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Supplemental Financial Information (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Accounts receivable    
Trade $ 635tdc_TradeAccountsReceivable $ 731tdc_TradeAccountsReceivable
Other 3us-gaap_NontradeReceivablesCurrent 4us-gaap_NontradeReceivablesCurrent
Accounts receivable, gross 638us-gaap_AccountsReceivableGrossCurrent 735us-gaap_AccountsReceivableGrossCurrent
Less: allowance for doubtful accounts (19)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent (18)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Total accounts receivable, net 619us-gaap_AccountsReceivableNetCurrent 717us-gaap_AccountsReceivableNetCurrent
Inventories    
Finished goods 21us-gaap_InventoryFinishedGoodsNetOfReserves 39us-gaap_InventoryFinishedGoodsNetOfReserves
Service parts 17us-gaap_InventoryPartsAndComponentsNetOfReserves 17us-gaap_InventoryPartsAndComponentsNetOfReserves
Total inventories 38us-gaap_InventoryNet 56us-gaap_InventoryNet
Other current assets    
Current deferred tax assets 28us-gaap_DeferredTaxAssetsNetCurrent 34us-gaap_DeferredTaxAssetsNetCurrent
Other 53tdc_OtherOtherAssetsCurrent 61tdc_OtherOtherAssetsCurrent
Total other current assets 81us-gaap_OtherAssetsCurrent 95us-gaap_OtherAssetsCurrent
Property and equipment    
Land 8us-gaap_Land 8us-gaap_Land
Buildings and improvements 77us-gaap_BuildingsAndImprovementsGross 74us-gaap_BuildingsAndImprovementsGross
Machinery and other equipment 341us-gaap_MachineryAndEquipmentGross 309us-gaap_MachineryAndEquipmentGross
Property and equipment, gross 426us-gaap_PropertyPlantAndEquipmentGross 391us-gaap_PropertyPlantAndEquipmentGross
Less: accumulated depreciation (267)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (230)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Total property and equipment, net 159us-gaap_PropertyPlantAndEquipmentNet 161us-gaap_PropertyPlantAndEquipmentNet
Other assets    
Available-for-sale securities 78us-gaap_AvailableForSaleSecuritiesNoncurrent 0us-gaap_AvailableForSaleSecuritiesNoncurrent
Other 20us-gaap_OtherMarketableSecuritiesNoncurrent 58us-gaap_OtherMarketableSecuritiesNoncurrent
Total other assets 98us-gaap_OtherAssetsNoncurrent 58us-gaap_OtherAssetsNoncurrent
Other current liabilities    
Sales and value-added taxes 40us-gaap_SalesAndExciseTaxPayableCurrent 34us-gaap_SalesAndExciseTaxPayableCurrent
Other 61tdc_OtherOtherCurrentLiabilities 76tdc_OtherOtherCurrentLiabilities
Total other current liabilities 101us-gaap_OtherLiabilitiesCurrent 110us-gaap_OtherLiabilitiesCurrent
Deferred revenue    
Deferred revenue, current 370us-gaap_DeferredRevenueCurrent 390us-gaap_DeferredRevenueCurrent
Long-term deferred revenue 18us-gaap_DeferredRevenueNoncurrent 25us-gaap_DeferredRevenueNoncurrent
Total deferred revenue $ 388us-gaap_DeferredRevenue $ 415us-gaap_DeferredRevenue