Revenue - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue from Contract with Customer [Abstract]
Depreciation and amortization of capitalized contract costs	$ 4.5	$ 6.4	$ 7.5	$ 12.6
Disaggregation of Revenue [Line Items]
Remaining performance obligation	$ 900.0		$ 900.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01
Disaggregation of Revenue [Line Items]
Remaining performance obligation, percent to be recognized as revenue	22.00%		22.00%
Performance obligations expected recognition period	6 months		6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Disaggregation of Revenue [Line Items]
Remaining performance obligation, percent to be recognized as revenue	29.00%		29.00%
Performance obligations expected recognition period	1 year		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Disaggregation of Revenue [Line Items]
Remaining performance obligation, percent to be recognized as revenue	25.00%		25.00%
Performance obligations expected recognition period	1 year		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Disaggregation of Revenue [Line Items]
Remaining performance obligation, percent to be recognized as revenue	16.00%		16.00%
Performance obligations expected recognition period	1 year		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-01-01
Disaggregation of Revenue [Line Items]
Remaining performance obligation, percent to be recognized as revenue	8.00%		8.00%
Performance obligations expected recognition period

UNISYS CORP 10-Q