Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Revenues
Revenues	$ 3,078	$ 2,990	$ 9,233	$ 9,060
United States
Revenues
Revenues	2,143	2,134	6,242	6,305
Europe
Revenues
Revenues	305	315	1,131	1,052
Other international
Revenues
Revenues	630	541	1,860	1,703
Commercial
Revenues
Revenues	2,431	2,230	7,084	6,578
U.S. Government
Revenues
Revenues	647	760	2,149	2,482
Textron Aviation
Revenues
Revenues	1,167	1,181	3,491	3,207
Textron Aviation | United States
Revenues
Revenues	872	915	2,380	2,409
Textron Aviation | Europe
Revenues
Revenues	93	97	451	303
Textron Aviation | Other international
Revenues
Revenues	202	169	660	495
Textron Aviation | Commercial
Revenues
Revenues	1,134	1,149	3,408	3,122
Textron Aviation | U.S. Government
Revenues
Revenues	33	32	83	85
Textron Aviation | Aircraft
Revenues
Revenues	733	814	2,235	2,146
Textron Aviation | Aftermarket parts and services
Revenues
Revenues	434	367	1,256	1,061
Bell
Revenues
Revenues	754	769	2,275	2,506
Bell | United States
Revenues
Revenues	534	569	1,708	1,862
Bell | Europe
Revenues
Revenues	47	48	118	131
Bell | Other international
Revenues
Revenues	173	152	449	513
Bell | Commercial
Revenues
Revenues	362	278	875	894
Bell | U.S. Government
Revenues
Revenues	392	491	1,400	1,612
Bell | Military aircraft and support programs
Revenues
Revenues	376	488	1,375	1,637
Bell | Commercial helicopters, parts and services
Revenues
Revenues	378	281	900	869
Textron Systems
Revenues
Revenues	292	299	858	960
Textron Systems | United States
Revenues
Revenues	261	266	775	852
Textron Systems | Europe
Revenues
Revenues	10	10	28	29
Textron Systems | Other international
Revenues
Revenues	21	23	55	79
Textron Systems | Commercial
Revenues
Revenues	70	62	201	187
Textron Systems | U.S. Government
Revenues
Revenues	222	237	657	773
Industrial
Revenues
Revenues	849	730	2,558	2,349
Industrial | United States
Revenues
Revenues	470	377	1,362	1,161
Industrial | Europe
Revenues
Revenues	153	160	528	588
Industrial | Other international
Revenues
Revenues	226	193	668	600
Industrial | Commercial
Revenues
Revenues	849	730	2,549	2,337
Industrial | U.S. Government
Revenues
Revenues	0	0	9	12
Industrial | Fuel systems and functional components
Revenues
Revenues	436	382	1,335	1,319
Industrial | Specialized vehicles
Revenues
Revenues	413	348	1,223	1,030
Textron eAviation
Revenues
Revenues	5	0	10	0
Textron eAviation | United States
Revenues
Revenues	3	0	4	0
Textron eAviation | Europe
Revenues
Revenues	1	0	4	0
Textron eAviation | Other international
Revenues
Revenues	1	0	2	0
Textron eAviation | Commercial
Revenues
Revenues	5	0	10	0
Textron eAviation | U.S. Government
Revenues
Revenues	0	0	0	0
Finance
Revenues
Revenues	11	11	41	38
Finance | United States
Revenues
Revenues	3	7	13	21
Finance | Europe
Revenues
Revenues	1	0	2	1
Finance | Other international
Revenues
Revenues	7	4	26	16
Finance | Commercial
Revenues
Revenues	11	11	41	38
Finance | U.S. Government
Revenues
Revenues	$ 0	$ 0	$ 0	$ 0