Document and Entity Information
6 Months Ended
Jun. 30, 2016
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 Large Accelerated Filer
Document Type 10-Q
Document Period End Date Jun. 30, 2016
Document Fiscal Year Focus 2016
Document Fiscal Period Focus Q2
Amendment Flag false
Entity Common Stock, Shares Outstanding 50,081,829