Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2023	Apr. 02, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 3,024	$ 3,001
United States
Disaggregation of Revenue [Line Items]
Revenues	2,070	2,079
Europe
Disaggregation of Revenue [Line Items]
Revenues	305	346
Other international
Disaggregation of Revenue [Line Items]
Revenues	649	576
Commercial
Disaggregation of Revenue [Line Items]
Revenues	2,356	2,171
U.S. Government
Disaggregation of Revenue [Line Items]
Revenues	668	830
Textron Aviation
Disaggregation of Revenue [Line Items]
Revenues	1,149	1,040
Textron Aviation | United States
Disaggregation of Revenue [Line Items]
Revenues	836	732
Textron Aviation | Europe
Disaggregation of Revenue [Line Items]
Revenues	66	119
Textron Aviation | Other international
Disaggregation of Revenue [Line Items]
Revenues	247	189
Textron Aviation | Commercial
Disaggregation of Revenue [Line Items]
Revenues	1,107	1,021
Textron Aviation | U.S. Government
Disaggregation of Revenue [Line Items]
Revenues	42	19
Textron Aviation | Aircraft
Disaggregation of Revenue [Line Items]
Revenues	718	646
Textron Aviation | Aftermarket parts and services
Disaggregation of Revenue [Line Items]
Revenues	431	394
Bell
Disaggregation of Revenue [Line Items]
Revenues	621	834
Bell | United States
Disaggregation of Revenue [Line Items]
Revenues	460	670
Bell | Europe
Disaggregation of Revenue [Line Items]
Revenues	19	28
Bell | Other international
Disaggregation of Revenue [Line Items]
Revenues	142	136
Bell | Commercial
Disaggregation of Revenue [Line Items]
Revenues	232	234
Bell | U.S. Government
Disaggregation of Revenue [Line Items]
Revenues	389	600
Bell | Military aircraft and support programs
Disaggregation of Revenue [Line Items]
Revenues	385	597
Bell | Commercial helicopters, parts and services
Disaggregation of Revenue [Line Items]
Revenues	236	237
Textron Systems
Disaggregation of Revenue [Line Items]
Revenues	306	273
Textron Systems | United States
Disaggregation of Revenue [Line Items]
Revenues	275	246
Textron Systems | Europe
Disaggregation of Revenue [Line Items]
Revenues	14	8
Textron Systems | Other international
Disaggregation of Revenue [Line Items]
Revenues	17	19
Textron Systems | Commercial
Disaggregation of Revenue [Line Items]
Revenues	74	65
Textron Systems | U.S. Government
Disaggregation of Revenue [Line Items]
Revenues	232	208
Industrial
Disaggregation of Revenue [Line Items]
Revenues	932	838
Industrial | United States
Disaggregation of Revenue [Line Items]
Revenues	494	426
Industrial | Europe
Disaggregation of Revenue [Line Items]
Revenues	204	190
Industrial | Other international
Disaggregation of Revenue [Line Items]
Revenues	234	222
Industrial | Commercial
Disaggregation of Revenue [Line Items]
Revenues	927	835
Industrial | U.S. Government
Disaggregation of Revenue [Line Items]
Revenues	5	3
Industrial | Fuel systems and functional components
Disaggregation of Revenue [Line Items]
Revenues	488	464
Industrial | Specialized vehicles
Disaggregation of Revenue [Line Items]
Revenues	444	374
Textron eAviation
Disaggregation of Revenue [Line Items]
Revenues	4	0
Textron eAviation | United States
Disaggregation of Revenue [Line Items]
Revenues	1	0
Textron eAviation | Europe
Disaggregation of Revenue [Line Items]
Revenues	2	0
Textron eAviation | Other international
Disaggregation of Revenue [Line Items]
Revenues	1	0
Textron eAviation | Commercial
Disaggregation of Revenue [Line Items]
Revenues	4	0
Textron eAviation | U.S. Government
Disaggregation of Revenue [Line Items]
Revenues	0	0
Finance
Disaggregation of Revenue [Line Items]
Revenues	12	16
Finance | United States
Disaggregation of Revenue [Line Items]
Revenues	4	5
Finance | Europe
Disaggregation of Revenue [Line Items]
Revenues	0	1
Finance | Other international
Disaggregation of Revenue [Line Items]
Revenues	8	10
Finance | Commercial
Disaggregation of Revenue [Line Items]
Revenues	12	16
Finance | U.S. Government
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 0