Cover - USD ($) $ in Billions	12 Months Ended
	Jan. 01, 2022	Feb. 05, 2022	Jul. 03, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--01-01
Document Period End Date	Jan. 01, 2022
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 Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 15.4
Entity Common Stock, Shares Outstanding		216,682,177
Documents Incorporated by Reference	Part III of this Report incorporates information from certain portions of the registrant’s Definitive Proxy Statement for its Annual Meeting of Shareholders to be held on April 27, 2022.
Entity Central Index Key	0000217346
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false