| Cover | 12 Months Ended |
| Dec. 31, 2022 | |
| Document Information [Line Items] | |
| Document Type | DEF 14A |
| Amendment Flag | false |
| Entity Information [Line Items] | |
| Entity Registrant Name | Unisys Corporation |
| Entity Central Index Key | 0000746838 |
| Pay vs Performance Disclosure | 12 Months Ended | ||
| Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | |
| Pay vs Performance Disclosure [Table] | |||
| Pay vs Performance [Table Text Block] | Pay Versus Performance In accordance with rules adopted by the SEC pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, we provide the following disclosure regarding executive compensation paid to our principal executive officer (“PEO”) and Non-PEO NEOs and Company financial performance for each of the fiscal years ended December 31, 2022, 2021, and 2020. Average Average Value of Initial Fixed $100 (4) Year Summary (1) Compensation (1)(2)(3) Compensation (1) Compensation (1)(2)(3) Total Peer Group Net Non-GAAP (5) (a) (b) (c) (d) (e) (f) (g) (h) (i) 2022 7,092,737 (28,601) 1,771,921 524,328 43.09 104.76 (104.9) 159 2021 8,059,535 8,248,348 2,877,154 2,618,113 173.44 128.59 (449.8) 193 2020 7,234,194 11,800,166 2,186,982 2,649,415 165.94 122.62 (317.2) 153 (1) Peter Altabef was our PEO for each year presented. The individuals comprising the Non-PEO NEOs for each year presented are listed below. 2020 2021 2022 Michael M. Thomson Michael M. Thomson Debra McCann Eric Hutto Gerald P. Kenney Michael M. Thomson Vishal Gupta Katherine Ebrahimi Claudius Sokenu Gerald P. Kenney Shalabh Gupta Katherine Ebrahimi Venkatapathi Puvvada Eric Hutto Teresa Poggenpohl Jeffrey E. Renzi — Gerald P. Kenney (2) The amounts shown for “Compensation Actually Paid” have been calculated in accordance with Item 402(v) of Regulation S-K and do not reflect compensation actually earned, realized, or received by the Company’s NEOs. These amounts reflect the amount shown in the “Total” column set forth in the Summary Compensation Table with certain adjustments as described in footnote 3 below. (3) “Compensation Actually Paid” reflects the exclusions and inclusions of certain amounts for the PEO and the Non-PEO NEOs as set forth below. Equity values are calculated in accordance with FASB ASC Topic 718. Amounts in the “Exclusion of Stock Awards” column are the totals from the “Stock Awards” columns set forth in the Summary Compensation Table. Amounts in the “Exclusion of Change in Pension Value” column reflect the amounts attributable to the “Change in Pension Value” reported in the Summary Compensation Table. Amounts in the “Inclusion of Pension Service Cost” are based on the service cost for services rendered during the listed year. Year Summary Exclusion in Pension Exclusion of Inclusion of Inclusion of Compensation 2022 7,092,737 0 (4,384,201) 0 (2,737,137) (28,601) 2021 8,059,535 0 (4,234,347) 0 4,423,160 8,248,348 2020 7,234,194 0 (3,592,245) 0 8,158,216 11,800,166 Year Average Average Exclusion of Average Average Inclusion Average Average 2022 1,771,921 0 (875,497) 0 (372,096) 524,328 2021 2,877,154 0 (1,674,572) 0 1,415,531 2,618,113 2020 2,186,982 (7,621) (480,026) 0 950,080 2,649,415 The amounts in the “Inclusion of Equity Values” columns in the tables above are derived from the amounts set forth in the following tables: Year Year-End Fair Value Change in Fair Value Change in Fair Value Fair Value at Last Day Total - Inclusion of 2022 549,615 (3,279,239) (7,513) 0 (2,737,137) 2021 3,050,308 (295,991) 1,668,843 0 4,423,160 2020 4,554,481 2,359,775 1,243,960 0 8,158,216 Year Average Year-End Average Change in Fair Average Change in Average Fair Value at Total - Average 2022 150,886 (501,674) 2,569 (23,877) (372,096) 2021 1,253,003 (36,802) 199,330 0 1,415,531 2020 620,744 235,162 116,267 (22,093) 950,080 (4) The Peer Group TSR set forth in this table utilizes the Standard & Poor’s 500 Information Technology Services Index (“S&P 500 IT Services Index”), which we also utilize in the stock performance graph required by Item 201(e) of Regulation S-K included in our Annual Report for the year ended December 31, 2022. The comparison assumes $100 was invested for the period starting December 31, 2019, through the end of the listed year in the Company and in the S&P 500 IT Services Index, respectively. (5) We determined Non-GAAP Operating Profit to be the most important financial performance measure used to link Company performance to Compensation Actually Paid to our PEO and Non-PEO NEOs in 2022. Non-GAAP Operating Profit is defined as GAAP Operating Income excluding pretax post-retirement expense, pretax charges in connection with cost-reduction activities, non-operational legal reserves, loss on debt exchange transactions and other non-operational income/expense. Non-GAAP Operating Profit is subject to adjustment by the Chief Executive Officer and the Compensation Committee of the Board for special items related to discontinued operations, reorganizations, restructurings or significant non-operational items. | ||
| Company Selected Measure Name | Non-GAAP Operating Profit | ||
| Peer Group Issuers, Footnote [Text Block] | The Peer Group TSR set forth in this table utilizes the Standard & Poor’s 500 Information Technology Services Index (“S&P 500 IT Services Index”), which we also utilize in the stock performance graph required by Item 201(e) of Regulation S-K included in our Annual Report for the year ended December 31, 2022. The comparison assumes $100 was invested for the period starting December 31, 2019, through the end of the listed year in the Company and in the S&P 500 IT Services Index, respectively. | ||
| PEO Total Compensation Amount | $ 7,092,737 | $ 8,059,535 | $ 7,234,194 |
| PEO Actually Paid Compensation Amount | $ (28,601) | 8,248,348 | 11,800,166 |
| Adjustment To PEO Compensation, Footnote [Text Block] | “Compensation Actually Paid” reflects the exclusions and inclusions of certain amounts for the PEO and the Non-PEO NEOs as set forth below. Equity values are calculated in accordance with FASB ASC Topic 718. Amounts in the “Exclusion of Stock Awards” column are the totals from the “Stock Awards” columns set forth in the Summary Compensation Table. Amounts in the “Exclusion of Change in Pension Value” column reflect the amounts attributable to the “Change in Pension Value” reported in the Summary Compensation Table. Amounts in the “Inclusion of Pension Service Cost” are based on the service cost for services rendered during the listed year. Year Summary Exclusion in Pension Exclusion of Inclusion of Inclusion of Compensation 2022 7,092,737 0 (4,384,201) 0 (2,737,137) (28,601) 2021 8,059,535 0 (4,234,347) 0 4,423,160 8,248,348 2020 7,234,194 0 (3,592,245) 0 8,158,216 11,800,166 Year Average Average Exclusion of Average Average Inclusion Average Average 2022 1,771,921 0 (875,497) 0 (372,096) 524,328 2021 2,877,154 0 (1,674,572) 0 1,415,531 2,618,113 2020 2,186,982 (7,621) (480,026) 0 950,080 2,649,415 The amounts in the “Inclusion of Equity Values” columns in the tables above are derived from the amounts set forth in the following tables: Year Year-End Fair Value Change in Fair Value Change in Fair Value Fair Value at Last Day Total - Inclusion of 2022 549,615 (3,279,239) (7,513) 0 (2,737,137) 2021 3,050,308 (295,991) 1,668,843 0 4,423,160 2020 4,554,481 2,359,775 1,243,960 0 8,158,216 Year Average Year-End Average Change in Fair Average Change in Average Fair Value at Total - Average 2022 150,886 (501,674) 2,569 (23,877) (372,096) 2021 1,253,003 (36,802) 199,330 0 1,415,531 2020 620,744 235,162 116,267 (22,093) 950,080 | ||
| Non-PEO NEO Average Total Compensation Amount | $ 1,771,921 | 2,877,154 | 2,186,982 |
| Non-PEO NEO Average Compensation Actually Paid Amount | $ 524,328 | 2,618,113 | 2,649,415 |
| Adjustment to Non-PEO NEO Compensation Footnote [Text Block] | “Compensation Actually Paid” reflects the exclusions and inclusions of certain amounts for the PEO and the Non-PEO NEOs as set forth below. Equity values are calculated in accordance with FASB ASC Topic 718. Amounts in the “Exclusion of Stock Awards” column are the totals from the “Stock Awards” columns set forth in the Summary Compensation Table. Amounts in the “Exclusion of Change in Pension Value” column reflect the amounts attributable to the “Change in Pension Value” reported in the Summary Compensation Table. Amounts in the “Inclusion of Pension Service Cost” are based on the service cost for services rendered during the listed year. Year Summary Exclusion in Pension Exclusion of Inclusion of Inclusion of Compensation 2022 7,092,737 0 (4,384,201) 0 (2,737,137) (28,601) 2021 8,059,535 0 (4,234,347) 0 4,423,160 8,248,348 2020 7,234,194 0 (3,592,245) 0 8,158,216 11,800,166 Year Average Average Exclusion of Average Average Inclusion Average Average 2022 1,771,921 0 (875,497) 0 (372,096) 524,328 2021 2,877,154 0 (1,674,572) 0 1,415,531 2,618,113 2020 2,186,982 (7,621) (480,026) 0 950,080 2,649,415 The amounts in the “Inclusion of Equity Values” columns in the tables above are derived from the amounts set forth in the following tables: Year Year-End Fair Value Change in Fair Value Change in Fair Value Fair Value at Last Day Total - Inclusion of 2022 549,615 (3,279,239) (7,513) 0 (2,737,137) 2021 3,050,308 (295,991) 1,668,843 0 4,423,160 2020 4,554,481 2,359,775 1,243,960 0 8,158,216 Year Average Year-End Average Change in Fair Average Change in Average Fair Value at Total - Average 2022 150,886 (501,674) 2,569 (23,877) (372,096) 2021 1,253,003 (36,802) 199,330 0 1,415,531 2020 620,744 235,162 116,267 (22,093) 950,080 | ||
| Compensation Actually Paid vs. Total Shareholder Return [Text Block] | Description of Relationship Between PEO and Other NEO Compensation Actually Paid and Company Total Shareholder Return (“TSR”) The following graph sets forth the relationship between “Compensation Actually Paid” to our PEO, the average of “Compensation Actually Paid” to our other NEOs, and the Company’s cumulative TSR over the three most recently completed fiscal years. PEO and Average Non-PEO NEO Compensation Actually Paid | ||
| Compensation Actually Paid vs. Net Income [Text Block] | Description of Relationship Between PEO and Other NEO Compensation Actually Paid and Net Income The following graph sets forth the relationship between “Compensation Actually Paid” to our PEO, the average of “Compensation Actually Paid” to our other NEOs, and our net income during the three most recently completed fiscal years. PEO and Average Non-PEO NEO Compensation Actually Paid | ||
| Compensation Actually Paid vs. Company Selected Measure [Text Block] | Description of Relationship Between PEO and Other NEO Compensation Actually Paid and Non-GAAP Operating Profit The following graph sets forth the relationship between “Compensation Actually Paid” to our PEO, the average of “Compensation Actually Paid” to our other NEOs, and our non-GAAP operating profit during the three most recently completed fiscal years. Non-GAAP operating profit is defined in footnote 5 to the Pay Versus Performance Table, above. PEO and Average Non-PEO NEO Compensation Actually Paid | ||
| Total Shareholder Return Vs Peer Group [Text Block] | Description of Relationship Between Company TSR and Peer Group TSR The following graph compares our cumulative TSR over the three most recently completed fiscal years to that of the S&P 500 IT Services Index over the same period. Comparison of Cumulative TSR of Unisys Corporation and S&P 500 IT | ||
| Tabular List [Table Text Block] | Tabular List of the Most Important Financial Measures The following table presents the three financial performance measures that the Company considers to have been the most important in linking Compensation Actually Paid to our PEOs and other NEOs for fiscal year 2022 to Company performance. The performance measures included in this table are not ranked by relative importance. Most Important Financial Performance Measures Relative Total Shareholder Return Revenue Free Cash Flow | ||
| Total Shareholder Return Amount | $ 43.09 | 173.44 | 165.94 |
| Peer Group Total Shareholder Return Amount | 104.76 | 128.59 | 122.62 |
| Net Income (Loss) | $ (104.9) | $ (449.8) | $ (317.2) |
| Company Selected Measure Amount | 159 | 193 | 153 |
| PEO Name | Peter Altabef | ||
| Additional 402(v) Disclosure [Text Block] | three | ||
| Measure [Axis]: 1 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | Relative Total Shareholder Return | ||
| Measure [Axis]: 2 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | Revenue | ||
| Measure [Axis]: 3 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | Free Cash Flow | ||
| PEO [Member] | Exclusion in Pension Value for PEO [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | $ 0 | $ 0 | $ 0 |
| PEO [Member] | Exclusion of Stock Awards for PEO [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (4,384,201) | (4,234,347) | (3,592,245) |
| PEO [Member] | Inclusion of Pension Service Cost for PEO [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 0 | 0 | 0 |
| PEO [Member] | Inclusion of Equity Values for PEO [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (2,737,137) | 4,423,160 | 8,158,216 |
| PEO [Member] | Year-End Fair Value of Equity Awards Granted During Year That Remained Unvested as of Last Day of Year for PEO [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 549,615 | 3,050,308 | 4,554,481 |
| PEO [Member] | Change in Fair Value from Last Day of Prior Year to Last Day of Year of Unvested Equity Awards for PEO [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (3,279,239) | (295,991) | 2,359,775 |
| PEO [Member] | Change in Fair Value from Last Day of Prior Year to Vesting Date of Unvested Equity Awards that Vested During Year for PEO [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (7,513) | 1,668,843 | 1,243,960 |
| PEO [Member] | Fair Value at Last Day of Prior Year of Equity Awards Forfeited During Year for PEO [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 0 | 0 | 0 |
| Non-PEO NEO [Member] | Average Exclusion of Change in Pension Value for Non-PEO NEOs [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 0 | 0 | (7,621) |
| Non-PEO NEO [Member] | Average Exclusion of Stock Awards for Non-PEO NEOs [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (875,497) | (1,674,572) | (480,026) |
| Non-PEO NEO [Member] | Average Inclusion of Pension Service Cost for Non-PEO NEOs [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 0 | 0 | 0 |
| Non-PEO NEO [Member] | Average Inclusion of Equity Values for Non-PEO NEOs [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (372,096) | 1,415,531 | 950,080 |
| Non-PEO NEO [Member] | Average Year-End Fair Value of Equity Awards Granted During Year That Remained Unvested as of Last Day of Year for Non-PEO NEOs [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 150,886 | 1,253,003 | 620,744 |
| Non-PEO NEO [Member] | Average Change in Fair Value from Last Day of Prior Year to Last Day of Year of Unvested Equity Awards for Non-PEO NEOs [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (501,674) | (36,802) | 235,162 |
| Non-PEO NEO [Member] | Average Change in Fair Value from Last Day of Prior Year to Vesting Date of Unvested Equity Awards that Vested During Year for Non- PEO NEOs [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 2,569 | 199,330 | 116,267 |
| Non-PEO NEO [Member] | Average Fair Value at Last Day of Prior Year of Equity Awards Forfeited During Year for Non-PEO NEOs [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | $ (23,877) | $ 0 | $ (22,093) |
