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Subsequent Events - Additional Information (Details) (Subsequent Event, USD $) | May 04, 2015
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Subsequent Event |
Equity, Class of Treasury Stock [Line Items] |
Additional amount authorized for repurchase of common stock | $ 300,000,000 tdc_StockRepurchaseProgramAdditionalAuthorizedAmount / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Total amount authorized for common stock repurchase | $ 431,000,000 us-gaap_StockRepurchaseProgramAuthorizedAmount1 / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

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- Definition Stock Repurchase Program, Additional Authorized Amount + References No definition available. + Details
Name: | tdc_StockRepurchaseProgramAdditionalAuthorizedAmount
Namespace Prefix: | tdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant