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Commitments and Contingencies - Additional Information (Detail) In Millions, unless otherwise specified		1 Months Ended		1 Months Ended
	Mar. 31, 2015 USD ($)	Apr. 30, 2007 Ministry Of Justice Of Belgium EUR (€)	Apr. 30, 2008 Ministry Of Justice Of Belgium EUR (€)	Aug. 31, 2012 Health Information Management (HIM) USD ($)
Loss Contingencies [Line Items]
Loss contingency, damages sought value		€ 28us-gaap_LossContingencyDamagesSoughtValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = uis_MinistryOfJusticeOfBelgiumMember		$ 35us-gaap_LossContingencyDamagesSoughtValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = uis_SaleOfAssetsMember
Counterclaim against termination of contract			18.5uis_ContractTerminationCounterclaimsGovernmentsOtherThanUSFederalGovernment / us-gaap_LossContingenciesByNatureOfContingencyAxis = uis_MinistryOfJusticeOfBelgiumMember
Unreserved tax-related matters, inclusive of interest	$ 108uis_UnreservedTaxRelatedMattersInclusiveOfInterest

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- Definition

Contract Termination Counterclaims Governments Other Than US Federal Government

+ References

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- Definition

Unreserved Tax Related Matters Inclusive of Interest

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- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349



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-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

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-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

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