XML 123 R85.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Derivative Instruments and Hedging Activities - Schedule of Foreign Exchange Contracts (Detail) - USD ($) $ in Millions | 1 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Derivative |  |  |
Net contract notional amount of foreign exchange forward contracts |  | $ 35 | $ 23
Foreign Exchange Contract |  |  |
Derivative |  |  |
Notional amount of contracts |  | 256 | 147
Interest Rate Swap |  |  |
Derivative |  |  |
Interest rate swap, agreement period | 5 years |  |
Notional amount of contracts | $ 500 | $ 500 | $ 0

X
- 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
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Notional Amount Of Foreign Currency Fair Value Hedge Derivatives Net Basis + References No definition available. + Details
Name: | tdc_NotionalAmountOfForeignCurrencyFairValueHedgeDerivativesNetBasis
Namespace Prefix: | tdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |