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Employee Benefit Plans Weighted Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit (Detail) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Postemployment |  |  |
Discount rate | 3.50%tdc_PostemploymentBenefitAssumptionsUsedCalculatingBenefitObligationDiscountRate | 3.80%tdc_PostemploymentBenefitAssumptionsUsedCalculatingBenefitObligationDiscountRate |
Rate of compensation increase | 3.00%tdc_PostemploymentBenefitAssumptionsUsedCalculatingBenefitObligationRateofCompensationIncrease | 3.70%tdc_PostemploymentBenefitAssumptionsUsedCalculatingBenefitObligationRateofCompensationIncrease |
Involuntary turnover rate | 1.30%tdc_PostemploymentBenefitAssumptionsUsedCalculatingBenefitObligationInvoluntaryTurnoverRate | 1.00%tdc_PostemploymentBenefitAssumptionsUsedCalculatingBenefitObligationInvoluntaryTurnoverRate |
Discount rate | 3.80%tdc_PostemploymentBenefitAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate | 3.40%tdc_PostemploymentBenefitAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate | 4.10%tdc_PostemploymentBenefitAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate
Rate of compensation increase | 3.70%tdc_PostemploymentBenefitAssumptionsUsedCalculatingNetPeriodicBenefitCostRateofCompensationIncrease | 3.80%tdc_PostemploymentBenefitAssumptionsUsedCalculatingNetPeriodicBenefitCostRateofCompensationIncrease | 3.70%tdc_PostemploymentBenefitAssumptionsUsedCalculatingNetPeriodicBenefitCostRateofCompensationIncrease
Involuntary turnover rate | 1.00%tdc_PostemploymentBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostInvoluntaryTurnoverRate | 1.00%tdc_PostemploymentBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostInvoluntaryTurnoverRate | 1.50%tdc_PostemploymentBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostInvoluntaryTurnoverRate
Foreign Pension Plan |  |  |
Pension Benefit |  |  |
Discount rate | 2.30%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember | 3.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember |
Rate of compensation increase | 3.30%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember | 3.20%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember |
Discount rate | 3.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember | 3.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember | 3.70%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember
Rate of compensation increase | 3.20%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember | 3.30%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember | 3.30%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember
Expected return on plan assets | 3.40%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember | 3.40%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember | 4.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember

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- Definition Postemployment Benefit, Assumptions Used Calculating Benefit Obligation, Discount Rate + References No definition available. + Details
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- Definition Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Involuntary Turnover Rate + References No definition available. + Details
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- Definition Postemployment Benefit, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase + References No definition available. + Details
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- Definition Postemployment Benefit, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase + References No definition available. + Details
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- Definition Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Involuntary Turnover Rate + References No definition available. + Details
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- Definition The interest rate used to adjust for the time value of money for the plan. + 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 (k)(1) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition Expected rate of compensation increases (for pay-related plans). + 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 (k)(2) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Glossary Expected Long-Term Rate of Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512013 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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