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Derivative Instruments and Hedging Activities - Schedule of Foreign Exchange Contracts (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Derivative |  |
Net contract notional amount of foreign exchange forward contracts | $ 17 tdc_NotionalAmountOfForeignCurrencyFairValueHedgeDerivativesNetBasis | $ 24 tdc_NotionalAmountOfForeignCurrencyFairValueHedgeDerivativesNetBasis
Foreign Exchange Contract |  |
Derivative |  |
Contract notional amount of foreign exchange forward contracts | $ 116 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember | $ 152 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Notional Amount Of Foreign Currency Fair Value Hedge Derivatives Net Basis + References No definition available. + Details
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- Details
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- Details
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