of an outsourcing contract (principally initial customer setup) are deferred and expensed over the initial contract life. Fixed assets and software used in connection with outsourcing contracts are capitalized and depreciated over the shorter of the initial contract life or in accordance with the fixed asset policy described above.
Marketable software	Marketable software The cost of development of computer software to be sold or leased, incurred subsequent to establishment of technological feasibility, is capitalized and amortized to cost of sales over the estimated revenue-producing lives of the products. For the company’s proprietary enterprise software products, the amortization period is five years following product release, and for the remaining products, the amortization period is three years following product release. In assessing the estimated revenue-producing lives and recoverability of the products, the company considers operating strategies, underlying
Internal-use software	Internal-use software The company capitalizes certain internal and external costs incurred to acquire or create internal-use software, principally related to software coding, designing system interfaces, and installation and testing of the software. These costs are amortized in accordance with the fixed asset policy described above.
Goodwill and Purchased Intangible Assets	Goodwill and Purchased Intangible Assets Goodwill arising from the acquisition of an entity represents the excess of the purchase price consideration over the fair value of the underlying identifiable intangible assets and net assets or liabilities assumed. Goodwill is initially recognized as an asset and is subsequently measured at cost less any accumulated impairment losses. The company reviews goodwill for impairment annually in the fourth quarter using data as of September 30 of that year, as well as whenever there are events or changes in circumstances (triggering events) that would more likely than not reduce the fair value of one or more reporting units below its respective carrying amount. The company initially assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. This qualitative assessment considers all relevant factors specific to the reporting units, including macroeconomic conditions, industry and market considerations, overall financial performance, changes in share price and relevant entity-specific events. If the company determines that it is not more likely that the carrying amount for a reporting unit is less than its fair value, then subsequent quantitative goodwill impairment testing is not required. If the company determines that it is more likely than not that the carrying amount for a reporting unit is greater than its fair value, then it proceeds with a subsequent quantitative goodwill impairment test. Under the quantitative test, the company compares the fair value of each of its reporting units to their respective carrying value. If the carrying value exceeds fair value, an impairment charge is recognized for the difference. Impaired goodwill is written down to its fair value through a charge to the consolidated statement of income (loss) in the period the impairment is identified. During the fourth quarter of 2023, the company performed a quantitative goodwill impairment test for each reporting unit, and estimated the fair value of the reporting units using both the income approach and the market approach. The income approach incorporates the use of a discounted cash flow method in which the estimated future cash flows and terminal values for each reporting unit are discounted to present value. Cash flow projections are based on management’s estimates of economic and market conditions, which drive key assumptions of revenue growth rates, operating margins, capital expenditures and working capital requirements. The discount rate in turn is based on various market factors and specific risk characteristics of each reporting unit. The market approach estimates fair value by applying performance metric multiples to the reporting unit’s prior and expected operating performance. The multiples are derived from comparable publicly traded companies with similar operating and investment characteristics as the reporting unit. If the fair value of the reporting unit derived using the income approach is significantly different from the fair value estimate using the market approach, the company reevaluates its assumptions used in the two models. When considering the weighting between the market approach and income approach, the company gives more weighting to the income approach. The higher weighting assigned to the income approach takes into consideration that the guideline companies used in the market approach generally represent larger diversified companies relative to the reporting units and may have different long-term growth prospects, among other factors. In order to assess the reasonableness of the calculated reporting unit fair values, the company also compares the sum of the reporting units’ fair values to its market capitalization (per share stock price multiplied by shares outstanding) and calculates an implied control premium (the excess of the sum of the reporting units’ fair values over the market capitalization). The company’s quantitative assessment in the fourth quarter of 2023 indicated that each reporting unit’s fair value exceeded its carrying value, as such no impairment charge was recognized as of December 31, 2023. All reporting units had a fair value in excess of book value. Estimating the fair value of reporting units requires the use of estimates and significant judgments that are based on a number of factors including actual operating results. It is reasonably possible that the judgments and estimates described above could change in future periods, which could have a significant impact on the fair value of the related reporting units. The company continuously monitors and evaluates relevant events and circumstances that could unfavorably impact the significant assumptions noted above, including changes to U.S. treasury rates and equity risk premiums, tax rates, recent market valuations from transactions by comparable companies, volatility in the company’s market capitalization, and general industry, market and macro-economic conditions. It is possible that future changes in such circumstances or in the inputs and assumptions used in estimating the fair value of the reporting units, could require the company to record a non-cash impairment charge. Finite-lived intangible assets purchased in a business combination are recorded at fair value and amortized to cost of revenue - technology and selling, general and administrative expense over their estimated useful lives. Finite-lived intangible assets are tested for impairment whenever events or changes in circumstances would indicate that the carrying value may not be recoverable. An impairment charge would be recognized if the carrying value exceeds fair value in the consolidated statement of income (loss) in the period the impairment is identified.
Retirement benefits	Retirement benefits Accounting rules covering defined benefit pension plans and other postretirement benefits require that amounts recognized in financial statements be determined on an actuarial basis. Management develops the actuarial assumptions used by its U.S. and international defined benefit pension plan obligations based upon the circumstances of each particular plan. The determination of the defined benefit pension plan obligations requires the use of estimates. A significant element in determining the company’s retirement benefits expense or income is the expected long-term rate of return on plan assets. This expected return is an assumption as to the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the projected pension benefit obligation. The company applies this assumed long-term rate of return to a calculated value of plan assets, which recognizes changes in the fair value of plan assets in a systematic manner over four years. This produces the expected return on plan assets that is included in retirement benefits expense or income. The difference between this expected return and the actual return on plan assets is deferred. The net deferral of past asset losses or gains affects the calculated value of plan assets and, ultimately, future retirement benefits expense or income. At December 31 of each year, the company determines the fair value of its retirement benefits plan assets as well as the discount rate to be used to calculate the present value of plan liabilities. Management’s significant assumption used in the determination of the defined benefit pension plan obligations with respect to the U.S. pension plans, is the discount rate. Inherent in deriving the discount rate are significant assumptions with respect to the timing and magnitude of expected benefit payment obligations. The discount rate is an estimate of the interest rate at which the retirement benefits could be effectively settled. In estimating the discount rate, the company looks to rates of return on high-quality, fixed-income investments currently available and expected to be available during the period to maturity of the retirement benefits. The company uses a portfolio of fixed-income securities, which receive at least the second-highest rating given by a recognized ratings agency.
Environmental matters	Environmental matters The company is responsible for certain environmental matters including environmental investigations and remedial activities related to various facilities formerly owned or operated by the company or its predecessors. The company records an estimated environmental liability when it is probable that a liability has been incurred and the amount is reasonably estimable based primarily on the expected costs of pending investigations, current remediation activities, environmental studies and other estimated costs within the identified sites. The company records a claim for recovery from third parties when its realization is probable. Both the liability and claim for recovery are recorded on a non-discounted basis. Provisions for these matters are difficult to estimate due to unknown environmental conditions, including early stages of investigation in some cases, and changes in governmental laws, regulations and in cleanup technologies. As the company continues to perform investigation activities and if events and circumstances change, the company may incur future additional costs, which could have a material impact on the company’s results of operations, financial condition and cash flows.
Noncontrolling interest	Noncontrolling interest The company owns a fifty-one percent interest in Intelligent Processing Solutions Ltd. (iPSL), a U.K. business process outsourcing joint venture. The remaining interests, which are reflected as a noncontrolling interest in the company’s consolidated financial statements, are owned by three financial institutions for which iPSL performs services.
Revenue recognition and Shipping and handling	Revenue recognition Revenue is recognized at an amount that reflects the consideration to which the company expects to be entitled in exchange for transferring goods and services to a customer. The company determines revenue recognition using the following five steps: (1) identify the contract(s) with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) the company satisfies a performance obligation. At contract inception, the company assesses the goods and services promised in a contract with a customer and identifies as a performance obligation each promise to transfer to the customer either: (1) a good or service (or a bundle of goods or services) that is distinct or (2) a series of distinct goods or services that are substantially the same and that have the same pattern of transfer to the customer. The company recognizes revenue only when it satisfies a performance obligation by transferring a promised good or service to a customer. The company must apply its judgment to determine the timing of the satisfaction of performance obligations as well as the transaction price and the amounts allocated to performance obligations including estimating variable consideration, adjusting the consideration for the effects of the time value of money and assessing whether an estimate of variable consideration is constrained. Revenue from hardware sales is recognized upon the transfer of control to a customer, which is defined as an entity’s ability to direct the use of and obtain substantially all of the remaining benefits of an asset. Revenue from software licenses is recognized at the inception of either the initial license term or the inception of an extension or renewal to the license term. Revenue for operating leases is recognized on a monthly basis over the term of the lease and for sales-type leases at the inception of the lease term. Such revenue is not material to the company’s consolidated results of operations. Revenue from equipment and software maintenance and post-contract support is recognized on a straight-line basis as earned over the terms of the respective contracts. Cost related to such contracts is recognized as incurred. Revenue and profit under systems integration contracts are recognized over time as the company transfers control of goods or services. The company measures its progress toward satisfaction of its performance obligations using the cost-to-cost method, or when services have been performed, depending on the nature of the project. For contracts accounted for using the cost-to-cost method, revenue and profit recognized in any given accounting period are based on estimates of total projected contract costs. The estimates are continually reevaluated and revised, when necessary, throughout the life of a contract. Any adjustments to revenue and profit resulting from changes in estimates are accounted for in the period of the change in estimate. When estimates indicate that a loss will be incurred on a contract upon completion, a provision for the expected loss is recorded in the period in which the loss becomes evident. Revenue from such contracts is not material to the company’s consolidated results of operations. In services arrangements, the company typically satisfies the performance obligation and recognizes revenue over time, because the client simultaneously receives and consumes the benefits provided as the company performs the services. The company’s services are provided on a time-and-materials basis, as a fixed-price contract or as a fixed-price per measure of output contract. Revenue from time-and-material contracts is recognized on an output basis as labor hours are delivered. In managed services, application management, business process outsourcing and other cloud-based services arrangements, the arrangement generally consists of a single performance obligation comprised of a series of distinct services that are substantially the same and that have the same pattern of transfer. The company applies a measure of progress (typically time-based) to any fixed consideration and allocates variable consideration to the periods of service, which are typically monthly or quarterly, based on usage. As a result, revenue is recognized over the period the services are provided either on a straight-line basis or on a usage basis, depending on the terms of the arrangement (such as whether the company is standing ready to perform or whether the contract has usage-based metrics). This results in revenue recognition that corresponds with the value to the client of the services transferred to date relative to the remaining services promised. The company also enters into arrangements that may include any combination of hardware, software or services. For example, a client may purchase an enterprise server that includes operating system software. In addition, the arrangement may include post-contract support for the software and a contract for post-warranty maintenance for service of the hardware. These arrangements consist of multiple performance obligations, with control over hardware and software transferred in one reporting period and the software support and hardware maintenance services performed across multiple reporting periods. In another example, the company may provide desktop managed services to a client on a long-term multiple-year basis and periodically sell hardware and license software products to the client. The services are provided on a continuous basis across multiple reporting periods and control over the hardware and software products occurs in one reporting period. The company allocates the total transaction price to be earned under an arrangement among the various performance obligations in proportion to their relative standalone selling prices. The standalone selling price for a performance obligation is the price at which the company would sell a promised good or service separately to a customer. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. For contracts with multiple performance obligations, the company allocates the contract’s transaction price to each performance obligation using its best estimate of the standalone selling price of each distinct good or service in the contract. The primary methods used to estimate standalone selling price are as follows: (1) the expected cost plus margin approach, under which the company forecasts its expected costs of satisfying a performance obligation and then adds an appropriate margin for that distinct good or service and (2) the percent discount off of list price approach. In the Digital Workplace Solutions (DWS) and the Cloud, Applications & Infrastructure Solutions (CA&I) segments, substantially all of the company’s performance obligations are satisfied over time as work progresses and therefore substantially all of the revenue in these segments is recognized over time. The company generally receives payment for these contracts over time as the performance obligations are satisfied. In the Enterprise Computing Solutions (ECS) segment, substantially all of the company’s sales of software and hardware are transferred to customers at a single point in time. Revenue on these contracts is recognized when control over the product is transferred to the customer or a software license term begins. The company generally receives payment for these contracts upon signature or within 30 to 60 days. The company discloses disaggregation of its customer revenue by geographic areas (see Note 20, “Segment information”). The timing of revenue recognition, billings and cash collections results in billed accounts receivable, unbilled receivables, contract assets and deferred revenue (contract liabilities). Revenue excludes taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue producing transaction and collected by the company from a customer (e.g., sales, use and value-added taxes). Revenue includes payments for shipping and handling activities. Shipping and handling Costs related to shipping and handling are included in cost of revenue.
Advertising costs	Advertising costs
Stock-based compensation plans	Stock-based compensation plans Stock-based compensation represents the cost related to stock-based awards granted to employees and directors. Compensation expense for performance-based restricted stock and restricted stock unit awards is recognized as expense ratably for each installment from the date of the grant until the date the restrictions lapse and is based on the fair market value at the date of grant and the probability of achievement of the specific performance-related goals. Compensation expense for market-based awards is recognized as expense ratably over the measurement period, regardless of the actual level of achievement, provided the service requirement is met. The fair value of restricted stock and restricted stock units with time and performance conditions is determined based on the trading price of the company’s common shares on the date of grant. The fair value of awards with market conditions is estimated using a Monte Carlo simulation. The expense is recorded in selling, general and administrative expenses.
Income taxes	Income taxes Income taxes are based on income before taxes for financial reporting purposes and reflect a current tax liability for the estimated taxes payable in the current-year tax returns and changes in deferred taxes. Deferred tax assets or liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using enacted tax laws and rates. A valuation allowance is provided on deferred tax assets if it is determined that it is more likely than not that the asset will not be realized. The company releases the income tax effects of deferred tax balances that have a valuation allowance from accumulated other comprehensive income (loss) once the reason the tax effects were established ceases to exist (e.g., a postretirement plan is liquidated). The company recognizes penalties and interest accrued related to income tax liabilities in provision for income taxes in its consolidated statements of income (loss). The company treats the global intangible low-tax income tax, or GILTI, as a period cost when included in U.S. taxable income, and the base erosion and anti-abuse tax, or BEAT, as a period cost when incurred.
Translation of foreign currency	Translation of foreign currency The local currency is the functional currency for most of the company’s international subsidiaries, and as such, assets and liabilities are translated into U.S. dollars at year-end exchange rates. Income and expense items are translated at average exchange rates during the year. Translation adjustments resulting from changes in exchange rates are reported in other comprehensive income (loss). Exchange gains and losses are reported in other (expense), net. For those international subsidiaries operating in highly inflationary economies, the U.S. dollar is the functional currency, and as such, nonmonetary assets and liabilities are translated at historical exchange rates, and monetary assets and liabilities are translated at current exchange rates. Exchange gains and losses arising from remeasurement are included in other (expense), net.
Fair value measurements	Fair value measurements Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining fair value measurements for assets and liabilities required to be recorded at fair value, the company assumes that the transaction is an orderly transaction that assumes exposure to the market for a period before the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets or liabilities; it is not a forced transaction (for example, a forced liquidation or distress sale). The fair value hierarchy has three levels of inputs that may be used to measure fair value: Level 1 – Quoted prices (unadjusted) in active markets for identical assets or liabilities that the company can access at the measurement date; Level 2 – Inputs other than quoted prices within Level 1 that are observable for the asset or liability, either directly or indirectly; and Level 3 – Unobservable inputs for the asset or liability. The company has applied fair value measurements to its derivatives (see Note 12, “Financial instruments and concentration of credit risks”), long-term debt (see Note 15, “Debt”), and to its postretirement plan assets (see Note 17, “Employee plans”).
Recent accounting pronouncements and accounting changes	Recent accounting pronouncements and accounting changes In November 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures , which enhances reportable segment disclosure requirements including disclosures about significant segment expenses on an annual and interim basis. This update is effective for fiscal years beginning after December 15, 2023, and for interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted and requires application on a retrospective basis. This ASU is not expected to have a material effect on the company’s consolidated financial statements. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740) - Improvements to Income Tax Disclosures. This ASU enhances disclosures relating to the rate reconciliation and requires income taxes paid disclosures disaggregated by jurisdiction among other amendments. This update is effective for annual periods beginning after December 15, 2024, with early adoption permitted and should be applied a prospective basis with a retrospective application permitted. This ASU is not expected to have a material effect on the company’s consolidated financial statements.

Summary of significant accoun_3

Summary of significant accounting policies (Tables)	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Schedule of Cash and Cash Equivalents	The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within the consolidated balance sheets to the total of the amounts shown in the consolidated statements of cash flows. As of December 31, 2023 2022 Cash and cash equivalents $ 387.7 $ 391.8 Restricted cash 9.0 10.9 Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows $ 396.7 $ 402.7
Schedule of Restricted Cash and Cash Equivalents	The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within the consolidated balance sheets to the total of the amounts shown in the consolidated statements of cash flows. As of December 31, 2023 2022 Cash and cash equivalents $ 387.7 $ 391.8 Restricted cash 9.0 10.9 Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows $ 396.7 $ 402.7

Cost-reduction actions (Tables)

Cost-reduction actions (Tables)	12 Months Ended
	Dec. 31, 2023
Restructuring and Related Activities [Abstract]
Schedule of Statement of Income Classifications for Charges (Credits) and Reconciliation of Liabilities and Expected Future Payments	The charges (credits) were recorded in the following statement of income (loss) classifications: Year ended December 31, 2023 2022 2021 Cost of revenue Services $ 4.9 $ 19.1 $ (2.5) Technology 0.7 7.6 7.6 Selling, general and administrative 6.9 24.7 11.1 Research and development 0.5 0.6 3.0 Other (expenses), net (3.7) 2.9 4.0 Total $ 9.3 $ 54.9 $ 23.2 Liabilities and expected future payments related to the company’s workforce reduction actions are as follows: Total U.S. International Balance at December 31, 2020 $ 55.9 $ 13.1 $ 42.8 Additional provisions 12.3 7.9 4.4 Payments (38.5) (13.2) (25.3) Changes in estimates (11.9) (2.1) (9.8) Translation adjustments (1.5) — (1.5) Balance at December 31, 2021 16.3 5.7 10.6 Additional provisions 7.1 3.6 3.5 Payments (11.5) (4.1) (7.4) Changes in estimates 0.4 (1.0) 1.4 Translation adjustments (0.6) — (0.6) Balance at December 31, 2022 11.7 4.2 7.5 Additional provisions 15.2 3.4 11.8 Payments (10.8) (3.5) (7.3) Changes in estimates (6.9) (1.6) (5.3) Translation adjustments 0.2 — 0.2 Balance at December 31, 2023 $ 9.4 $ 2.5 $ 6.9 Expected future payments on balance at December 31, 2023: In 2024 $ 9.4 $ 2.5 $ 6.9

Leases and commitments (Tables)

Leases and commitments (Tables)	12 Months Ended
	Dec. 31, 2023
Leases [Abstract]
Components of Lease Expense and Supplemental Cash Flow Information Related to Leases	The components of lease expense are as follows: Year ended December 31, 2023 2022 2021 Operating lease cost $ 26.0 $ 36.7 $ 39.7 Finance lease cost Amortization of right-of-use assets 0.2 1.2 1.8 Interest on lease liabilities — — 0.1 Total finance lease cost 0.2 1.2 1.9 Short-term lease costs 0.7 0.7 0.9 Variable lease cost 10.3 11.6 11.5 Sublease income (1.1) (1.8) (4.4) Total lease cost $ 36.1 $ 48.4 $ 49.6 Supplemental cash flow information related to leases is as follows: Years ended December 31, 2023 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Cash payments for operating leases included in operating activities $ 31.5 $ 41.0 $ 44.9 Cash payments for finance leases included in financing activities 0.2 1.4 1.9 Cash payments for finance lease included in operating activities — — 0.1 ROU assets obtained in exchange for lease obligations are as follows: Years ended December 31, 2023 2022 Operating leases $ 14.7 $ 17.2
Supplemental Balance Sheet Information Related to Leases	Supplemental balance sheet information related to leases is as follows: As of December 31, 2023 2022 Operating Leases Operating lease right-of-use assets $ 35.4 $ 42.5 Other accrued liabilities 19.1 26.0 Long-term operating lease liabilities 25.6 29.7 Total operating lease liabilities $ 44.7 $ 55.7 Finance Leases Outsourcing assets, net $ 0.1 $ 0.4 Current maturities of long-term debt 0.3 0.7 Long-term debt — 0.4 Total finance lease liabilities $ 0.3 $ 1.1 Weighted-Average Remaining Lease Term (in years) Operating leases 3.5 2.5 Finance leases 0.5 1.4 Weighted-Average Discount Rate Operating leases 8.3 % 6.7 % Finance leases 5.2 % 5.1 %
Maturities of Operating Lease Liabilities	Maturities of lease liabilities as of December 31, 2023 are as follows: Year Finance Leases Operating Leases 2024 $ 0.3 $ 22.7 2025 — 12.6 2026 — 9.1 2027 — 3.4 2028 — 2.0 Thereafter — 4.2 Total lease payments 0.3 54.0 Less imputed interest — 9.3 Total $ 0.3 $ 44.7
Maturities of Finance Lease Liabilities	Maturities of lease liabilities as of December 31, 2023 are as follows: Year Finance Leases Operating Leases 2024 $ 0.3 $ 22.7 2025 — 12.6 2026 — 9.1 2027 — 3.4 2028 — 2.0 Thereafter — 4.2 Total lease payments 0.3 54.0 Less imputed interest — 9.3 Total $ 0.3 $ 44.7
Schedule of Receivables Under Sales-Type Leases Before Allowance for Unearned Income	As of December 31, 2023, receivables under sales-type leases before the allowance for unearned income were collectible as follows: Year 2024 $ 8.7 2025 19.4 2026 2.7 2027 0.7 2028 — Thereafter — Total $ 31.5

Other (expense), net (Tables)

Other (expense), net (Tables)	12 Months Ended
	Dec. 31, 2023
Other Income and Expenses [Abstract]
Schedule of Other (Expense) Net	Other (expense), net is comprised of the following: Year ended December 31, 2023 2022 2021 Postretirement expense* $ (387.1) $ (43.2) $ (548.6) Foreign exchange losses** (0.2) (6.8) (2.5) Environmental costs and other, net*** (6.6) (32.4) (29.2) Total other (expense), net $ (393.9) $ (82.4) $ (580.3) *Includes $348.9 million of settlement losses in 2023 and $499.4 million of settlement losses in 2021 related to the company’s defined benefit pension plans. See Note 17, “Employee plans.” **Includes (credits) charges of $(3.7) million, $2.9 million and $4.0 million respectively, in 2023, 2022 and 2021 for net foreign currency (gains) losses related to substantial completion of liquidation of foreign subsidiaries. ***Environmental costs relate to previously disposed businesses.

Income taxes (Tables)

Income taxes (Tables)	12 Months Ended
	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Schedule of Income (Loss) from Continuing Operations before Income Taxes and Provision (Benefit) for Income Taxes	Following is the total loss before income taxes and the provision (benefit) for income taxes. Year ended December 31, 2023 2022 2021 Income (loss) before income taxes United States $ (545.5) $ (177.2) $ (443.5) Foreign 197.7 114.6 (18.2) Total loss before income taxes $ (347.8) $ (62.6) $ (461.7) Provision (benefit) for income taxes Current United States $ 8.8 $ 15.9 $ 9.1 Foreign 46.0 34.7 38.1 Total 54.8 50.6 47.2 Deferred Foreign 24.5 (8.3) (59.1) Total provision (benefit) for income taxes $ 79.3 $ 42.3 $ (11.9)
Schedule of Reconciliation of Provision (Benefit) for Income Taxes	Following is a reconciliation of the benefit for income taxes at the United States statutory tax rate to the provision (benefit) for income taxes as reported: Year ended December 31, 2023 2022 2021 United States statutory income tax benefit $ (73.0) $ (13.2) $ (96.9) Income and losses for which no provision or benefit has been recognized 123.2 40.9 91.1 Foreign rate differential and other foreign tax expense 12.7 6.4 0.4 Income tax withholdings 14.0 19.7 13.5 Permanent items (3.0) (2.1) (1.8) Change in uncertain tax positions 3.8 0.4 (0.3) Change in valuation allowances 2.1 (9.8) (0.8) U.S. income tax benefit (0.6) — — Other 0.1 — — Enacted rate changes — — (17.1) Provision (benefit) for income taxes $ 79.3 $ 42.3 $ (11.9)
Schedule of Significant Portions of Deferred Tax Assets and Liabilities	The tax effects of temporary differences and carryforwards that give rise to significant portions of deferred tax assets and liabilities were as follows: As of December 31, 2023 2022 Deferred tax assets Tax loss carryforwards $ 813.0 $ 825.5 Postretirement benefits 183.0 149.6 Foreign tax credit carryforwards 83.6 109.2 Other tax credit carryforwards 29.1 32.7 Deferred revenue 31.9 28.2 Employee benefits and compensation 31.5 21.2 Purchased capitalized software 19.4 16.9 Depreciation 33.0 32.6 Warranty, bad debts and other reserves 7.6 7.1 Capitalized costs 9.0 6.2 Other 57.6 49.9 1,298.7 1,279.1 Valuation allowance (1,150.1) (1,110.5) Total deferred tax assets $ 148.6 $ 168.6 Deferred tax liabilities Capitalized research and development $ 10.4 $ 31.0 Other 25.1 29.2 Total deferred tax liabilities $ 35.5 $ 60.2 Net deferred tax assets $ 113.1 $ 108.4
Summary of Valuation Allowance	Changes in the valuation allowance was as follows: Year ended December 31, 2023 2022 2021 Valuation allowance, at beginning of year $ (1,110.5) $ (1,226.2) $ (1,271.5) Actuarial pension adjustments 84.5 70.7 99.5 Expired net operating losses/tax credits 42.9 52.3 50.0 Foreign exchange (6.8) 14.8 18.4 Recognition of income tax benefit (expense) (i) (125.9) (43.9) (102.1) Other (34.3) 21.8 (20.5) Valuation allowance, at end of year $ (1,150.1) $ (1,110.5) $ (1,226.2) (i) Includes U.S. pension activity of $(95.9) million, ($11.3) million and ($84.9) million for the years ended December 31, 2023, 2022 and 2021, respectively.
Schedule of Tax Effected Tax Loss Carryforwards	The company has tax effected tax loss carryforwards as follows: As of December 31, 2023 U.S. Federal $ 366.0 State and local 180.2 Foreign 266.8 Total tax loss carryforwards $ 813.0 These carryforwards will expire as follows: Year 2024 $ 13.4 2025 20.8 2026 15.6 2027 40.8 2028 93.1 Thereafter 358.2 Unlimited 271.1 Total $ 813.0
Schedule of Tax Credit Carryforwards	The company also has available tax credit carryforwards, which will expire as follows: Year 2024 $ 22.5 2025 20.7 2026 33.7 2027 9.1 2028 0.3 Thereafter 26.4 Total $ 112.7
Schedule of Cash Paid for Income Taxes, Net of Refunds	Cash paid for income taxes, net of refunds was as follows: Year ended December 31, 2023 2022 2021 Cash paid for income taxes, net of refunds $ 63.4 $ 49.0 $ 53.7
Schedule of Reconciliation of Changes in Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows: Year ended December 31, 2023 2022 2021 Balance at January 1 $ 17.8 $ 21.6 $ 30.9 Additions based on tax positions related to the current year 4.6 1.9 3.5 Changes for tax positions of prior years 2.6 1.2 (8.8) Reductions as a result of a lapse of applicable statute of limitations (4.6) (5.4) (2.6) Settlements — — (0.3) Changes due to foreign currency 0.5 (1.5) (1.1) Balance at December 31 $ 20.9 $ 17.8 $ 21.6

Earnings (loss) per common sh_2

Earnings (loss) per common share (Tables)	12 Months Ended
	Dec. 31, 2023
Earnings Per Share [Abstract]
Schedule of Computation of Earnings (Loss) Per Common Share Attributable to Unisys Corporation	The following table shows how loss per common share attributable to Unisys Corporation was computed for the three years ended December 31, 2023 (shares in thousands). Year ended December 31, 2023 2022 2021 Basic loss per common share computation: Net loss attributable to Unisys Corporation $ (430.7) $ (106.0) $ (448.5) Weighted average shares 68,254 67,665 66,451 Basic loss per common share $ (6.31) $ (1.57) $ (6.75) Diluted loss per common share computation: Net loss attributable to Unisys Corporation $ (430.7) $ (106.0) $ (448.5) Weighted average shares 68,254 67,665 66,451 Plus incremental shares from assumed conversions of employee stock plans — — — Adjusted weighted average shares 68,254 67,665 66,451 Diluted loss per common share $ (6.31) $ (1.57) $ (6.75) Anti-dilutive weighted-average restricted stock units (i) 945 481 871 Anti-dilutive weighted-average common shares issuable upon conversion of the 5.50% convertible senior notes (i) (see Note 15, “Debt”) — — 557 (i) Amounts represent shares excluded from the computation of diluted earnings per share, as their effect, if included, would have been anti-dilutive for the periods presented.

Contract assets and deferred _2

Contract assets and deferred revenue (Tables)	12 Months Ended
	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Schedule of Net Contract Assets (Liabilities)	Net contract assets (liabilities) are as follows: As of December 31, 2023 2022 Contract assets - current $ 11.7 $ 28.9 Contract assets - long-term (i) 8.6 11.0 Deferred revenue - current (198.6) (200.7) Deferred revenue - long-term (104.4) (122.3) (i) Reported in other long-term assets on the company’s consolidated balance sheets. Significant changes in the above contract liability balances were as follows: Year ended December 31, 2023 2022 Revenue recognized that was included in deferred revenue at the beginning of the period $ 198.9 $ 235.4

Capitalized contract costs (Tab

Capitalized contract costs (Tables)	12 Months Ended
	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Schedule of Deferred Commissions, Costs to Fulfill a Contract, and Amortization Expense	Deferred commissions were as follows: As of December 31, 2023 2022 Deferred commissions $ 3.7 $ 4.9 Amortization expense related to deferred commissions was as follows: Year ended December 31, 2023 2022 2021 Deferred commissions - amortization expense (i) $ 1.5 $ 2.9 $ 2.9 (i) Reported in selling, general and administrative expense in the company’s consolidated statements of income (loss). Costs to fulfill a contract were as follows: As of December 31, 2023 2022 Costs to fulfill a contract $ 19.2 $ 34.8 Amortization expense related to costs to fulfill a contract was as follows: Year ended December 31, 2023 2022 2021 Costs to fulfill a contract - amortization expense $ 6.7 $ 23.7 $ 27.9

Financial instruments and con_2

Financial instruments and concentration of credit risks (Tables)	12 Months Ended
	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Schedule of Fair Value by Balance Sheet Location	The following table summarizes the fair value of the company’s foreign exchange forward contracts. As of December 31, 2023 2022 Balance Sheet Location Prepaid expenses and other current assets $ 9.0 $ 7.9 Other accrued liabilities 0.1 1.3 Total fair value $ 8.9 $ 6.6
Schedule of Gains and Losses Recognized on Foreign Exchange Forward Contracts	The following table summarizes the location and amount of gains (losses) recognized on foreign exchange forward contracts. Year Ended December 31, 2023 2022 2021 Statement of Income Location Other (expense), net $ 13.5 $ (39.3) $ (18.8)

Properties (Tables)

Properties (Tables)	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Schedule of Components of Properties	Properties comprise the following: As of December 31, 2023 2022 Buildings $ 0.3 $ 0.3 Machinery and office equipment 211.5 232.6 Internal-use software 177.1 170.9 Rental equipment 7.5 7.0 Total properties $ 396.4 $ 410.8

Goodwill and intangible assets

Goodwill and intangible assets (Tables)	12 Months Ended
	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Changes in Carrying Amount of Goodwill by Segment	Changes in the carrying amount of goodwill by reporting unit were as follows: Total DWS CA&I ECS Other Balance at December 31, 2021 $ 315.0 $ 140.9 $ 65.5 $ 98.3 $ 10.3 Acquisition - Measurement period adjustments (i) (27.5) — (27.5) — — Translation adjustments (0.4) (0.4) — — — Balance at December 31, 2022 287.1 140.5 38.0 98.3 10.3 Translation adjustments 0.3 0.3 — — — Balance at December 31, 2023 $ 287.4 $ 140.8 $ 38.0 $ 98.3 $ 10.3 (i) Includes a measurement period adjustment that decreased goodwill by $27.5 million related to a prior period acquisition.
Schedule of Intangible Assets, Net	Intangible assets, net at December 31, 2023 and 2022 consists of the following: As of December 31, 2023 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Technology (i) $ 10.0 $ 8.1 $ 1.9 Customer relationships (ii) 54.2 14.1 40.1 Marketing (ii) 1.3 0.6 0.7 Total $ 65.5 $ 22.8 $ 42.7 As of December 31, 2022 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Technology (i) $ 10.0 $ 4.9 $ 5.1 Customer relationships (ii)(iii) 54.2 7.9 46.3 Marketing (ii) 1.3 0.3 1.0 Total $ 65.5 $ 13.1 $ 52.4 (i) Amortization expense is included within cost of revenue - technology in the consolidated statements of income (loss). (ii) Amortization expense is included within selling, general and administrative expense in the consolidated statements of income (loss). (iii) Customer relationships include a measurement period adjustment that increased the fair value of the acquired intangible assets by $27.6 million related to a prior period acquisition.
Schedule of Future Amortization of Intangible Assets	The future amortization relating to acquired intangible assets at December 31, 2023 was estimated as follows: Year Future Amortization Expense 2024 $ 7.2 2025 4.3 2026 4.0 2027 4.0 2028 4.0 Thereafter 19.2 Total $ 42.7

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2023
Debt Disclosure [Abstract]
Schedule of Components of Long-term Debt	Long-term debt is comprised of the following: As of December 31, 2023 2022 6.875% senior secured notes due November 1, 2027 (Face value of $485.0 million less unamortized issuance costs of $4.6 million and $5.8 million at December 31, 2023 and 2022, respectively) $ 480.4 $ 479.2 Finance leases 0.3 1.1 Other debt 23.5 32.8 Total 504.2 513.1 Less – current maturities 13.0 17.4 Total long-term debt $ 491.2 $ 495.7
Schedule of Estimated Fair Values of Long-term Debt	Presented below are the estimated fair values of long-term debt. As of December 31, 2023 2022 6.875% senior secured notes due November 1, 2027 $ 437.5 $ 373.0
Schedule of Maturities of Long-term Debt, Including Finance Leases	Maturities of long-term debt, including finance leases, in each of the next five years and thereafter are as follows: Year Total Long-Term Debt Finance Leases 2024 $ 13.0 $ 12.7 $ 0.3 2025 6.6 6.6 — 2026 3.3 3.3 — 2027 481.3 481.3 — Total $ 504.2 $ 503.9 $ 0.3
Schedule of Interest Expense	Cash paid for interest and capitalized interest expense was as follows: Year ended December 31, 2023 2022 2021 Cash paid for interest $ 35.5 $ 36.5 $ 40.1 Capitalized interest expense $ 5.7 $ 5.1 $ 4.5 Interest expense related to the 2027 Notes is comprised of the following: Year ended December 31, 2023 2022 2021 Contractual interest coupon $ 33.3 $ 33.3 $ 33.3 Amortization of issuance costs 1.2 1.2 1.2 Total $ 34.5 $ 34.5 $ 34.5 Interest expense related to the 2021 Notes was as follows: Year ended December 31, 2021 Contractual interest coupon $ 0.8 Amortization of debt discount 0.5 Amortization of debt issuance costs 0.1 Total $ 1.4

Other accrued liabilities (Tabl

Other accrued liabilities (Tables)	12 Months Ended
	Dec. 31, 2023
Other Liabilities Disclosure [Abstract]
Schedule of Other Accrued Liabilities (Current)	Other accrued liabilities (current) are comprised of the following: As of December 31, 2023 2022 Payrolls and commissions $ 124.5 $ 84.8 Income taxes 31.4 41.3 Taxes other than income taxes 27.4 23.2 Accrued vacations 22.4 21.1 Operating leases 19.1 26.0 Postretirement 10.2 11.7 Cost reduction 9.4 11.7 Accrued interest 5.8 5.9 Other 58.2 45.9 Total other accrued liabilities $ 308.4 $ 271.6

Employee plans (Tables)

Employee plans (Tables)	12 Months Ended
	Dec. 31, 2023
Retirement Benefits [Abstract]
Schedule of Restricted Stock Unit Activity	A summary of restricted stock and restricted stock unit (RSU) activity for the year ended December 31, 2023 follows (shares in thousands): Restricted Stock and RSU Weighted-Average Grant-Date Fair Value Outstanding at December 31, 2022 2,230 $ 23.53 Granted 3,881 4.14 Vested (686) 13.26 Forfeited and expired (667) 11.40 Outstanding at December 31, 2023 4,758 9.27
Schedule of Weighted-Average Assumptions	The fair value of awards with market conditions is estimated using a Monte Carlo simulation with the following weighted-average assumptions. Year ended December 31, 2023 2022 Weighted-average fair value of grant $ 7.32 $ 34.14 Risk-free interest rate (i) 4.51 % 1.72 % Expected volatility (ii) 63.63 % 57.71 % Expected life of restricted stock units in years (iii) 2.84 2.85 Expected dividend yield — % — % (i) Represents the continuously compounded semi-annual zero-coupon U.S. treasury rate commensurate with the remaining performance period. (ii) Based on historical volatility for the company that is commensurate with the length of the performance period. (iii) Represents the remaining life of the longest performance period. U.S. Plans International Plans Year ended December 31, 2023 2022 2021 2023 2022 2021 Discount rate 6.04 % 3.18 % 2.85 % 4.80 % 1.73 % 1.23 % Expected long-term rate of return on assets 7.10 % 6.50 % 6.07 % 4.44 % 3.88 % 3.30 % Weighted-average assumptions used to determine benefit obligations at December 31 were as follows: Discount rate 5.70 % 6.04 % 3.18 % 4.24 % 4.80 % 1.73 % Weighted-average assumptions used to determine net periodic postretirement benefit (income) were as follows: Year ended December 31, 2023 2022 2021 Discount rate 5.39 % 2.70 % 2.21 % Expected return on plan assets 5.50 % 5.50 % 5.50 % Weighted-average assumptions used to determine benefit obligation at December 31 were as follows: Year ended December 31, 2023 2022 2021 Discount rate 5.03 % 5.39 % 2.70 %
Schedule of Funded Status of Plan and Amounts Recognized in Consolidated Balance Sheet	Retirement plans’ funded status and amounts recognized in the company’s consolidated balance sheets follows: U.S. Plans International Plans As of December 31, 2023 2022 2023 2022 Change in projected benefit obligation Benefit obligation at beginning of year $ 2,852.9 $ 3,709.6 $ 1,574.6 $ 2,614.4 Service cost — — 1.1 1.9 Interest cost 152.7 114.6 72.3 39.3 Plan participants’ contributions — — 1.2 1.1 Plan settlement (516.1) — (4.5) — Actuarial (gain) loss 80.2 (668.1) 67.7 (726.4) Benefits paid (278.0) (303.2) (80.9) (86.4) Foreign currency translation adjustments — — 83.9 (269.3) Benefit obligation at end of year $ 2,291.7 $ 2,852.9 $ 1,715.4 $ 1,574.6 Change in plan assets Fair value of plan assets at beginning of year $ 2,440.1 $ 3,139.3 $ 1,444.3 $ 2,431.6 Actual return on plan assets 166.1 (401.9) 18.7 (685.7) Employer contribution 5.8 5.9 36.6 33.4 Plan participants’ contributions — — 1.2 1.1 Plan settlement (516.1) — (4.5) — Benefits paid (278.0) (303.2) (80.9) (86.4) Foreign currency translation adjustments — — 70.8 (249.7) Fair value of plan assets at end of year $ 1,817.9 $ 2,440.1 $ 1,486.2 $ 1,444.3 Funded status at end of year $ (473.8) $ (412.8) $ (229.2) $ (130.3) Amounts recognized in the consolidated balance sheets consist of: Prepaid postretirement assets $ 30.7 $ 44.4 $ 7.3 $ 75.1 Other accrued liabilities (5.4) (5.4) (0.2) (0.2) Long-term postretirement liabilities (499.1) (451.8) (236.3) (205.2) Total funded status $ (473.8) $ (412.8) $ (229.2) $ (130.3) Accumulated other comprehensive loss, net of tax Net loss $ 1,514.2 $ 1,845.3 $ 1,037.8 $ 859.7 Prior service credit $ (24.7) $ (27.2) $ (45.0) $ (44.9) Accumulated benefit obligation $ 2,291.7 $ 2,852.9 $ 1,712.5 $ 1,573.0 As of December 31, 2023 2022 Change in accumulated benefit obligation Benefit obligation at beginning of year $ 68.9 $ 81.1 Service cost 0.2 0.2 Interest cost 2.6 1.9 Plan participants’ contributions 0.3 0.9 Actuarial gain (6.9) (16.1) Benefits paid (5.1) (4.9) Foreign currency translation and other adjustments 0.1 5.8 Benefit obligation at end of year $ 60.1 $ 68.9 Change in plan assets Fair value of plan assets at beginning of year $ 5.2 $ 5.6 Actual return on plan assets (2.8) (0.7) Employer contributions 5.6 4.3 Plan participants’ contributions 0.3 0.9 Benefits paid (5.1) (4.9) Fair value of plan assets at end of year $ 3.2 $ 5.2 Funded status at end of year $ (56.9) $ (63.7) Amounts recognized in the consolidated balance sheets consist of: Other accrued liabilities $ (4.6) $ (6.1) Long-term postretirement liabilities (52.3) (57.6) Total funded status $ (56.9) $ (63.7) Accumulated other comprehensive income, net of tax Net income $ (7.6) $ (7.8) Prior service cost (credit) 0.6 (0.7)
Schedule of Accumulated Benefit Obligation in Excess of Plan Assets	Information for defined benefit retirement plans with an accumulated benefit obligation in excess of plan assets follows: As of December 31, 2023 2022 Accumulated benefit obligation $ 3,544.3 $ 3,621.6 Fair value of plan assets $ 2,806.2 $ 2,960.6
Schedule of Projected Benefit Obligation in Excess of Plan Assets	Information for defined benefit retirement plans with a projected benefit obligation in excess of plan assets follows: As of December 31, 2023 2022 Projected benefit obligation $ 3,547.2 $ 3,623.2 Fair value of plan assets $ 2,806.2 $ 2,960.6
Schedule of Components of Net Periodic Cost (Income)	Net periodic pension expense (income) includes the following components: U.S. Plans International Plans Year ended December 31, 2023 2022 2021 2023 2022 2021 Service cost (i) $ — $ — $ — $ 1.1 $ 1.9 $ 3.0 Interest cost 152.7 114.6 117.6 72.3 39.3 36.7 Expected return on plan assets (178.6) (189.8) (199.8) (84.9) (77.4) (81.6) Amortization of prior service credit (2.5) (2.5) (2.5) (2.4) (2.6) (2.8) Recognized net actuarial loss 75.6 125.9 135.6 9.1 37.7 48.3 Settlement losses 348.2 — 288.1 0.7 — 211.3 Net periodic pension expense (income) $ 395.4 $ 48.2 $ 339.0 $ (4.1) $ (1.1) $ 214.9 (i) Service cost is reported in cost of revenue and selling, general and administrative expenses. All other components of net periodic pension expense (income) are reported in other (expense) Net periodic postretirement benefit (income) cost follows: Year ended December 31, 2023 2022 2021 Service cost (i) $ 0.2 $ 0.2 $ 0.4 Interest cost 2.6 1.9 1.8 Expected return on assets (0.3) (0.3) (0.3) Amortization of prior service credit (1.3) (1.4) (1.7) Recognized net actuarial gain (4.0) (2.2) (2.1) Net periodic benefit income $ (2.8) $ (1.8) $ (1.9) (i) Service cost is reported in selling, general and administrative expenses. All other components of net periodic benefit (income) cost are reported in other (expense), net in the consolidated statements of income (loss).
Schedule of Investment Policy Targets and Ranges for Each Asset Category	The company’s investment policy targets and ranges for each asset category are as follows: U.S. International Asset Category Target Range Target Range Equity securities 40 % 35-45% 1 % 0-1% Debt securities 44 % 39-49% 57 % 52-62% Real estate 0 % 0 % 1 % 0-1% Cash 0 % 0-5% 0 % 0-0% Other 16 % 11-21% 41 % 34-49%
Schedule of Assumed Health Care Cost Trend Rates	Assumed health care cost trend rates at December 31, 2023 2022 Health care cost trend rate assumed for next year 7.0 % 7.0 % Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) 4.5 % 4.5 % Year that the rate reaches the ultimate trend rate 2033 2033
Schedule of Expected Future Benefit Payments	As of December 31, 2023, the following benefit payments are expected to be paid from the defined benefit pension plans: Year U.S. International 2024 $ 240.7 $ 93.8 2025 234.8 94.9 2026 228.5 98.2 2027 221.7 100.6 2028 213.8 102.1 2029 - 2033 932.0 531.1 As of December 31, 2023, the following benefits are expected to be paid from the company’s postretirement plans: Year Expected 2024 $ 5.2 2025 4.6 2026 4.4 2027 4.1 2028 3.9 2029 – 2033 16.8
Schedule of Plan Assets (Liabilities) at Fair Value	The following table sets forth by level, within the fair value hierarchy, the plans’ assets (liabilities) at fair value at December 31, 2023. U.S. Plans International Plans As of December 31, 2023 Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Pension plans Equity Securities Common Stocks $ 361.5 $ 360.6 $ 0.9 $ — $ — $ — $ — $ — Commingled Funds 227.9 227.9 Debt Securities U.S. Govt. Securities 289.8 289.8 Other Fixed Income 245.1 245.1 360.3 360.3 Insurance Contracts 510.6 510.6 Commingled Funds 127.4 127.4 16.1 16.1 Real Estate Real Estate Investment Trusts 34.6 34.6 Other Derivatives (i) 89.9 68.1 21.8 (3.4) (3.4) Commingled Funds 13.2 13.2 Pooled Funds 80.0 80.0 12.0 12.0 Cumulative futures contracts variation margin paid to brokers (67.4) (67.4) Cash 1.6 1.6 37.9 37.9 Receivables 10.8 10.8 — — Payables (19.0) (19.0) — — Total plan assets in fair value hierarchy $ 1,382.2 $ 679.1 $ 703.1 $ — $ 946.7 $ 37.9 $ 398.2 $ 510.6 Plan assets measured using NAV as a practical expedient (ii): Commingled Funds Debt $ 102.3 $ 191.4 Other 96.8 348.1 Private Real Estate 188.9 Private Equity 47.7 Total pension plan assets $ 1,817.9 $ 1,486.2 Other postretirement plans Insurance Contracts $ 3.2 $ 3.2 (i) Level 1 derivatives represent unrealized appreciation or depreciation on open futures contracts. The value of open futures contracts includes derivatives and the cumulative futures contracts variation margin paid to or received from brokers. (ii) Investments measured at fair value using NAV as a practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets. The following table sets forth by level, within the fair value hierarchy, the plans’ assets (liabilities) at fair value at December 31, 2022. U.S. Plans International Plans As of December 31, 2022 Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Pension plans Equity Securities Common Stocks $ 544.6 $ 543.2 $ 1.4 $ — $ — $ — $ — $ — Commingled Funds 383.2 383.2 Debt Securities U.S. Govt. Securities 291.7 291.7 Other Fixed Income 293.8 293.8 2.8 2.8 Insurance Contracts 100.3 100.3 Commingled Funds 185.5 185.5 126.5 126.5 Real Estate Real Estate Investment Trusts 87.1 87.1 Other Derivatives (i) 95.0 (4.7) 99.7 Commingled Funds 15.0 15.0 Pooled Funds 92.1 92.1 25.3 25.3 Cumulative futures contracts variation margin received from brokers 5.3 5.3 Cash 0.8 0.8 20.5 20.5 Receivables 9.3 9.3 120.9 120.9 Payables (42.5) (42.5) (0.2) (0.2) Total plan assets in fair value hierarchy $ 1,945.9 $ 890.2 $ 1,055.7 $ — $ 411.1 $ 141.2 $ 169.6 $ 100.3 Plan assets measured using NAV as a practical expedient (ii): Commingled Funds Debt $ 65.0 $ 788.8 Other 147.4 244.4 Private Real Estate 238.9 Private Equity 42.9 Total pension plan assets $ 2,440.1 $ 1,444.3 Other postretirement plans Insurance Contracts $ 5.2 $ 5.2 (i) Level 1 derivatives represent unrealized appreciation or depreciation on open futures contracts. The value of open futures contracts includes derivatives and the cumulative futures contracts variation margin received from brokers. (ii) Investments measured at fair value using NAV as a practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table for these investments are included to permit reconciliation of the fair value hierarchy to the total plan assets.
Schedule of Changes in Fair Value of Plans Assets	The following tables set forth a summary of changes in the fair value of the plans’ Level 3 assets for the years ended December 31, 2023 and 2022. January 1, 2023 Realized Purchases Sales Currency and unrealized gains (losses) relating to instruments still held at December 31, 2023 December 31, 2023 U.S. plans Other postretirement plans Insurance Contracts $ 5.2 $ (2.8) $ 0.8 $ — $ — $ 3.2 International pension plans Insurance Contracts $ 100.3 $ — $ 375.6 $ (13.8) $ 48.5 $ 510.6 January 1, 2022 Realized Purchases Sales Currency and unrealized gains (losses) relating to instruments still held at December 31, 2022 December 31, 2022 U.S. plans Other postretirement plans Insurance Contracts $ 5.6 $ (0.7) $ 0.3 $ — $ — $ 5.2 International pension plans Insurance Contracts $ 110.2 $ — $ 5.2 $ (10.0) $ (5.1) $ 100.3
Schedule of Additional Information about Plan Assets Valued Using Net Asset Value	The following table presents additional information about plan assets valued using the net asset value as a practical expedient within the fair value hierarchy table. 2023 2022 Fair Value Unfunded Commit-ments Redemption Frequency Redemption Notice Period Range Fair Value Unfunded Commit-ments Redemption Frequency Redemption Notice Period Range U.S. plans Commingled Funds Debt $ 102.3 $ — Daily, Monthly 15-45 days $ 65.0 $ — Monthly 45 days Other 96.8 — Monthly, Quarterly 5-90 days 147.4 — Monthly, Quarterly 5-90 days Private Real Estate (i) 188.9 — Quarterly 60-90 days 238.9 — Quarterly 60-90 days Private Equity (ii) 47.7 23.3 42.9 28.4 Total $ 435.7 $ 23.3 $ 494.2 $ 28.4 International pension plans Commingled Funds Debt $ 191.4 $ 42.1 Never $ 788.8 $ 73.7 Weekly, Monthly, Quarterly Up to 120 days Other 348.1 — Bimonthly 10 days 244.4 — Bimonthly 10 days Total $ 539.5 $ 42.1 $ 1,033.2 $ 73.7 (i) Includes investments in private real estate funds. The funds invest in U.S. real estate and allow redemptions quarterly, though queues, restrictions and gates may extend the period. A redemption has been requested from three funds, which have a redemption queue with estimates of full receipt of three (ii)

Stockholders' equity (Tables)

Stockholders' equity (Tables)	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	Accumulated other comprehensive loss is as follows: Total Translation Postretirement Balance at December 31, 2020 $ (3,939.5) $ (826.6) $ (3,112.9) Other comprehensive income (loss) before reclassifications 58.6 (43.6) 102.2 Amounts reclassified from accumulated other comprehensive loss 616.8 4.0 612.8 Current period other comprehensive income (loss) 675.4 (39.6) 715.0 Balance at December 31, 2021 (3,264.1) (866.2) (2,397.9) Other comprehensive income (loss) before reclassifications 38.0 (114.1) 152.1 Amounts reclassified from accumulated other comprehensive loss 150.1 2.9 147.2 Current period other comprehensive income (loss) 188.1 (111.2) 299.3 Balance at December 31, 2022 (3,076.0) (977.4) (2,098.6) Other comprehensive (loss) income before reclassifications (142.8) 68.3 (211.1) Amounts reclassified from accumulated other comprehensive loss 418.5 (3.7) 422.2 Current period other comprehensive income 275.7 64.6 211.1 Balance at December 31, 2023 $ (2,800.3) $ (912.8) $ (1,887.5)
Schedule of Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss)	Amounts reclassified out of accumulated other comprehensive loss are as follows: Year ended December 31, 2023 2022 2021 Translation adjustments: Adjustment for substantial completion of liquidation of foreign subsidiaries (i) $ (3.7) $ 2.9 $ 4.0 Postretirement plans (ii) : Amortization of prior service credit (5.4) (5.8) (6.2) Amortization of actuarial losses 80.5 159.0 178.9 Settlement losses 348.9 — 499.4 Total before tax 420.3 156.1 676.1 Income tax (1.8) (6.0) (59.3) Total reclassifications for the period $ 418.5 $ 150.1 $ 616.8 (i) Reported in other (expense), net in the consolidated statements of income (loss). (ii) Included in net periodic postretirement cost (see Note 17, “Employee plans”).
Schedule of Changes in Common Stock and Treasury Stock	The following table summarizes the changes in shares of common stock and treasury stock: Common Treasury Balance at December 31, 2020 66.8 3.8 Debt exchange 4.6 1.2 Stock-based compensation 1.1 0.3 Balance at December 31, 2021 72.5 5.3 Stock-based compensation 0.8 0.2 Balance at December 31, 2022 73.3 5.5 Stock-based compensation 0.7 0.1 Balance at December 31, 2023 74.0 5.6

Segment information (Tables)

Segment information (Tables)	12 Months Ended
	Dec. 31, 2023
Segment Reporting [Abstract]
Schedule of Operations by Business Segment	A summary of the company’s operations by segment is presented below: Total Segments DWS CA&I ECS 2023 Customer revenue $ 1,725.1 $ 546.1 $ 531.0 $ 648.0 Intersegment — — — — Total revenue $ 1,725.1 $ 546.1 $ 531.0 $ 648.0 Gross profit $ 554.7 $ 76.2 $ 81.9 $ 396.6 Depreciation and amortization $ 121.8 $ 29.2 $ 29.8 $ 62.8 Total assets $ 1,196.6 $ 379.2 $ 249.6 $ 567.8 Capital expenditures $ 65.9 $ 3.9 $ 7.1 $ 54.9 2022 Customer revenue $ 1,699.9 $ 509.9 $ 520.3 $ 669.7 Intersegment — — — — Total revenue $ 1,699.9 $ 509.9 $ 520.3 $ 669.7 Gross profit $ 550.8 $ 71.5 $ 47.3 $ 432.0 Depreciation and amortization $ 159.2 $ 38.9 $ 42.3 $ 78.0 Total assets $ 1,190.6 $ 346.5 $ 268.3 $ 575.8 Capital expenditures $ 68.4 $ 6.3 $ 6.5 $ 55.6 2021 Customer revenue $ 1,745.8 $ 574.5 $ 485.6 $ 685.7 Intersegment 1.4 — — 1.4 Total revenue $ 1,747.2 $ 574.5 $ 485.6 $ 687.1 Gross profit $ 562.3 $ 79.3 $ 47.2 $ 435.8 Depreciation and amortization $ 129.1 $ 18.6 $ 55.0 $ 55.5 Total assets $ 1,237.2 $ 353.5 $ 289.6 $ 594.1 Capital expenditures $ 78.9 $ 13.5 $ 13.2 $ 52.2
Schedule of Reconciliation of Revenue from Segments to Consolidated	Presented below is a reconciliation of total segment revenue to total consolidated revenue: Year ended December 31, 2023 2022 2021 Total segment revenue $ 1,725.1 $ 1,699.9 $ 1,747.2 Other revenue 290.3 280.0 308.6 Elimination of intercompany revenue — — (1.4) Total consolidated revenue $ 2,015.4 $ 1,979.9 $ 2,054.4
Schedule of Reconciliation of Segment Gross Profit to Consolidated Income (Loss) From Continuing Operations Before Income Taxes	Presented below is a reconciliation of total segment gross profit to total consolidated loss before income taxes: Year ended December 31, 2023 2022 2021 Total segment gross profit $ 554.7 $ 550.8 $ 562.3 Other gross profit (loss) (3.4) (21.2) 9.7 Total gross profit 551.3 529.6 572.0 Selling, general and administrative expense (450.3) (453.2) (389.5) Research and development expense (24.1) (24.2) (28.5) Interest expense (30.8) (32.4) (35.4) Other (expense), net (393.9) (82.4) (580.3) Total loss before income taxes $ (347.8) $ (62.6) $ (461.7)
Schedule of Reconciliation of Total Business Segment Assets to Consolidated Assets	Presented below is a reconciliation of total business segment assets to consolidated assets: As of December 31, 2023 2022 2021 Total segment assets $ 1,196.6 $ 1,190.6 $ 1,237.2 Other assets 82.1 96.8 206.9 Cash and cash equivalents 387.7 391.8 552.9 Deferred income taxes 114.0 118.6 125.3 Operating lease right-of-use assets 35.4 42.5 62.7 Prepaid postretirement assets 38.0 119.5 159.7 Other corporate assets 111.6 105.8 74.8 Total assets $ 1,965.4 $ 2,065.6 $ 2,419.5
Schedule of Revenue by Geographic Segment	Geographic information about the company’s revenue, which is principally based on location of the selling organization, properties and outsourcing assets, is presented below: Year ended December 31, 2023 2022 2021 Revenue United States $ 889.0 $ 854.9 $ 856.2 United Kingdom 289.3 228.0 284.9 Other foreign (i) 837.1 897.0 913.3 Total Revenue $ 2,015.4 $ 1,979.9 $ 2,054.4 Properties, net United States $ 45.9 $ 52.5 $ 62.5 Other foreign (i) 18.4 23.4 24.0 Total Properties, net $ 64.3 $ 75.9 $ 86.5 Outsourcing assets, net United States $ 19.5 $ 36.0 $ 66.2 Australia 7.8 9.5 16.7 United Kingdom 2.0 17.9 36.3 Other foreign (i) 2.3 3.0 5.4 Total Outsourcing assets, net $ 31.6 $ 66.4 $ 124.6 (i) No other individual country’s revenue, properties, net and outsourcing assets, net exceeded 10% for the years ended December 31, 2023, 2022 and 2021.

Summary of significant accoun_4

Summary of significant accounting policies - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Cash and cash equivalents	$ 387.7	$ 391.8
Restricted cash	9	10.9
Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows	$ 396.7	$ 402.7	$ 560.6	$ 906.7

Summary of significant accoun_5

Summary of significant accounting policies - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) financial_institution	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross amount of outsourcing assets	$ 563.4	$ 559.4
Outsourcing assets, accumulated amortization	531.8	493
Gross amount of marketable software	2,213.9	2,174.5
Marketable software, accumulated amortization	$ 2,047.7	2,009.4
Period of recognition in changes in fair value of plan assets	4 years
Advertising costs incurred	$ 10.7	$ 8	$ 3.6
Intelligent Processing Solutions Ltd.
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Ownership interest (as a percent)	51%
Number of financial institutions that own remaining interests for which iPSL performs services | financial_institution	3
Enterprise Software
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated revenue-producing lives of computer software products from the date of release	5 years
Remaining Products
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated revenue-producing lives of computer software products from the date of release	3 years
Minimum | Technology
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Period over which payment is generally received for contracts	30 days
Maximum | Technology
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Period over which payment is generally received for contracts	60 days
Buildings | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives	20 years
Buildings | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives	50 years
Machinery and office equipment | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives	4 years
Machinery and office equipment | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives	7 years
Rental equipment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives	4 years
Internal-use software | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives	3 years
Internal-use software | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful lives	10 years

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
	Jun. 03, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 14, 2021
Business Combination Segment Allocation [Line Items]
Decrease in goodwill			$ 27.5
CompuGain
Business Combination Segment Allocation [Line Items]
Equity interest acquired (as percent)				100%
Purchase price consideration				$ 85.3
Decrease in goodwill		$ 27.5
Acquisition related costs		$ 0.4	1.1
Unify Square, Inc.
Business Combination Segment Allocation [Line Items]
Equity interest acquired (as percent)	100%
Acquisition related costs			$ 2.4
Purchase price consideration	$ 150.4

Cost-reduction actions - Narrat

Cost-reduction actions - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Cost-reduction charges and other costs	$ 9.3	$ 54.9	$ 23.2
Charges (credits) related to work-force reductions	8.3	7.5	0.4
Other charges related to the cost-reduction effort	1	47.4	22.8
Employee severance
Restructuring Cost and Reserve [Line Items]
Cost-reduction charges and other costs	15.2	7.1	12.3
Charges (credits) related to work-force reductions	15.2	7.1	12.3
Changes in estimates
Restructuring Cost and Reserve [Line Items]
Charges (credits) related to work-force reductions	(6.9)	0.4	(11.9)
Professional fees
Restructuring Cost and Reserve [Line Items]
Other charges related to the cost-reduction effort	4.7
Foreign currency (gains) losses related to exiting foreign countries
Restructuring Cost and Reserve [Line Items]
Other charges related to the cost-reduction effort	$ (3.7)	2.9	4
Asset held-for-sale
Restructuring Cost and Reserve [Line Items]
Other charges related to the cost-reduction effort		13.6
Asset impairments
Restructuring Cost and Reserve [Line Items]
Other charges related to the cost-reduction effort		10.9	12.6
Facility lease cost
Restructuring Cost and Reserve [Line Items]
Other charges related to the cost-reduction effort		11.3
Contract exit costs
Restructuring Cost and Reserve [Line Items]
Other charges related to the cost-reduction effort		9.3
Other expenses
Restructuring Cost and Reserve [Line Items]
Other charges related to the cost-reduction effort		$ (0.6)	$ 6.2

Cost-reduction actions - Statem

Cost-reduction actions - Statement of Income Classifications (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Cost-reduction charges and other costs	$ 9.3	$ 54.9	$ 23.2
Cost of revenue | Services
Restructuring Cost and Reserve [Line Items]
Cost-reduction charges and other costs	4.9	19.1	(2.5)
Cost of revenue | Technology
Restructuring Cost and Reserve [Line Items]
Cost-reduction charges and other costs	0.7	7.6	7.6
Selling, general and administrative
Restructuring Cost and Reserve [Line Items]
Cost-reduction charges and other costs	6.9	24.7	11.1
Research and development
Restructuring Cost and Reserve [Line Items]
Cost-reduction charges and other costs	0.5	0.6	3
Other (expenses), net
Restructuring Cost and Reserve [Line Items]
Cost-reduction charges and other costs	$ (3.7)	$ 2.9	$ 4

Cost-reduction actions - Liabil

Cost-reduction actions - Liabilities and Expected Future Payments Related to Work-Force Reduction Actions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Reserve [Roll Forward]
Additional provisions	$ 9.3	$ 54.9	$ 23.2
Work-Force Reductions
Restructuring Reserve [Roll Forward]
Balance at beginning of period	11.7	16.3	55.9
Additional provisions	15.2	7.1	12.3
Payments	(10.8)	(11.5)	(38.5)
Changes in estimates	(6.9)	0.4	(11.9)
Translation adjustments	0.2	(0.6)	(1.5)
Balance at end of period	9.4	11.7	16.3
Expected future payments on balance at December 31, 2023:
In 2024	9.4
Work-Force Reductions | U.S.
Restructuring Reserve [Roll Forward]
Balance at beginning of period	4.2	5.7	13.1
Additional provisions	3.4	3.6	7.9
Payments	(3.5)	(4.1)	(13.2)
Changes in estimates	(1.6)	(1)	(2.1)
Translation adjustments	0	0	0
Balance at end of period	2.5	4.2	5.7
Expected future payments on balance at December 31, 2023:
In 2024	2.5
Work-Force Reductions | International
Restructuring Reserve [Roll Forward]
Balance at beginning of period	7.5	10.6	42.8
Additional provisions	11.8	3.5	4.4
Payments	(7.3)	(7.4)	(25.3)
Changes in estimates	(5.3)	1.4	(9.8)
Translation adjustments	0.2	(0.6)	(1.5)
Balance at end of period	6.9	$ 7.5	$ 10.6
Expected future payments on balance at December 31, 2023:
In 2024	$ 6.9

Leases and commitments - Narrat

Leases and commitments - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Optional extension or renewal term (up to)	5 years
Optional termination period	1 year
Standby letters of credit and surety bonds outstanding	$ 232
Deposits and collateralized assets	$ 8
Minimum
Lessee, Lease, Description [Line Items]
Initial lease terms	1 year
Maximum
Lessee, Lease, Description [Line Items]
Initial lease terms	8 years

Leases and commitments - Compon

Leases and commitments - Components of Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease cost	$ 26	$ 36.7	$ 39.7
Finance lease cost
Amortization of right-of-use assets	0.2	1.2	1.8
Interest on lease liabilities	0	0	0.1
Total finance lease cost	0.2	1.2	1.9
Short-term lease costs	0.7	0.7	0.9
Variable lease cost	10.3	11.6	11.5
Sublease income	(1.1)	(1.8)	(4.4)
Total lease cost	$ 36.1	$ 48.4	$ 49.6

Leases and commitments - Supple

Leases and commitments - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Operating Leases
Operating lease right-of-use assets	$ 35.4	$ 42.5
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accrued liabilities	Other accrued liabilities
Other accrued liabilities	$ 19.1	$ 26
Long-term operating lease liabilities	25.6	29.7
Total operating lease liabilities	$ 44.7	$ 55.7
Finance Leases
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Outsourcing assets, net	Outsourcing assets, net
Outsourcing assets, net	$ 0.1	$ 0.4
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Current maturities of long-term debt	Current maturities of long-term debt
Current maturities of long-term debt	$ 0.3	$ 0.7
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-term debt	Long-term debt
Long-term debt	$ 0	$ 0.4
Total finance lease liabilities	$ 0.3	$ 1.1
Weighted-Average Remaining Lease Term (in years)
Operating leases	3 years 6 months	2 years 6 months
Finance leases	6 months	1 year 4 months 24 days
Weighted-Average Discount Rate
Operating leases (as a percentage)	8.30%	6.70%
Finance Leases (as a percentage)	5.20%	5.10%

Leases and commitments - Supp_2

Leases and commitments - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash paid for amounts included in the measurement of lease liabilities:
Cash payments for operating leases included in operating activities	$ 31.5	$ 41	$ 44.9
Cash payments for finance leases included in financing activities	0.2	1.4	1.9
Cash payments for finance lease included in operating activities	0	0	$ 0.1
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 14.7	$ 17.2

Leases and commitments - Maturi

Leases and commitments - Maturities of Lease Liabilities, Topic 842 (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Finance Leases
2024	$ 0.3
2025	0
2026	0
2027	0
2028	0
Thereafter	0
Total lease payments	0.3
Less imputed interest	0
Total	0.3	$ 1.1
Operating Leases
2024	22.7
2025	12.6
2026	9.1
2027	3.4
2028	2
Thereafter	4.2
Total lease payments	54
Less imputed interest	9.3
Total	$ 44.7	$ 55.7

Leases and commitments - Receiv

Leases and commitments - Receivables Under Sales-Type Lease (Details) $ in Millions	Dec. 31, 2023 USD ($)
Leases [Abstract]
2024	$ 8.7
2025	19.4
2026	2.7
2027	0.7
2028	0
Thereafter	0
Total	$ 31.5

Other (expense), net (Details)

Other (expense), net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Intercompany Foreign Currency Balance [Line Items]
Postretirement expense	$ (387.1)	$ (43.2)	$ (548.6)
Foreign exchange losses	(0.2)	(6.8)	(2.5)
Environmental costs and other, net	(6.6)	(32.4)	(29.2)
Total other (expense), net	(393.9)	(82.4)	(580.3)
Foreign currency (gains) losses	1	47.4	22.8
Foreign currency (gains) losses related to exiting foreign countries
Intercompany Foreign Currency Balance [Line Items]
Foreign currency (gains) losses	(3.7)	$ 2.9	4
Pension Plans
Intercompany Foreign Currency Balance [Line Items]
Settlement losses	$ 348.9		$ 499.4

Income taxes - Total Income (Lo

Income taxes - Total Income (Loss) From Continuing Operations Before Income Taxes and Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income (loss) before income taxes
United States	$ (545.5)	$ (177.2)	$ (443.5)
Foreign	197.7	114.6	(18.2)
Loss before income taxes	(347.8)	(62.6)	(461.7)
Current
United States	8.8	15.9	9.1
Foreign	46	34.7	38.1
Total	54.8	50.6	47.2
Deferred
Foreign	24.5	(8.3)	(59.1)
Total provision (benefit) for income taxes	$ 79.3	$ 42.3	$ (11.9)

Income taxes - Reconciliation o

Income taxes - Reconciliation of the Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
United States statutory income tax benefit	$ (73)	$ (13.2)	$ (96.9)
Income and losses for which no provision or benefit has been recognized	123.2	40.9	91.1
Foreign rate differential and other foreign tax expense	12.7	6.4	0.4
Income tax withholdings	14	19.7	13.5
Permanent items	(3)	(2.1)	(1.8)
Change in uncertain tax positions	3.8	0.4	(0.3)
Change in valuation allowances	2.1	(9.8)	(0.8)
U.S. income tax benefit	(0.6)	0	0
Other	0.1	0	0
Enacted rate changes	0	0	(17.1)
Total provision (benefit) for income taxes	$ 79.3	$ 42.3	$ (11.9)

Income taxes - Significant Port

Income taxes - Significant Portions of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets
Tax loss carryforwards	$ 813	$ 825.5
Postretirement benefits	183	149.6
Foreign tax credit carryforwards	83.6	109.2
Other tax credit carryforwards	29.1	32.7
Deferred revenue	31.9	28.2
Employee benefits and compensation	31.5	21.2
Purchased capitalized software	19.4	16.9
Depreciation	33	32.6
Warranty, bad debts and other reserves	7.6	7.1
Capitalized costs	9	6.2
Other	57.6	49.9
Total deferred tax assets, gross	1,298.7	1,279.1
Valuation allowance	(1,150.1)	(1,110.5)	$ (1,226.2)	$ (1,271.5)
Total deferred tax assets	148.6	168.6
Deferred tax liabilities
Capitalized research and development	10.4	31
Other	25.1	29.2
Total deferred tax liabilities	35.5	60.2
Net deferred tax assets	$ 113.1	$ 108.4

Income taxes - Valuation Allowa

Income taxes - Valuation Allowance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Movement In Deferred Tax Assets, Valuation Allowance [Roll Forward]
Valuation allowance, at beginning of year	$ (1,110.5)	$ (1,226.2)	$ (1,271.5)
Increase (decrease) in valuation allowance	(2.1)
Valuation allowance, at end of year	(1,150.1)	(1,110.5)	(1,226.2)
Change in valuation allowances	2.1	(9.8)	(0.8)
Actuarial pension adjustments
Movement In Deferred Tax Assets, Valuation Allowance [Roll Forward]
Increase (decrease) in valuation allowance	84.5	70.7	99.5
Expired net operating losses/tax credits
Movement In Deferred Tax Assets, Valuation Allowance [Roll Forward]
Increase (decrease) in valuation allowance	42.9	52.3	50
Foreign exchange
Movement In Deferred Tax Assets, Valuation Allowance [Roll Forward]
Increase (decrease) in valuation allowance	(6.8)	14.8	18.4
Recognition of net income tax benefit
Movement In Deferred Tax Assets, Valuation Allowance [Roll Forward]
Increase (decrease) in valuation allowance	(125.9)	(43.9)	(102.1)
Other
Movement In Deferred Tax Assets, Valuation Allowance [Roll Forward]
Increase (decrease) in valuation allowance	(34.3)	21.8	(20.5)
US Pension Activity
Movement In Deferred Tax Assets, Valuation Allowance [Roll Forward]
Change in valuation allowances	$ (95.9)	$ (11.3)	$ (84.9)

Income taxes - Tax Loss Carryfo

Income taxes - Tax Loss Carryforwards (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
U.S. Federal	$ 366
State and local	180.2
Foreign	266.8
Total tax loss carryforwards	813	$ 825.5
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, not set to expire	271.1
Total tax loss carryforwards	813	$ 825.5
2024
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, set to expire	13.4
2025
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, set to expire	20.8
2026
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, set to expire	15.6
2027
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, set to expire	40.8
2028
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, set to expire	93.1
Thereafter
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, set to expire	$ 358.2

Income taxes - Tax Credit Carry

Income taxes - Tax Credit Carryforwards (Details) $ in Millions	Dec. 31, 2023 USD ($)
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, set to expire	$ 112.7
2024
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, set to expire	22.5
2025
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, set to expire	20.7
2026
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, set to expire	33.7
2027
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, set to expire	9.1
2028
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, set to expire	0.3
Thereafter
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, set to expire	$ 26.4

Income taxes - Narrative (Detai

Income taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Tax Credit Carryforward [Line Items]
Additional valuation allowance amount	$ 2,100,000
Effective income tax rate reconciliation, change in deferred tax assets valuation allowance, amount	2,100,000	$ (9,800,000)	$ (800,000)
Provision for income taxes that may become payable upon distribution of earnings of certain foreign subsidiaries	0
Unrecognized deferred income tax liability	32,200,000
Penalties and interest accrued related to income tax liabilities	4,600,000	$ 3,800,000
Reasonably possible decrease in amount of unrecognized tax benefits	1,300,000
Utilization of tax attributes, annual limitation	70,600,000
Utilization of tax attributes, cumulative limitation	488,000,000
Foreign Tax Authority
Tax Credit Carryforward [Line Items]
Effective income tax rate reconciliation, change in deferred tax assets valuation allowance, amount	$ (9,800,000)

Income taxes - Cash Paid for In

Income taxes - Cash Paid for Income Taxes, Net of Refunds (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Cash paid for income taxes, net of refunds	$ 63.4	$ 49	$ 53.7

Income taxes - Reconciliation_2

Income taxes - Reconciliation of Changes in Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1	$ 17.8	$ 21.6	$ 30.9
Additions based on tax positions related to the current year	4.6	1.9	3.5
Changes for tax positions of prior years	2.6	1.2	(8.8)
Reductions as a result of a lapse of applicable statute of limitations	(4.6)	(5.4)	(2.6)
Settlements	0	0	(0.3)
Changes due to foreign currency	0.5
Changes due to foreign currency		(1.5)	(1.1)
Balance at December 31	$ 20.9	$ 17.8	$ 21.6

Earnings (loss) per common sh_3

Earnings (loss) per common share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Basic loss per common share computation:
Net loss attributable to Unisys Corporation	$ (430.7)	$ (106)	$ (448.5)
Weighted average shares (in shares)	68,254	67,665	66,451
Basic loss per common share (in dollars per share)	$ (6.31)	$ (1.57)	$ (6.75)
Diluted loss per common share computation:
Net loss attributable to Unisys Corporation	$ (430.7)	$ (106)	$ (448.5)
Weighted average shares (in shares)	68,254	67,665	66,451
Plus incremental shares from assumed conversions of employee stock plans (in shares)	0	0	0
Adjusted weighted average shares (in shares)	68,254	67,665	66,451
Diluted loss per common share (in dollars per share)	$ (6.31)	$ (1.57)	$ (6.75)
2021 Notes | Senior Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stated interest rate (as a percentage)	5.50%
Restricted Stock Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive weighted-average securities (in shares)	945	481	871
Common shares issuable upon conversion of the 5.50% convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive weighted-average securities (in shares)	0	0	557

Accounts receivable (Details)

Accounts receivable (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Receivables [Abstract]
Revenue recognized in excess of billings on services contracts or unbilled accounts receivable	$ 93.9	$ 87.9
Unearned income	9	13.9
Allowance for doubtful accounts	9.5	9.1
Provision for doubtful accounts reported in selling, general and administrative expenses, (income) expense	(0.2)	0.3	$ (0.6)
Long-term receivables	$ 70.3	$ 85.3

Contract assets and deferred _3

Contract assets and deferred revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Contract assets - current	$ 11.7	$ 28.9
Contract assets - long-term	8.6	11
Deferred revenue - current	(198.6)	(200.7)
Deferred revenue - long-term	(104.4)	(122.3)
Revenue recognized that was included in deferred revenue at the beginning of the period	$ 198.9	$ 235.4

Capitalized contract costs - Su

Capitalized contract costs - Summary (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Capitalized Contract Cost [Line Items]
Costs to fulfill a contract - amortization expense	$ 6.7	$ 23.7	$ 27.9
Costs to fulfill a contract	19.2	34.8
Deferred Commissions
Capitalized Contract Cost [Line Items]
Deferred commissions	3.7	4.9
Costs to fulfill a contract - amortization expense	$ 1.5	$ 2.9	$ 2.9

Financial instruments and con_3

Financial instruments and concentration of credit risks - Narrative (Details) - Foreign Exchange Forward Contract - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Fair Value Measurements Disclosure [Line Items]
Maturity period limit of foreign currency exchange instruments (in months)	3 months
Notional amount of foreign exchange forward contracts not designated as hedging instruments	$ 488.4	$ 533.5

Financial instruments and con_4

Financial instruments and concentration of credit risks - Fair Value of Foreign Exchange Forward Contracts by Balance Sheet Location (Details) - Foreign Exchange Forward Contract - Level 2 - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Prepaid expenses and other current assets	$ 9	$ 7.9
Other accrued liabilities	0.1	1.3
Total fair value	$ 8.9	$ 6.6

Financial instruments and con_5

Financial instruments and concentration of credit risks - Gains and Losses Recognized on Foreign Exchange Forward Contracts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other (expense), net | Foreign Exchange Forward Contract
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Amount of gain (loss) recognized	$ 13.5	$ (39.3)	$ (18.8)

Properties - Schedule of Compon

Properties - Schedule of Components of Properties (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Total properties	$ 396.4	$ 410.8
Buildings
Property, Plant and Equipment [Line Items]
Total properties	0.3	0.3
Machinery and office equipment
Property, Plant and Equipment [Line Items]
Total properties	211.5	232.6
Internal-use software
Property, Plant and Equipment [Line Items]
Total properties	177.1	170.9
Rental equipment
Property, Plant and Equipment [Line Items]
Total properties	$ 7.5	$ 7

Properties (Details)

Properties (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Other charges related to the cost-reduction effort	$ 1	$ 47.4	$ 22.8
Asset write-offs
Property, Plant and Equipment [Line Items]
Other charges related to the cost-reduction effort		$ 13.6

Goodwill and intangible asset_2

Goodwill and intangible assets - Carrying Value of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Beginning balance	$ 287.1	$ 315
Acquisition - Measurement period adjustments		(27.5)
Translation adjustments	0.3	(0.4)
Ending balance	287.4	287.1
Decrease in goodwill		27.5
DWS
Goodwill [Roll Forward]
Beginning balance	140.5	140.9
Acquisition - Measurement period adjustments		0
Translation adjustments	0.3	(0.4)
Ending balance	140.8	140.5
Decrease in goodwill		0
CA&I Segment
Goodwill [Roll Forward]
Beginning balance	38	65.5
Acquisition - Measurement period adjustments		(27.5)
Translation adjustments	0	0
Ending balance	38	38
Decrease in goodwill		27.5
ECS
Goodwill [Roll Forward]
Beginning balance	98.3	98.3
Acquisition - Measurement period adjustments		0
Translation adjustments	0	0
Ending balance	98.3	98.3
Decrease in goodwill		0
Other
Goodwill [Roll Forward]
Beginning balance	10.3	10.3
Acquisition - Measurement period adjustments		0
Translation adjustments	0	0
Ending balance	$ 10.3	10.3
Decrease in goodwill		$ 0

Goodwill and intangible asset_3

Goodwill and intangible assets - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	$ 287.4	$ 287.1	$ 315
Amortization expense	9.7	10.1	3
Other
Goodwill [Line Items]
Goodwill	$ 10.3	$ 10.3	$ 10.3

Goodwill and intangible asset_4

Goodwill and intangible assets - Intangible Assets, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Gross Carrying Amount	$ 65.5	$ 65.5
Accumulated Amortization	22.8	13.1
Total	42.7	52.4
Technology
Goodwill [Line Items]
Gross Carrying Amount	10	10
Accumulated Amortization	8.1	4.9
Total	1.9	5.1
Customer relationships
Goodwill [Line Items]
Gross Carrying Amount	54.2	54.2
Accumulated Amortization	14.1	7.9
Total	40.1	46.3
Customer relationships | CompuGain
Goodwill [Line Items]
Measurement period adjustments, increase in fair value of intangibles	27.6
Marketing
Goodwill [Line Items]
Gross Carrying Amount	1.3	1.3
Accumulated Amortization	0.6	0.3
Total	$ 0.7	$ 1

Goodwill and intangible asset_5

Goodwill and intangible assets - Schedule of Future Amortization of Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
2024	$ 7.2
2025	4.3
2026	4
2027	4
2028	4
Thereafter	19.2
Total	$ 42.7	$ 52.4

Debt - Components of Long-term

Debt - Components of Long-term Debt (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Finance leases	$ 300,000	$ 1,100,000
Other debt	23,500,000	32,800,000
Total	504,200,000	513,100,000
Less – current maturities	13,000,000	17,400,000
Total long-term debt	$ 491,200,000	495,700,000
Senior Notes | Senior Secured Notes Due 2027
Debt Instrument [Line Items]
Stated interest rate (as a percentage)	6.875%
Face amount	$ 485,000,000	485,000,000
Unamortized discount and fees	4,600,000	5,800,000
Long-term debt, gross	$ 480,400,000	$ 479,200,000

Debt - Estimated Fair Values of

Debt - Estimated Fair Values of Long-term Debt (Details) - Senior Notes - 6.875% senior secured notes due November 1, 2027 - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Stated interest rate (as a percentage)	6.875%
Estimated Fair Value
Debt Instrument [Line Items]
Long-term debt	$ 437.5	$ 373

Debt - Maturities of Long-term

Debt - Maturities of Long-term Debt, Including Finance Leases (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Total
2024	$ 13
2025	6.6
2026	3.3
2027	481.3
Total	504.2	$ 513.1
Long-Term Debt
2024	12.7
2025	6.6
2026	3.3
2027	481.3
Long-term debt	503.9
Finance Leases
2024	0.3
2025	0
2026	0
2027	0
Total finance lease liabilities	$ 0.3	$ 1.1

Debt - Cash Paid for Interest a

Debt - Cash Paid for Interest and Capitalized Interest (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Disclosure [Abstract]
Cash paid for interest	$ 35.5	$ 36.5	$ 40.1
Capitalized interest expense	$ 5.7	$ 5.1	$ 4.5

Debt - Narrative (Details)

Debt - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2023	Dec. 31, 2022
2027 Notes | Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 485,000,000	$ 485,000,000
Stated interest rate (as a percentage)		6.875%
2027 Notes | Senior Notes | Change of Control
Debt Instrument [Line Items]
Redemption price, proportion of principal amount (as a percent)		101%
2021 Notes | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percentage)		5.50%
Aggregate principal amount of debt converted	$ 84,200,000
Aggregate cash payments to note holders for debt conversion	86,500,000
Aggregate cash payment for outstanding principal	84,200,000
Aggregate cash payment for accrued interest	$ 2,300,000
Aggregate shares of common stock issued from conversion of convertible securities (in shares)	4,537,123
Amended and Restated ABL Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 145,000,000
Accordion feature increase limit		175,000,000
Borrowings outstanding		0
Availability under the facility, net of letters of credit issued		$ 88,600,000
Springing maturity, period prior to any date on which domestic pension contributions in an amount in excess of threshold are required to be paid		91 days
Springing maturity, date on which pension contributions to pension funds in the United States are required to be paid, threshold excess amount		$ 100,000,000
Springing maturity, conditions, minimum liquidity		130,000,000
Amended and Restated ABL Credit Facility | Letters of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		40,000,000
Letters of credit outstanding		$ 7,100,000
Amended and Restated ABL Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Requirement to maintain minimum fixed charge coverage ratio (as a percent)		10%
Requirement to maintain fixed charge coverage ratio, availability threshold		$ 14,500,000
Amount of aggregate default under other debt that would trigger event of default		$ 50,000,000

Debt - Interest Expense (Detail

Debt - Interest Expense (Details) - Senior Notes - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
2027 Notes
Debt Instrument [Line Items]
Contractual interest coupon	$ 33.3	$ 33.3	$ 33.3
Amortization of debt issuance costs	1.2	1.2	1.2
Total	$ 34.5	$ 34.5	34.5
2021 Notes
Debt Instrument [Line Items]
Contractual interest coupon			0.8
Amortization of debt discount			0.5
Amortization of debt issuance costs			0.1
Total			$ 1.4

Other accrued liabilities - Sum

Other accrued liabilities - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Other Liabilities Disclosure [Abstract]
Payrolls and commissions	$ 124.5	$ 84.8
Income taxes	31.4	41.3
Taxes other than income taxes	27.4	23.2
Accrued vacations	22.4	21.1
Operating leases	19.1	26
Postretirement	10.2	11.7
Cost reduction	9.4	11.7
Accrued interest	5.8	5.9
Other	58.2	45.9
Total other accrued liabilities	$ 308.4	$ 271.6

Employee plans - Narrative (Det

Employee plans - Narrative (Details) $ in Millions			1 Months Ended			3 Months Ended	12 Months Ended
	Oct. 14, 2021 USD ($) retiree	May 01, 2021 USD ($)	Nov. 30, 2023 USD ($) retiree	Mar. 31, 2023 USD ($) retiree	Jan. 31, 2021 USD ($) retiree	Jun. 30, 2021 USD ($)	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of unissued common stock available for grant under the plans (in shares) | shares							5,300,000
Matching contribution by the company as percentage of participants' contribution							50%
Percentage of eligible pay contributed by participants that will be matched							6%
Cost recognized for contribution plans							$ 6.6	$ 6.9	$ 7.5
Deferred compensation liability							7.1	7.9
International Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost recognized for contribution plans							16.9	16.6	16.4
Pension Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash pension settlement charge							348.9		499.4
Estimated cash contributions by the company in next fiscal year							21
Pension Plans | U.S. Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Group annuity contract to transfer projected benefit obligations, purchase amount	$ 235		$ 253	$ 263	$ 279
Group annuity contract to transfer projected benefit obligations, number of retirees | retiree	6,900		3,900	8,650	11,600
Non-cash pension settlement charge	$ 130.1		$ 167.2	$ 181	$ 158		348.2	0	288.1
Pension Plans | International Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash pension settlement charge							0.7	0	211.3
Pension Plans | Dutch Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash pension settlement charge		$ 182.5
Projected benefit obligation transferred to multiemployer plan and removed from balance sheet		$ 553
Pension Plans | Swiss Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash pension settlement charge						$ 28.8
Projected benefit obligation transferred to multiemployer plan and removed from balance sheet						100
Multiemployer plan, pension, significant, plan contribution						$ 10
Other Postretirement Benefit Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated cash contributions by the company in next fiscal year							$ 4
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Certain investments valued using net asset value as practical expedient, redemption notice period							120 days
Restricted Stock and RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense							$ 17.2	20	18.8
Aggregate weighted-average grant-date fair value of units granted							17.1	27	37.5
Total unrecognized compensation cost							$ 18.2
Unrecognized compensation cost, weighted-average recognition period							1 year 8 months 12 days
Aggregate weighted-average grant-date fair value of units vested							$ 9.1	$ 17.4	$ 15.3
Performance-Based Unit | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares which will vest after achievement of goals (in shares) | shares							0
Performance-Based Unit | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares which will vest after achievement of goals (in shares) | shares							2

Employee plans - Summary of Res

Employee plans - Summary of Restricted Stock Unit Activity (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Weighted-Average Grant-Date Fair Value
Granted (in dollars per share)	$ 7.32	$ 34.14
Restricted Stock and RSU
Restricted Stock and RSU
Outstanding at beginning of period (in shares)	2,230
Granted (in shares)	3,881
Vested (in shares)	(686)
Forfeited and expired (in shares)	(667)
Outstanding at end of period (in shares)	4,758	2,230
Weighted-Average Grant-Date Fair Value
Outstanding at beginning of period (in dollars per share)	$ 23.53
Granted (in dollars per share)	4.14
Vested (in dollars per share)	13.26
Forfeited and expired (in dollars per share)	11.40
Outstanding at end of period (in dollars per share)	$ 9.27	$ 23.53

Employee plans - Weighted Avera

Employee plans - Weighted Average Assumptions for Restricted Stock Units (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Retirement Benefits [Abstract]
Weighted-average fair value of grant (in dollars per share)	$ 7.32	$ 34.14
Risk-free interest rate (as a percentage)	4.51%	1.72%
Expected volatility (as a percentage)	63.63%	57.71%
Expected life of restricted stock units in years	2 years 10 months 2 days	2 years 10 months 6 days
Expected dividend yield (as a percentage)	0%	0%

Employee plans - Funded Status

Employee plans - Funded Status of the Plan and Amounts Recognized in Consolidated Balance Sheet (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Amounts recognized in the consolidated balance sheets consist of:
Prepaid postretirement assets	$ 38	$ 119.5
Other accrued liabilities	(10.2)	(11.7)
Long-term postretirement liabilities	(787.7)	(714.6)
Pension Plans | U.S. Plans
Change in projected/accumulated benefit obligation
Benefit obligation at beginning of year	2,852.9	3,709.6
Service cost	0	0	$ 0
Interest cost	152.7	114.6	117.6
Plan participants’ contributions	0	0
Plan settlement	(516.1)	0
Actuarial (gain) loss	80.2	(668.1)
Benefits paid	(278)	(303.2)
Foreign currency translation adjustments	0	0
Benefit obligation at end of year	2,291.7	2,852.9	3,709.6
Change in plan assets
Fair value of plan assets at beginning of year	2,440.1	3,139.3
Actual return on plan assets	166.1	(401.9)
Employer contribution	5.8	5.9
Plan participants’ contributions	0	0
Plan settlement	(516.1)	0
Benefits paid	(278)	(303.2)
Foreign currency translation adjustments	0	0
Fair value of plan assets at end of year	1,817.9	2,440.1	3,139.3
Total funded status	(473.8)	(412.8)
Amounts recognized in the consolidated balance sheets consist of:
Prepaid postretirement assets	30.7	44.4
Other accrued liabilities	(5.4)	(5.4)
Long-term postretirement liabilities	(499.1)	(451.8)
Total funded status	(473.8)	(412.8)
Accumulated other comprehensive loss, net of tax
Net (income) loss	1,514.2	1,845.3
Prior service cost (credit)	(24.7)	(27.2)
Accumulated benefit obligation	2,291.7	2,852.9
Pension Plans | International Plans
Change in projected/accumulated benefit obligation
Benefit obligation at beginning of year	1,574.6	2,614.4
Service cost	1.1	1.9	3
Interest cost	72.3	39.3	36.7
Plan participants’ contributions	1.2	1.1
Plan settlement	(4.5)	0
Actuarial (gain) loss	67.7	(726.4)
Benefits paid	(80.9)	(86.4)
Foreign currency translation adjustments	83.9	(269.3)
Benefit obligation at end of year	1,715.4	1,574.6	2,614.4
Change in plan assets
Fair value of plan assets at beginning of year	1,444.3	2,431.6
Actual return on plan assets	18.7	(685.7)
Employer contribution	36.6	33.4
Plan participants’ contributions	1.2	1.1
Plan settlement	(4.5)	0
Benefits paid	(80.9)	(86.4)
Foreign currency translation adjustments	70.8	(249.7)
Fair value of plan assets at end of year	1,486.2	1,444.3	2,431.6
Total funded status	(229.2)	(130.3)
Amounts recognized in the consolidated balance sheets consist of:
Prepaid postretirement assets	7.3	75.1
Other accrued liabilities	(0.2)	(0.2)
Long-term postretirement liabilities	(236.3)	(205.2)
Total funded status	(229.2)	(130.3)
Accumulated other comprehensive loss, net of tax
Net (income) loss	1,037.8	859.7
Prior service cost (credit)	(45)	(44.9)
Accumulated benefit obligation	1,712.5	1,573
Other Postretirement Benefit Plans
Change in projected/accumulated benefit obligation
Benefit obligation at beginning of year	68.9	81.1
Service cost	0.2	0.2	0.4
Interest cost	2.6	1.9	1.8
Plan participants’ contributions	0.3	0.9
Actuarial (gain) loss	(6.9)	(16.1)
Benefits paid	(5.1)	(4.9)
Foreign currency translation adjustments	0.1	5.8
Benefit obligation at end of year	60.1	68.9	81.1
Change in plan assets
Fair value of plan assets at beginning of year	5.2	5.6
Actual return on plan assets	(2.8)	(0.7)
Employer contribution	5.6	4.3
Plan participants’ contributions	0.3	0.9
Benefits paid	(5.1)	(4.9)
Fair value of plan assets at end of year	3.2	5.2	$ 5.6
Total funded status	(56.9)	(63.7)
Amounts recognized in the consolidated balance sheets consist of:
Other accrued liabilities	(4.6)	(6.1)
Long-term postretirement liabilities	(52.3)	(57.6)
Total funded status	(56.9)	(63.7)
Accumulated other comprehensive loss, net of tax
Net (income) loss	(7.6)	(7.8)
Prior service cost (credit)	$ 0.6	$ (0.7)

Employee plans - Schedule of Ac

Employee plans - Schedule of Accumulated and Projected Benefit Obligation in Excess of Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Retirement Benefits [Abstract]
Accumulated benefit obligation	$ 3,544.3	$ 3,621.6
Fair value of plan assets	2,806.2	2,960.6
Projected benefit obligation	3,547.2	3,623.2
Fair value of plan assets	$ 2,806.2	$ 2,960.6

Employee plans - Components of

Employee plans - Components of Net Periodic Benefit Expense (Details) - USD ($) $ in Millions		1 Months Ended			12 Months Ended
	Oct. 14, 2021	Nov. 30, 2023	Mar. 31, 2023	Jan. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]					Other (expense), net
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Settlement losses					$ 348.9		$ 499.4
Pension Plans | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost					0	$ 0	0
Interest cost					152.7	114.6	117.6
Expected return on plan assets					(178.6)	(189.8)	(199.8)
Amortization of prior service credit					(2.5)	(2.5)	(2.5)
Recognized net actuarial loss					75.6	125.9	135.6
Settlement losses	$ 130.1	$ 167.2	$ 181	$ 158	348.2	0	288.1
Net periodic pension expense (income)					395.4	48.2	339
Pension Plans | International Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost					1.1	1.9	3
Interest cost					72.3	39.3	36.7
Expected return on plan assets					(84.9)	(77.4)	(81.6)
Amortization of prior service credit					(2.4)	(2.6)	(2.8)
Recognized net actuarial loss					9.1	37.7	48.3
Settlement losses					0.7	0	211.3
Net periodic pension expense (income)					(4.1)	(1.1)	214.9
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost					0.2	0.2	0.4
Interest cost					2.6	1.9	1.8
Expected return on plan assets					(0.3)	(0.3)	(0.3)
Amortization of prior service credit					(1.3)	(1.4)	(1.7)
Recognized net actuarial loss					(4)	(2.2)	(2.1)
Net periodic pension expense (income)					$ (2.8)	$ (1.8)	$ (1.9)

Employee plans - Schedule of We

Employee plans - Schedule of Weighted-Average Assumptions (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Plans | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate (as a percentage)	6.04%	3.18%	2.85%
Expected long-term rate of return on assets (as a percentage)	7.10%	6.50%	6.07%
Weighted-average assumptions used to determine benefit obligations at December 31 were as follows:
Discount rate (as a percentage)	5.70%	6.04%	3.18%
Pension Plans | International Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate (as a percentage)	4.80%	1.73%	1.23%
Expected long-term rate of return on assets (as a percentage)	4.44%	3.88%	3.30%
Weighted-average assumptions used to determine benefit obligations at December 31 were as follows:
Discount rate (as a percentage)	4.24%	4.80%	1.73%
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate (as a percentage)	5.39%	2.70%	2.21%
Expected long-term rate of return on assets (as a percentage)	5.50%	5.50%	5.50%
Weighted-average assumptions used to determine benefit obligations at December 31 were as follows:
Discount rate (as a percentage)	5.03%	5.39%	2.70%

Employee plans - Company's Inve

Employee plans - Company's Investment Policy Targets and Ranges for Each Asset Category (Details) - Pension Plans	Dec. 31, 2023
U.S. Plans | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	40%
U.S. Plans | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	44%
U.S. Plans | Real estate
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	0%
U.S. Plans | Cash
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	0%
U.S. Plans | Other
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	16%
U.S. Plans | Minimum | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	35%
U.S. Plans | Minimum | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	39%
U.S. Plans | Minimum | Cash
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	0%
U.S. Plans | Minimum | Other
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	11%
U.S. Plans | Maximum | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	45%
U.S. Plans | Maximum | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	49%
U.S. Plans | Maximum | Cash
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	5%
U.S. Plans | Maximum | Other
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	21%
International Plans | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	1%
International Plans | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	57%
International Plans | Real estate
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	1%
International Plans | Cash
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	0%
International Plans | Other
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	41%
International Plans | Minimum | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	0%
International Plans | Minimum | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	52%
International Plans | Minimum | Real estate
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	0%
International Plans | Minimum | Cash
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	0%
International Plans | Minimum | Other
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	34%
International Plans | Maximum | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	1%
International Plans | Maximum | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	62%
International Plans | Maximum | Real estate
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	1%
International Plans | Maximum | Cash
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	0%
International Plans | Maximum | Other
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan target allocation as proportion of assets (as a percent)	49%

Employee plans - Expected Futur

Employee plans - Expected Future Benefit Payments (Details) $ in Millions	Dec. 31, 2023 USD ($)
Pension Plans | U.S. Plans
Expected Payments
2024	$ 240.7
2025	234.8
2026	228.5
2027	221.7
2028	213.8
2029 - 2033	932
Pension Plans | International Plans
Expected Payments
2024	93.8
2025	94.9
2026	98.2
2027	100.6
2028	102.1
2029 - 2033	531.1
Other Postretirement Benefit Plans
Expected Payments
2024	5.2
2025	4.6
2026	4.4
2027	4.1
2028	3.9
2029 - 2033	$ 16.8

Employee plans - Assumed Health

Employee plans - Assumed Health Care Cost Trend Rates (Details)	Dec. 31, 2023	Dec. 31, 2022
Retirement Benefits [Abstract]
Health care cost trend rate assumed for next year (as a percentage)	7%	7%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) (as a percentage)	4.50%	4.50%

Employee plans - Schedule of Pl

Employee plans - Schedule of Plan Assets at Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Plans | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	$ 1,817.9	$ 2,440.1	$ 3,139.3
Pension Plans | U.S. Plans | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	1,382.2	1,945.9
Pension Plans | U.S. Plans | Fair Value | Common Stocks
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	361.5	544.6
Pension Plans | U.S. Plans | Fair Value | Equity Securities, Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	227.9	383.2
Pension Plans | U.S. Plans | Fair Value | U.S. Govt. Securities
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	289.8	291.7
Pension Plans | U.S. Plans | Fair Value | Other Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	245.1	293.8
Pension Plans | U.S. Plans | Fair Value | Debt Securities, Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	127.4	185.5
Pension Plans | U.S. Plans | Fair Value | Real Estate Investment Trusts
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	34.6	87.1
Pension Plans | U.S. Plans | Fair Value | Derivatives
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	89.9	95
Pension Plans | U.S. Plans | Fair Value | Pooled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	80	92.1
Pension Plans | U.S. Plans | Fair Value | Cumulative futures contracts variation margin paid to (received from) brokers
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	(67.4)	5.3
Pension Plans | U.S. Plans | Fair Value | Cash
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	1.6	0.8
Pension Plans | U.S. Plans | Fair Value | Receivables
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	10.8	9.3
Pension Plans | U.S. Plans | Fair Value | Payables
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	(19)	(42.5)
Pension Plans | U.S. Plans | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	679.1	890.2
Pension Plans | U.S. Plans | Level 1 | Common Stocks
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	360.6	543.2
Pension Plans | U.S. Plans | Level 1 | U.S. Govt. Securities
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	289.8	291.7
Pension Plans | U.S. Plans | Level 1 | Real Estate Investment Trusts
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	34.6	87.1
Pension Plans | U.S. Plans | Level 1 | Derivatives
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	68.1	(4.7)
Pension Plans | U.S. Plans | Level 1 | Cumulative futures contracts variation margin paid to (received from) brokers
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	(67.4)	5.3
Pension Plans | U.S. Plans | Level 1 | Cash
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	1.6	0.8
Pension Plans | U.S. Plans | Level 1 | Receivables
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	10.8	9.3
Pension Plans | U.S. Plans | Level 1 | Payables
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	(19)	(42.5)
Pension Plans | U.S. Plans | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	703.1	1,055.7
Pension Plans | U.S. Plans | Level 2 | Common Stocks
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0.9	1.4
Pension Plans | U.S. Plans | Level 2 | Equity Securities, Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	227.9	383.2
Pension Plans | U.S. Plans | Level 2 | Other Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	245.1	293.8
Pension Plans | U.S. Plans | Level 2 | Debt Securities, Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	127.4	185.5
Pension Plans | U.S. Plans | Level 2 | Derivatives
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	21.8	99.7
Pension Plans | U.S. Plans | Level 2 | Pooled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	80	92.1
Pension Plans | U.S. Plans | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Pension Plans | U.S. Plans | Level 3 | Common Stocks
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Pension Plans | U.S. Plans | Plan assets measured using NAV as a practical expedient
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	435.7	494.2
Pension Plans | U.S. Plans | Plan assets measured using NAV as a practical expedient | Debt Securities, Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	102.3	65
Pension Plans | U.S. Plans | Plan assets measured using NAV as a practical expedient | Other, Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	96.8	147.4
Pension Plans | U.S. Plans | Plan assets measured using NAV as a practical expedient | Private Real Estate
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	188.9	238.9
Pension Plans | U.S. Plans | Plan assets measured using NAV as a practical expedient | Private Equity
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	47.7	42.9
Pension Plans | International Plans
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	1,486.2	1,444.3	2,431.6
Pension Plans | International Plans | Fair Value
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	946.7	411.1
Pension Plans | International Plans | Fair Value | Common Stocks
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Pension Plans | International Plans | Fair Value | Other Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	360.3	2.8
Pension Plans | International Plans | Fair Value | Insurance Contracts
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	510.6	100.3
Pension Plans | International Plans | Fair Value | Debt Securities, Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	16.1	126.5
Pension Plans | International Plans | Fair Value | Derivatives
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	(3.4)
Pension Plans | International Plans | Fair Value | Other, Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	13.2	15
Pension Plans | International Plans | Fair Value | Pooled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	12	25.3
Pension Plans | International Plans | Fair Value | Cash
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	37.9	20.5
Pension Plans | International Plans | Fair Value | Receivables
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	120.9
Pension Plans | International Plans | Fair Value | Payables
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	(0.2)
Pension Plans | International Plans | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	37.9	141.2
Pension Plans | International Plans | Level 1 | Common Stocks
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Pension Plans | International Plans | Level 1 | Cash
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	37.9	20.5
Pension Plans | International Plans | Level 1 | Receivables
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	120.9
Pension Plans | International Plans | Level 1 | Payables
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	(0.2)
Pension Plans | International Plans | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	398.2	169.6
Pension Plans | International Plans | Level 2 | Common Stocks
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Pension Plans | International Plans | Level 2 | Other Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	360.3	2.8
Pension Plans | International Plans | Level 2 | Debt Securities, Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	16.1	126.5
Pension Plans | International Plans | Level 2 | Derivatives
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	(3.4)
Pension Plans | International Plans | Level 2 | Other, Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	13.2	15
Pension Plans | International Plans | Level 2 | Pooled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	12	25.3
Pension Plans | International Plans | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	510.6	100.3
Pension Plans | International Plans | Level 3 | Common Stocks
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0	0
Pension Plans | International Plans | Level 3 | Insurance Contracts
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	510.6	100.3	110.2
Pension Plans | International Plans | Plan assets measured using NAV as a practical expedient
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	539.5	1,033.2
Pension Plans | International Plans | Plan assets measured using NAV as a practical expedient | Debt Securities, Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	191.4	788.8
Pension Plans | International Plans | Plan assets measured using NAV as a practical expedient | Other, Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	348.1	244.4
Pension Plans | International Plans | Plan assets measured using NAV as a practical expedient | Private Real Estate
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets
Pension Plans | International Plans | Plan assets measured using NAV as a practical expedient | Private Equity
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets
Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	3.2	5.2	5.6
Other Postretirement Plans | U.S. Plans | Insurance Contracts
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	3.2	5.2
Other Postretirement Plans | U.S. Plans | Level 3 | Insurance Contracts
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	$ 3.2	$ 5.2	$ 5.6

Employee plans - Summary of Cha

Employee plans - Summary of Changes in Level 3 Fair Value of Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Other Postretirement Plans
Change in plan assets
Fair value of plan assets at beginning of year	$ 5.2	$ 5.6
Fair value of plan assets at end of year	3.2	5.2
U.S. Plans | Other Postretirement Plans | Insurance Contracts
Change in plan assets
Fair value of plan assets at beginning of year	5.2
Fair value of plan assets at end of year	3.2	5.2
U.S. Plans | Other Postretirement Plans | Level 3 | Insurance Contracts
Change in plan assets
Fair value of plan assets at beginning of year	5.2	5.6
Realized gains (losses)	(2.8)	(0.7)
Purchases or acquisitions	0.8	0.3
Sales or dispositions	0	0
Currency and unrealized gains (losses) relating to instruments still held	0	0
Fair value of plan assets at end of year	3.2	5.2
U.S. Plans | Pension Plans
Change in plan assets
Fair value of plan assets at beginning of year	2,440.1	3,139.3
Fair value of plan assets at end of year	1,817.9	2,440.1
U.S. Plans | Pension Plans | Level 3
Change in plan assets
Fair value of plan assets at beginning of year	0
Fair value of plan assets at end of year	0	0
International Plans | Pension Plans
Change in plan assets
Fair value of plan assets at beginning of year	1,444.3	2,431.6
Fair value of plan assets at end of year	1,486.2	1,444.3
International Plans | Pension Plans | Level 3
Change in plan assets
Fair value of plan assets at beginning of year	100.3
Fair value of plan assets at end of year	510.6	100.3
International Plans | Pension Plans | Level 3 | Insurance Contracts
Change in plan assets
Fair value of plan assets at beginning of year	100.3	110.2
Realized gains (losses)	0	0
Purchases or acquisitions	375.6	5.2
Sales or dispositions	(13.8)	(10)
Currency and unrealized gains (losses) relating to instruments still held	48.5	(5.1)
Fair value of plan assets at end of year	$ 510.6	$ 100.3

Employee plans - Additional Inf

Employee plans - Additional Information About Plan Assets Valued Using Net Asset Value (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) fund	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Pension Plans | U.S. Plans
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 1,817.9	$ 2,440.1	$ 3,139.3
Unfunded Commitments	23.3	28.4
Pension Plans | U.S. Plans | Debt Securities, Commingled Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	0	$ 0
Redemption Notice Period Range		45 days
Pension Plans | U.S. Plans | Other, Commingled Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	0	$ 0
Pension Plans | U.S. Plans | Private Real Estate
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	$ 0	0
Number of funds for which redemption has been requested | fund	3
Pension Plans | U.S. Plans | Private Equity
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	$ 23.3	28.4
Pension Plans | International Plans
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	1,486.2	1,444.3	$ 2,431.6
Unfunded Commitments	42.1	73.7
Pension Plans | International Plans | Debt Securities, Commingled Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	42.1	73.7
Pension Plans | International Plans | Other, Commingled Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Unfunded Commitments	$ 0	$ 0
Redemption Notice Period Range	10 days	10 days
Plan assets measured using NAV as a practical expedient | Pension Plans | U.S. Plans
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 435.7	$ 494.2
Plan assets measured using NAV as a practical expedient | Pension Plans | U.S. Plans | Debt Securities, Commingled Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	102.3	65
Plan assets measured using NAV as a practical expedient | Pension Plans | U.S. Plans | Other, Commingled Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	96.8	147.4
Plan assets measured using NAV as a practical expedient | Pension Plans | U.S. Plans | Private Real Estate
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	188.9	238.9
Plan assets measured using NAV as a practical expedient | Pension Plans | U.S. Plans | Private Equity
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	47.7	42.9
Plan assets measured using NAV as a practical expedient | Pension Plans | International Plans
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	539.5	1,033.2
Plan assets measured using NAV as a practical expedient | Pension Plans | International Plans | Debt Securities, Commingled Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	191.4	788.8
Plan assets measured using NAV as a practical expedient | Pension Plans | International Plans | Other, Commingled Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 348.1	244.4
Plan assets measured using NAV as a practical expedient | Pension Plans | International Plans | Private Real Estate
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value
Plan assets measured using NAV as a practical expedient | Pension Plans | International Plans | Private Equity
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value
Minimum | Pension Plans | U.S. Plans | Debt Securities, Commingled Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption Notice Period Range	15 days
Minimum | Pension Plans | U.S. Plans | Other, Commingled Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption Notice Period Range	5 days	5 days
Minimum | Pension Plans | U.S. Plans | Private Real Estate
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption Notice Period Range	60 days	60 days
Requested redemption, estimated period for full receipt	3 years
Maximum
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption Notice Period Range	120 days
Maximum | Pension Plans | U.S. Plans | Debt Securities, Commingled Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption Notice Period Range	45 days
Maximum | Pension Plans | U.S. Plans | Other, Commingled Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption Notice Period Range	90 days	90 days
Maximum | Pension Plans | U.S. Plans | Private Real Estate
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption Notice Period Range	90 days	90 days
Requested redemption, estimated period for full receipt	5 years
Maximum | Pension Plans | International Plans | Debt Securities, Commingled Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption Notice Period Range		120 days

Litigation and contingencies (D

Litigation and contingencies (Details) - USD ($) $ in Millions	Jan. 31, 2024	Dec. 31, 2023
Loss Contingencies [Line Items]
Amount related to unreserved tax-related matters, inclusive of interest (up to)		$ 119
Subsequent Event
Loss Contingencies [Line Items]
Loss contingency, damages sought value	$ 28
Loss contingency, settlement amount	$ 8
Elmira Site
Loss Contingencies [Line Items]
Environmental remediation estimated liability		28
Environmental recoveries receivable		$ 32
Other Current Liabilities
Loss Contingencies [Line Items]
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]		Other accrued liabilities
Other Current Liabilities | Elmira Site
Loss Contingencies [Line Items]
Environmental remediation estimated liability		$ 13
Other Noncurrent Liabilities
Loss Contingencies [Line Items]
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]		Other long-term liabilities
Other Noncurrent Liabilities | Elmira Site
Loss Contingencies [Line Items]
Environmental remediation estimated liability		$ 15

Stockholders' equity - Narrativ

Stockholders' equity - Narrative (Details) - $ / shares	Dec. 31, 2023	Dec. 31, 2022
Equity [Abstract]
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	40,000,000
Preferred stock, par value (in dollars per share)	$ 1
Unissued common stock reserved for stock-based incentive plans and convertible debt (in shares)	11,500,000

Stockholders' equity - Accumula

Stockholders' equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 21.8	$ (64.4)	$ (312.1)
Other comprehensive income (loss) before reclassifications	(142.8)	38	58.6
Amounts reclassified from accumulated other comprehensive loss	418.5	150.1	616.8
Current period other comprehensive income	275.7	188.1	675.4
Ending Balance	(138.4)	21.8	(64.4)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(3,076)	(3,264.1)	(3,939.5)
Ending Balance	(2,800.3)	(3,076)	(3,264.1)
Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(977.4)	(866.2)	(826.6)
Other comprehensive income (loss) before reclassifications	68.3	(114.1)	(43.6)
Amounts reclassified from accumulated other comprehensive loss	(3.7)	2.9	4
Current period other comprehensive income	64.6	(111.2)	(39.6)
Ending Balance	(912.8)	(977.4)	(866.2)
Postretirement Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(2,098.6)	(2,397.9)	(3,112.9)
Other comprehensive income (loss) before reclassifications	(211.1)	152.1	102.2
Amounts reclassified from accumulated other comprehensive loss	422.2	147.2	612.8
Current period other comprehensive income	211.1	299.3	715
Ending Balance	$ (1,887.5)	$ (2,098.6)	$ (2,397.9)

Stockholders' equity - Amounts

Stockholders' equity - Amounts Reclassified Out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (expense), net	$ 393.9	$ 82.4	$ 580.3
Loss before income taxes	347.8	62.6	461.7
Income tax	79.3	42.3	(11.9)
Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Loss before income taxes	420.3	156.1	676.1
Income tax	(1.8)	(6)	(59.3)
Consolidated net loss	418.5	150.1	616.8
Reclassification out of Accumulated Other Comprehensive Income | Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (expense), net	(3.7)	2.9	4
Reclassification out of Accumulated Other Comprehensive Income | Amortization of prior service credit
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (expense), net	(5.4)	(5.8)	(6.2)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of actuarial losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (expense), net	80.5	159	178.9
Reclassification out of Accumulated Other Comprehensive Income | Settlement losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other (expense), net	$ 348.9	$ 0	$ 499.4

Stockholders' equity - Changes

Stockholders' equity - Changes in Common Stock and Treasury Stock (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance (in shares)	73.3	72.5	66.8
Debt exchange (in shares)			4.6
Stock-based compensation (in shares)	0.7	0.8	1.1
Ending Balance (in shares)	74	73.3	72.5
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance (in shares)	5.5	5.3	3.8
Debt exchange (in shares)			1.2
Stock-based compensation (in shares)	0.1	0.2	0.3
Ending Balance (in shares)	5.6	5.5	5.3

Segment information - Operation

Segment information - Operations by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Customer revenue	$ 1,725.1	$ 1,699.9	$ 1,745.8
Gross profit	551.3	529.6	572
Total assets	1,965.4	2,065.6	2,419.5
DWS
Segment Reporting Information [Line Items]
Customer revenue	546.1	509.9	574.5
CA&I
Segment Reporting Information [Line Items]
Customer revenue	531	520.3	485.6
ECS
Segment Reporting Information [Line Items]
Customer revenue	648	669.7	685.7
Intersegment Eliminations
Segment Reporting Information [Line Items]
Customer revenue	0	0	(1.4)
Intersegment Eliminations | DWS
Segment Reporting Information [Line Items]
Customer revenue	0	0	0
Intersegment Eliminations | CA&I
Segment Reporting Information [Line Items]
Customer revenue	0	0	0
Intersegment Eliminations | ECS
Segment Reporting Information [Line Items]
Customer revenue	0	0	(1.4)
Operating Segments
Segment Reporting Information [Line Items]
Customer revenue	1,725.1	1,699.9	1,747.2
Gross profit	554.7	550.8	562.3
Depreciation and amortization	121.8	159.2	129.1
Total assets	1,196.6	1,190.6	1,237.2
Capital expenditures	65.9	68.4	78.9
Operating Segments | DWS
Segment Reporting Information [Line Items]
Customer revenue	546.1	509.9	574.5
Gross profit	76.2	71.5	79.3
Depreciation and amortization	29.2	38.9	18.6
Total assets	379.2	346.5	353.5
Capital expenditures	3.9	6.3	13.5
Operating Segments | CA&I
Segment Reporting Information [Line Items]
Customer revenue	531	520.3	485.6
Gross profit	81.9	47.3	47.2
Depreciation and amortization	29.8	42.3	55
Total assets	249.6	268.3	289.6
Capital expenditures	7.1	6.5	13.2
Operating Segments | ECS
Segment Reporting Information [Line Items]
Customer revenue	648	669.7	687.1
Gross profit	396.6	432	435.8
Depreciation and amortization	62.8	78	55.5
Total assets	567.8	575.8	594.1
Capital expenditures	$ 54.9	$ 55.6	$ 52.2

Segment information - Customer

Segment information - Customer Revenue by Classes of Similar Products or Services (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue from External Customer [Line Items]
Revenue	$ 2,015.4	$ 1,979.9	$ 2,054.4
Operating Segments
Revenue from External Customer [Line Items]
Revenue	1,725.1	1,699.9	1,747.2
Segment Reconciling Items
Revenue from External Customer [Line Items]
Revenue	290.3	280	308.6
Elimination
Revenue from External Customer [Line Items]
Revenue	$ 0	$ 0	$ (1.4)

Segment information - Reconcili

Segment information - Reconciliation of Segment Operating Income to Consolidated Income Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit	$ 551.3	$ 529.6	$ 572
Selling, general and administrative expense	(450.3)	(453.2)	(389.5)
Research and development expense	(24.1)	(24.2)	(28.5)
Interest expense	(30.8)	(32.4)	(35.4)
Other (expense), net	(393.9)	(82.4)	(580.3)
Loss before income taxes	(347.8)	(62.6)	(461.7)
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit	554.7	550.8	562.3
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit	(3.4)	(21.2)	9.7
Selling, general and administrative expense	(450.3)	(453.2)	(389.5)
Research and development expense	(24.1)	(24.2)	(28.5)
Interest expense	(30.8)	(32.4)	(35.4)
Other (expense), net	$ (393.9)	$ (82.4)	$ (580.3)

Segment information - Reconci_2

Segment information - Reconciliation of Total Business Segment Assets to Consolidated Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 1,965.4	$ 2,065.6	$ 2,419.5
Cash and cash equivalents	387.7	391.8
Deferred income taxes	114	118.6
Operating lease right-of-use assets	35.4	42.5
Prepaid postretirement assets	38	119.5
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,196.6	1,190.6	1,237.2
Segment Reconciling Items
Segment Reporting, Asset Reconciling Item [Line Items]
Other assets	82.1	96.8	206.9
Cash and cash equivalents	387.7	391.8	552.9
Deferred income taxes	114	118.6	125.3
Operating lease right-of-use assets	35.4	42.5	62.7
Prepaid postretirement assets	38	119.5	159.7
Corporate
Segment Reporting, Asset Reconciling Item [Line Items]
Other assets	$ 111.6	$ 105.8	$ 74.8

Segment information - Revenue,

Segment information - Revenue, Properties and Outsourcing Assets by Geographic Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 2,015.4	$ 1,979.9	$ 2,054.4
Properties, net	64.3	75.9	86.5
Outsourcing assets, net	31.6	66.4	124.6
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	889	854.9	856.2
Properties, net	45.9	52.5	62.5
Outsourcing assets, net	19.5	36	66.2
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	289.3	228	284.9
Outsourcing assets, net	2	17.9	36.3
Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Outsourcing assets, net	7.8	9.5	16.7
Other foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	837.1	897	913.3
Properties, net	18.4	23.4	24
Outsourcing assets, net	$ 2.3	$ 3	$ 5.4

Remaining performance obligat_2

Remaining performance obligations (Details) $ in Billions	Dec. 31, 2023 USD ($)
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 0.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percent to be recognized as revenue	33%
Period over which remaining performance obligations are expected to be recognized as revenue	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percent to be recognized as revenue	25%
Period over which remaining performance obligations are expected to be recognized as revenue	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percent to be recognized as revenue	18%
Period over which remaining performance obligations are expected to be recognized as revenue	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percent to be recognized as revenue	15%
Period over which remaining performance obligations are expected to be recognized as revenue	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percent to be recognized as revenue	9%
Period over which remaining performance obligations are expected to be recognized as revenue

Schedule II - Valuation and Q_2

Schedule II - Valuation and Qualifying Accounts (Details) - Allowance for Credit Losses - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Allowance for credit losses (deducted from accounts receivable):
Balance at Beginning of Period	$ 9.1	$ 8	$ 9.2
Additions Charged to Costs and Expenses		0.3
Additions Charged to Costs and Expenses	(0.2)		(0.6)
Deductions	0.6	0.8	(0.6)
Balance at End of Period	$ 9.5	$ 9.1	$ 8