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Stock-based compensation - Shares available for future grants and reserve for issuance (Details)
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Dec. 31, 2014
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Dec. 31, 2013
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Reserved for issuance (in shares) |
160,692,694us-gaap_CommonStockCapitalSharesReservedForFutureIssuance |
[1] |
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| Shares to be issued upon exercise of outstanding options and RSUs |
(75,461,686)txn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesToBeIssuedUpopnExerciseOfOutstandingOptionsAndRestrictedStockUnits |
[1] |
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| Available for future grants |
85,231,008txn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForFutureGrant |
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| Long-term incentive and director compensation plans |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Reserved for issuance (in shares) |
121,127,656us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= txn_LongTermIncentiveAndDirectorCompensationPlansMember |
[1] |
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| Shares to be issued upon exercise of outstanding options and RSUs |
(75,086,983)txn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesToBeIssuedUpopnExerciseOfOutstandingOptionsAndRestrictedStockUnits
/ us-gaap_PlanNameAxis
= txn_LongTermIncentiveAndDirectorCompensationPlansMember |
[1] |
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| Available for future grants |
46,040,673txn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForFutureGrant
/ us-gaap_PlanNameAxis
= txn_LongTermIncentiveAndDirectorCompensationPlansMember |
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| TI employees 2005 stock purchase plan |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Reserved for issuance (in shares) |
39,565,038us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= txn_A2005EmployeeStockPurchasePlanMember |
[1] |
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| Shares to be issued upon exercise of outstanding options and RSUs |
(374,703)txn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesToBeIssuedUpopnExerciseOfOutstandingOptionsAndRestrictedStockUnits
/ us-gaap_PlanNameAxis
= txn_A2005EmployeeStockPurchasePlanMember |
[1] |
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| Available for future grants |
39,190,335txn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForFutureGrant
/ us-gaap_PlanNameAxis
= txn_A2005EmployeeStockPurchasePlanMember |
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| Director |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Directors deferred compensation account (in shares) |
135,722us-gaap_DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember |
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129,264us-gaap_DeferredCompensationArrangementWithIndividualCommonStockReservedForFutureIssuance
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember |
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