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

X

- 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

X

- 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