Goodwill and Intangible Assets - Goodwill (Details) - Manufacturing group - USD ($) $ in Millions	12 Months Ended
Dec. 28, 2024	Dec. 30, 2023
Changes in the carrying amount of goodwill
Beginning Balance	$ 2,295	$ 2,283
Acquisitions	10
Foreign currency translation	(17)	12
Ending Balance	2,288	2,295
Textron Aviation
Changes in the carrying amount of goodwill
Beginning Balance	633	633
Acquisitions	0
Foreign currency translation	(1)	0
Ending Balance	632	633
Bell
Changes in the carrying amount of goodwill
Beginning Balance	37	37
Acquisitions	0
Foreign currency translation	0	0
Ending Balance	37	37
Textron Systems
Changes in the carrying amount of goodwill
Beginning Balance	1,010	1,010
Acquisitions	0
Foreign currency translation	0	0
Ending Balance	1,010	1,010
Industrial
Changes in the carrying amount of goodwill
Beginning Balance	470	465
Acquisitions	0
Foreign currency translation	(7)	5
Ending Balance	463	470
Textron eAviation
Changes in the carrying amount of goodwill
Beginning Balance	145	138
Acquisitions	10
Foreign currency translation	(9)	7
Ending Balance	$ 146	$ 145

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