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Description of business, including segment and geographic area information (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Reportable_Segments
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Information [Line Items]                      
Number of reportable segments                 2us-gaap_NumberOfReportableSegments    
Revenue $ 3,269us-gaap_SalesRevenueNet $ 3,501us-gaap_SalesRevenueNet $ 3,292us-gaap_SalesRevenueNet $ 2,983us-gaap_SalesRevenueNet $ 3,028us-gaap_SalesRevenueNet $ 3,244us-gaap_SalesRevenueNet $ 3,047us-gaap_SalesRevenueNet $ 2,885us-gaap_SalesRevenueNet $ 13,045us-gaap_SalesRevenueNet $ 12,205us-gaap_SalesRevenueNet $ 12,825us-gaap_SalesRevenueNet
Operating profit 1,100us-gaap_OperatingIncomeLoss 1,175us-gaap_OperatingIncomeLoss 982us-gaap_OperatingIncomeLoss 690us-gaap_OperatingIncomeLoss 687us-gaap_OperatingIncomeLoss 844us-gaap_OperatingIncomeLoss 906us-gaap_OperatingIncomeLoss 395us-gaap_OperatingIncomeLoss 3,947us-gaap_OperatingIncomeLoss 2,832us-gaap_OperatingIncomeLoss 1,973us-gaap_OperatingIncomeLoss
Property, plant and equipment, net 2,840us-gaap_PropertyPlantAndEquipmentNet       3,399us-gaap_PropertyPlantAndEquipmentNet       2,840us-gaap_PropertyPlantAndEquipmentNet 3,399us-gaap_PropertyPlantAndEquipmentNet 3,912us-gaap_PropertyPlantAndEquipmentNet
Analog                      
Segment Reporting Information [Line Items]                      
Revenue                 8,104us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= txn_ReportingSegmentAnalogMember
7,194us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= txn_ReportingSegmentAnalogMember
6,998us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= txn_ReportingSegmentAnalogMember
Operating profit                 2,786us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= txn_ReportingSegmentAnalogMember
1,859us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= txn_ReportingSegmentAnalogMember
1,650us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= txn_ReportingSegmentAnalogMember
Embedded Processing                      
Segment Reporting Information [Line Items]                      
Revenue                 2,740us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= txn_ReportingSegmentEmbeddedProcessingMember
2,450us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= txn_ReportingSegmentEmbeddedProcessingMember
2,257us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= txn_ReportingSegmentEmbeddedProcessingMember
Operating profit                 384us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= txn_ReportingSegmentEmbeddedProcessingMember
185us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= txn_ReportingSegmentEmbeddedProcessingMember
158us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= txn_ReportingSegmentEmbeddedProcessingMember
Other                      
Segment Reporting Information [Line Items]                      
Revenue                 2,201us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
2,561us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
3,570us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Operating profit                 777us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
788us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
165us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
United States                      
Segment Reporting Information [Line Items]                      
Revenue                 1,625us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_US
1,666us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_US
1,596us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_US
Property, plant and equipment, net 1,436us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
      1,765us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
      1,436us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
1,765us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
1,931us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
Asia                      
Segment Reporting Information [Line Items]                      
Revenue                 7,915us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember
[1] 7,370us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember
[1] 7,808us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember
[1]
Property, plant and equipment, net 1,096us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember
      1,277us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember
      1,096us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember
1,277us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember
1,547us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaMember
Europe                      
Segment Reporting Information [Line Items]                      
Revenue                 2,293us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
1,926us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
1,861us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
Property, plant and equipment, net 162us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
      196us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
      162us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
196us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
241us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
Japan                      
Segment Reporting Information [Line Items]                      
Revenue                 1,032us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_JP
1,072us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_JP
1,357us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_JP
Property, plant and equipment, net 124us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_JP
      144us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_JP
      124us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_JP
144us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_JP
174us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_JP
Rest of world                      
Segment Reporting Information [Line Items]                      
Revenue                 180us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= txn_SegmentGeographicalGroupsOfCountriesGroupThreeMember
171us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= txn_SegmentGeographicalGroupsOfCountriesGroupThreeMember
203us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= txn_SegmentGeographicalGroupsOfCountriesGroupThreeMember
Property, plant and equipment, net 22us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= txn_SegmentGeographicalGroupsOfCountriesGroupThreeMember
      17us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= txn_SegmentGeographicalGroupsOfCountriesGroupThreeMember
      22us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= txn_SegmentGeographicalGroupsOfCountriesGroupThreeMember
17us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= txn_SegmentGeographicalGroupsOfCountriesGroupThreeMember
19us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= txn_SegmentGeographicalGroupsOfCountriesGroupThreeMember
China (including Hong Kong)                      
Segment Reporting Information [Line Items]                      
Revenue                 $ 5,700us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_CN
$ 5,200us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_CN
$ 5,400us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_CN
[1] Revenue from products shipped into China, including Hong Kong, was $5.7 billion in 2014, $5.2 billion in 2013 and $5.4 billion in 2012.