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Summary Of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Summary Of Significant Accounting Policies [Line Items] |  |  |
Advertising costs incurred | $ 8.0 us-gaap_AdvertisingExpense | $ 2.5 us-gaap_AdvertisingExpense | $ 3.1 us-gaap_AdvertisingExpense
Maximum estimated revenue-producing lives of computer software products from the date of release | 3 years |  |
Defined Benefit Plan, Plan Assets at Fair Value, Valuation Inputs | Four |  |
Intelligent Processing Solutions Ltd. |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Percentage of Ownership interest | 51.00%uis_PercentageOfOwnershipInterests / dei_LegalEntityAxis = uis_IntelligentProcessingSolutionsLtdMember |  |
Building | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives | 20 years |  |
Building | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives | 50 years |  |
Machinery and Office Equipment | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives | 4 years |  |
Machinery and Office Equipment | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives | 7 years |  |
Rental Equipment |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives | 4 years |  |
Internal-Use Software | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives | 3 years |  |
Internal-Use Software | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives | 10 years |  |

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- Definition Percentage Of Ownership Interests + References No definition available. + Details
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- Details
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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition This element represents the information provided by management related to the valuation inputs used to develop the fair value measurements of plan assets as of the date of the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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