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Employee Benefit Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items] |
Amount of gains and losses to be amortized to the extent that they exceed 10% of the higher of the market-related value or the projected benefit obligation of each respective plan | 10.00%tdc_AmountOfGainLossAmortizedToExtendThatExceedTenPercentOfMarketRelatedValueOrProjectedBenefitObligation
Amount Company plans to contribute for postemployment benefit obligations plan | $ 5 tdc_ContributionsByEmployerToPostemploymentBenefitObligations
Foreign Pension Plan |
Defined Benefit Plan Disclosure [Line Items] |
Amount Company plans to contribute to the international pension plans | $ 8 us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember

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- Definition Amount of Gain Loss Amortized to the Extend that Exceed ten percent of the Market Related Value or the Projected Benefit Obligation + References No definition available. + Details
Name: | tdc_AmountOfGainLossAmortizedToExtendThatExceedTenPercentOfMarketRelatedValueOrProjectedBenefitObligation
Namespace Prefix: | tdc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Contributions By Employer to Postemployment Benefit Obligations + References No definition available. + Details
Name: | tdc_ContributionsByEmployerToPostemploymentBenefitObligations
Namespace Prefix: | tdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest 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 (g) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=us-gaap_ForeignPensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |