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Gross Carrying Amount and Accumulated Amortization for Teradata's Acquired Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Acquired Finite-Lived Intangible Assets |  |
Accumulated Amortization and Currency Translation Adjustments | $ (65) | $ (31)
Gross Carrying Amount | 251 | 194
Minimum |  |
Acquired Finite-Lived Intangible Assets |  |
Original Amortization Life (in Years) | 1 year |
Maximum |  |
Acquired Finite-Lived Intangible Assets |  |
Original Amortization Life (in Years) | 10 years |
Intellectual Property/Developed Technology |  |
Acquired Finite-Lived Intangible Assets |  |
Accumulated Amortization and Currency Translation Adjustments | (48) | (23)
Gross Carrying Amount | 153 | 122
Intellectual Property/Developed Technology | Minimum |  |
Acquired Finite-Lived Intangible Assets |  |
Original Amortization Life (in Years) | 1 year |
Intellectual Property/Developed Technology | Maximum |  |
Acquired Finite-Lived Intangible Assets |  |
Original Amortization Life (in Years) | 7 years |
Customer Relationships |  |
Acquired Finite-Lived Intangible Assets |  |
Accumulated Amortization and Currency Translation Adjustments | (14) | (6)
Gross Carrying Amount | 77 | 55
Customer Relationships | Minimum |  |
Acquired Finite-Lived Intangible Assets |  |
Original Amortization Life (in Years) | 3 years |
Customer Relationships | Maximum |  |
Acquired Finite-Lived Intangible Assets |  |
Original Amortization Life (in Years) | 10 years |
Trademarks/Trade names |  |
Acquired Finite-Lived Intangible Assets |  |
Accumulated Amortization and Currency Translation Adjustments | (2) | (1)
Gross Carrying Amount | 15 | 11
Trademarks/Trade names | Minimum |  |
Acquired Finite-Lived Intangible Assets |  |
Original Amortization Life (in Years) | 5 years |
Trademarks/Trade names | Maximum |  |
Acquired Finite-Lived Intangible Assets |  |
Original Amortization Life (in Years) | 10 years |
In-Process Research And Development |  |
Acquired Finite-Lived Intangible Assets |  |
Original Amortization Life (in Years) | 5 years |
Accumulated Amortization and Currency Translation Adjustments | 0 | 0
Gross Carrying Amount | 5 | 5
Non-compete Agreements |  |
Acquired Finite-Lived Intangible Assets |  |
Accumulated Amortization and Currency Translation Adjustments | (1) | (1)
Gross Carrying Amount | $ 1 | $ 1
Non-compete Agreements | Minimum |  |
Acquired Finite-Lived Intangible Assets |  |
Original Amortization Life (in Years) | 2 years |
Non-compete Agreements | Maximum |  |
Acquired Finite-Lived Intangible Assets |  |
Original Amortization Life (in Years) | 2 years 6 months |

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- Definition Finite Lived Intangible Assets Accumulated Amortization And Currency Translation Adjustment + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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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=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + 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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Period Type: | duration