Cover Page - shares	6 Months Ended
	Jun. 30, 2020	Jul. 14, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2020
Document Transition Report	false
Entity File Number	001-03761
Entity Registrant Name	TEXAS INSTRUMENTS INCORPORATED
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	75-0289970
Entity Address, Address Line One	12500 TI Boulevard
Entity Address, City or Town	Dallas
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75243
City Area Code	214
Local Phone Number	479-3773
Title of 12(b) Security	Common Stock, par value $1.00
Trading Symbol	TXN
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		915,943,779
Entity Central Index Key	0000097476
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false