v3.10.0.1
Document and Entity Information
9 Months Ended
Sep. 30, 2018
shares
Document And Entity Information [Abstract]  
Entity Registrant Name UNISYS CORP
Trading Symbol UIS
Entity Central Index Key 0000746838
Current Fiscal Year End Date --12-31
Entity Filer Category Accelerated Filer
Document Type 10-Q
Document Period End Date Sep. 30, 2018
Document Fiscal Year Focus 2018
Document Fiscal Period Focus Q3
Amendment Flag false
Entity Emerging Growth Company false
Entity Small Business false
Entity Common Stock, Shares Outstanding 51,024,602