Document And Entity Information	3 Months Ended
	Mar. 31, 2013
Entity Information [Line Items]
Entity Registrant Name	TEXAS INSTRUMENTS INC
Entity Central Index Key	0000097476
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	1,109,154,388
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2013