Cover - shares	9 Months Ended
	Oct. 02, 2021	Oct. 15, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Oct. 02, 2021
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, $0.125 par value
Trading Symbol	TXT
Security Exchange Name	NYSE
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		220,425,217
Entity Central Index Key	0000217346
Current Fiscal Year End Date	--01-01
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false