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Commitments and contingencies (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]      
Rental and lease expense incurred $ 113us-gaap_LeaseAndRentalExpense $ 120us-gaap_LeaseAndRentalExpense $ 124us-gaap_LeaseAndRentalExpense
Standard product warranty description three years of coverage; an obligation to repair, replace or refund; and a maximum payment obligation tied to the price paid for our products    
Standard product warranty coverage (in years) 3 years    
Operating Leases      
2015 87us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent    
2016 66us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears    
2017 45us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears    
2018 33us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears    
2019 21us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears    
Thereafter 80us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter    
Purchase Commitments      
2015 96us-gaap_RecordedUnconditionalPurchaseObligationDueWithinOneYear    
2016 52us-gaap_RecordedUnconditionalPurchaseObligationDueInSecondYear    
2017 35us-gaap_RecordedUnconditionalPurchaseObligationDueInThirdYear    
2018 14us-gaap_RecordedUnconditionalPurchaseObligationDueInFourthYear    
2019 10us-gaap_RecordedUnconditionalPurchaseObligationDueInFifthYear    
Thereafter 2us-gaap_RecordedUnconditionalPurchaseObligationDueAfterFifthYear    
Discontinued operation - indemnification obligation potential exposure 200txn_ExposureFromIndemnitiesGrantedToThirdPartyManagementEstimation    
Capitalized Software Licenses      
Capitalized Software Licenses      
2015 39us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
   
2016 27us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
   
2017 0us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
   
2018 0us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
   
2019 0us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
   
Thereafter $ 0us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember