Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Jan. 04, 2020	Feb. 08, 2020	Jun. 29, 2019
Document and Entity Information
Document Type	10-K
Document Annual Report	true
Document Period End Date	Jan. 04, 2020
Document Transition Report	false
Entity File Number	1-5480
Entity Registrant Name	Textron Inc
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	05-0315468
Entity Address, Address Line One	40 Westminster Street
Entity Address, City or Town	Providence
Entity Address, State or Province	RI
Entity Address, Postal Zip Code	02903
City Area Code	401
Local Phone Number	421-2800
Title of 12(b) Security	Common Stock — par value $0.125
Trading Symbol	TXT
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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 Public Float			$ 12.2
Entity Common Stock, Shares Outstanding		228,049,518
Entity Central Index Key	0000217346
Current Fiscal Year End Date	--01-04
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false