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Goodwill and Acquired Intangible Assets Gross Carrying Amount and Accumulated Amortization for Teradata Acquired Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Acquired Finite-Lived Intangible Assets |  |
Accumulated Amortization and Currency Translation Adjustments | $ (133)tdc_FiniteLivedIntangibleAssetsAccumulatedAmortizationAndCurrencyTranslationAdjustment | $ (102)tdc_FiniteLivedIntangibleAssetsAccumulatedAmortizationAndCurrencyTranslationAdjustment
Gross Carrying Amount | 269 us-gaap_FiniteLivedIntangibleAssetsGross | 251 us-gaap_FiniteLivedIntangibleAssetsGross
Intellectual property/developed technology |  |
Acquired Finite-Lived Intangible Assets |  |
Accumulated Amortization and Currency Translation Adjustments | (95)tdc_FiniteLivedIntangibleAssetsAccumulatedAmortizationAndCurrencyTranslationAdjustment / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DevelopedTechnologyRightsMember | (70)tdc_FiniteLivedIntangibleAssetsAccumulatedAmortizationAndCurrencyTranslationAdjustment / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DevelopedTechnologyRightsMember
Gross Carrying Amount | 186 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DevelopedTechnologyRightsMember | 153 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DevelopedTechnologyRightsMember
Customer relationships |  |
Acquired Finite-Lived Intangible Assets |  |
Accumulated Amortization and Currency Translation Adjustments | (35)tdc_FiniteLivedIntangibleAssetsAccumulatedAmortizationAndCurrencyTranslationAdjustment / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember | (23)tdc_FiniteLivedIntangibleAssetsAccumulatedAmortizationAndCurrencyTranslationAdjustment / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Gross Carrying Amount | 77 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember | 77 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Trademarks/trade names |  |
Acquired Finite-Lived Intangible Assets |  |
Accumulated Amortization and Currency Translation Adjustments | (1)tdc_FiniteLivedIntangibleAssetsAccumulatedAmortizationAndCurrencyTranslationAdjustment / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember | (7)tdc_FiniteLivedIntangibleAssetsAccumulatedAmortizationAndCurrencyTranslationAdjustment / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember
Gross Carrying Amount | 1 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember | 15 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember
In-process research and development |  |
Acquired Finite-Lived Intangible Assets |  |
Amortization Life (in Years) | 5 years | 5 years
Accumulated Amortization and Currency Translation Adjustments | (2)tdc_FiniteLivedIntangibleAssetsAccumulatedAmortizationAndCurrencyTranslationAdjustment / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_InProcessResearchAndDevelopmentMember | (1)tdc_FiniteLivedIntangibleAssetsAccumulatedAmortizationAndCurrencyTranslationAdjustment / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_InProcessResearchAndDevelopmentMember
Gross Carrying Amount | 5 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_InProcessResearchAndDevelopmentMember | 5 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_InProcessResearchAndDevelopmentMember
Non-compete agreements |  |
Acquired Finite-Lived Intangible Assets |  |
Accumulated Amortization and Currency Translation Adjustments | 0 tdc_FiniteLivedIntangibleAssetsAccumulatedAmortizationAndCurrencyTranslationAdjustment / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember | (1)tdc_FiniteLivedIntangibleAssetsAccumulatedAmortizationAndCurrencyTranslationAdjustment / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember
Gross Carrying Amount | $ 0 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember | $ 1 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember
Minimum |  |
Acquired Finite-Lived Intangible Assets |  |
Amortization Life (in Years) |  |
Minimum | Intellectual property/developed technology |  |
Acquired Finite-Lived Intangible Assets |  |
Amortization Life (in Years) | 1 year | 1 year
Minimum | Customer relationships |  |
Acquired Finite-Lived Intangible Assets |  |
Amortization Life (in Years) | 3 years | 3 years
Minimum | Trademarks/trade names |  |
Acquired Finite-Lived Intangible Assets |  |
Amortization Life (in Years) | 5 years | 5 years
Minimum | Non-compete agreements |  |
Acquired Finite-Lived Intangible Assets |  |
Amortization Life (in Years) | 3 years | 3 years
Maximum |  |
Acquired Finite-Lived Intangible Assets |  |
Amortization Life (in Years) |  |
Maximum | Intellectual property/developed technology |  |
Acquired Finite-Lived Intangible Assets |  |
Amortization Life (in Years) | 7 years | 7 years
Maximum | Customer relationships |  |
Acquired Finite-Lived Intangible Assets |  |
Amortization Life (in Years) | 10 years | 10 years

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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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