Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Revenues
Revenues	$ 12,869	$ 12,382	$ 11,651
United States
Revenues
Revenues	8,702	8,572	7,943
Europe
Revenues
Revenues	1,468	1,369	1,336
Other international
Revenues
Revenues	2,699	2,441	2,372
Commercial
Revenues
Revenues	10,035	9,182	8,202
U.S. Government
Revenues
Revenues	2,834	3,200	3,449
Textron Aviation
Revenues
Revenues	5,073	4,566	3,974
Textron Aviation | United States
Revenues
Revenues	3,520	3,424	2,825
Textron Aviation | Europe
Revenues
Revenues	579	396	356
Textron Aviation | Other international
Revenues
Revenues	974	746	793
Textron Aviation | Commercial
Revenues
Revenues	4,959	4,435	3,826
Textron Aviation | U.S. Government
Revenues
Revenues	114	131	148
Textron Aviation | Aircraft
Revenues
Revenues	3,387	3,116	2,714
Textron Aviation | Aftermarket parts and services
Revenues
Revenues	1,686	1,450	1,260
Bell
Revenues
Revenues	3,091	3,364	3,309
Bell | United States
Revenues
Revenues	2,242	2,425	2,564
Bell | Europe
Revenues
Revenues	139	171	148
Bell | Other international
Revenues
Revenues	710	768	597
Bell | Commercial
Revenues
Revenues	1,284	1,328	1,079
Bell | U.S. Government
Revenues
Revenues	1,807	2,036	2,230
Bell | Military aircraft and support programs
Revenues
Revenues	1,740	2,073	2,213
Bell | Commercial helicopters, parts and services
Revenues
Revenues	1,351	1,291	1,096
Textron Systems
Revenues
Revenues	1,172	1,273	1,313
Textron Systems | United States
Revenues
Revenues	1,054	1,126	1,129
Textron Systems | Europe
Revenues
Revenues	42	44	44
Textron Systems | Other international
Revenues
Revenues	76	103	140
Textron Systems | Commercial
Revenues
Revenues	274	257	249
Textron Systems | U.S. Government
Revenues
Revenues	898	1,016	1,064
Industrial
Revenues
Revenues	3,465	3,130	3,000
Industrial | United States
Revenues
Revenues	1,862	1,570	1,398
Industrial | Europe
Revenues
Revenues	699	757	786
Industrial | Other international
Revenues
Revenues	904	803	816
Industrial | Commercial
Revenues
Revenues	3,450	3,113	2,993
Industrial | U.S. Government
Revenues
Revenues	15	17	7
Industrial | Fuel systems and functional components
Revenues
Revenues	1,771	1,735	1,751
Industrial | Specialized vehicles
Revenues
Revenues	1,694	1,395	1,249
Textron eAviation
Revenues
Revenues	16	0	0
Textron eAviation | United States
Revenues
Revenues	7	0	0
Textron eAviation | Europe
Revenues
Revenues	6	0	0
Textron eAviation | Other international
Revenues
Revenues	3	0	0
Textron eAviation | Commercial
Revenues
Revenues	16	0	0
Textron eAviation | U.S. Government
Revenues
Revenues	0	0	0
Finance
Revenues
Revenues	52	49	55
Finance | United States
Revenues
Revenues	17	27	27
Finance | Europe
Revenues
Revenues	3	1	2
Finance | Other international
Revenues
Revenues	32	21	26
Finance | Commercial
Revenues
Revenues	52	49	55
Finance | U.S. Government
Revenues
Revenues	$ 0	$ 0	$ 0