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Segment, Other Supplemental Information and Concentrations Regional Segment Revenue and Gross Margin for Company (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment revenue |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 761 us-gaap_Revenues | $ 667 us-gaap_Revenues | $ 676 us-gaap_Revenues | $ 628 us-gaap_Revenues | $ 769 us-gaap_Revenues | $ 666 us-gaap_Revenues | $ 670 us-gaap_Revenues | $ 587 us-gaap_Revenues | $ 2,732 us-gaap_Revenues | $ 2,692 us-gaap_Revenues | $ 2,665 us-gaap_Revenues
Segment gross margin |  |  |  |  |  |  |  |  |  |  |
Gross margin | 425 us-gaap_GrossProfit | 350 us-gaap_GrossProfit | 371 us-gaap_GrossProfit | 333 us-gaap_GrossProfit | 431 us-gaap_GrossProfit | 358 us-gaap_GrossProfit | 379 us-gaap_GrossProfit | 305 us-gaap_GrossProfit | 1,479 us-gaap_GrossProfit | 1,473 us-gaap_GrossProfit | 1,491 us-gaap_GrossProfit
Selling, general and administrative expenses |  |  |  |  |  |  |  |  | 770 us-gaap_SellingGeneralAndAdministrativeExpense | 757 us-gaap_SellingGeneralAndAdministrativeExpense | 728 us-gaap_SellingGeneralAndAdministrativeExpense
Research and development expenses |  |  |  |  |  |  |  |  | 206 us-gaap_ResearchAndDevelopmentExpense | 184 us-gaap_ResearchAndDevelopmentExpense | 183 us-gaap_ResearchAndDevelopmentExpense
Income from operations | 158 us-gaap_OperatingIncomeLoss | 123 us-gaap_OperatingIncomeLoss | 133 us-gaap_OperatingIncomeLoss | 89 us-gaap_OperatingIncomeLoss | 177 us-gaap_OperatingIncomeLoss | 132 us-gaap_OperatingIncomeLoss | 147 us-gaap_OperatingIncomeLoss | 76 us-gaap_OperatingIncomeLoss | 503 us-gaap_OperatingIncomeLoss | 532 us-gaap_OperatingIncomeLoss | 580 us-gaap_OperatingIncomeLoss
Other expense, net |  |  |  |  |  |  |  |  | (9)us-gaap_NonoperatingIncomeExpense | (24)us-gaap_NonoperatingIncomeExpense | (2)us-gaap_NonoperatingIncomeExpense
Income before income taxes |  |  |  |  |  |  |  |  | 494 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 508 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 578 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Americas |  |  |  |  |  |  |  |  |  |  |
Segment revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 1,619 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = tdc_NorthAmericaAndLatinAmericaRegionMember | 1,633 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = tdc_NorthAmericaAndLatinAmericaRegionMember | 1,619 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = tdc_NorthAmericaAndLatinAmericaRegionMember
Segment gross margin |  |  |  |  |  |  |  |  |  |  |
Gross margin |  |  |  |  |  |  |  |  | 943 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = tdc_NorthAmericaAndLatinAmericaRegionMember | 947 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = tdc_NorthAmericaAndLatinAmericaRegionMember | 967 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = tdc_NorthAmericaAndLatinAmericaRegionMember
International |  |  |  |  |  |  |  |  |  |  |
Segment revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 1,113 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = tdc_InternationalMember | 1,059 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = tdc_InternationalMember | 1,046 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = tdc_InternationalMember
Segment gross margin |  |  |  |  |  |  |  |  |  |  |
Gross margin |  |  |  |  |  |  |  |  | 536 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = tdc_InternationalMember | 526 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = tdc_InternationalMember | 524 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = tdc_InternationalMember
United States |  |  |  |  |  |  |  |  |  |  |
Segment revenue |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 1,458 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = tdc_UnitedStatesMember | $ 1,511 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = tdc_UnitedStatesMember | $ 1,478 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = tdc_UnitedStatesMember

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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35710027&loc=d3e41242-110953 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Article 5 + Details
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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 5 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 4 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34747878&loc=d3e3636-108311 + Details
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