Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 24, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	TEXAS INSTRUMENTS INCORPORATED
Entity Central Index Key	0000097476
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		933,619,937
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Entity Shell Company	false
Trading Symbol	TXN
Entity File Number	001-03761
Entity Tax Identification Number	750289970
Entity Address, Address Line One	12500 TI Boulevard
Entity Address, Postal Zip Code	75243
Entity Address, City or Town	Dallas
Entity Address, State or Province	Texas
City Area Code	214
Local Phone Number	214-479-3773