Document And Entity Information	12 Months Ended
	Dec. 31, 2012
Document And Entity Information [Abstract]
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
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Document Type	8-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2012