Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Jan. 04, 2020
Revenues
Revenues	$ 12,382	$ 11,651	$ 13,630
United States
Revenues
Revenues	8,572	7,943	8,963
Europe
Revenues
Revenues	1,369	1,336	1,986
Asia and Australia
Revenues
Revenues	1,133	1,106	1,070
Other international
Revenues
Revenues	1,308	1,266	1,611
Commercial
Revenues
Revenues	9,182	8,202	10,394
U.S. Government
Revenues
Revenues	3,200	3,449	3,236
Textron Aviation
Revenues
Revenues	4,566	3,974	5,187
Textron Aviation | United States
Revenues
Revenues	3,424	2,825	3,708
Textron Aviation | Europe
Revenues
Revenues	396	356	678
Textron Aviation | Asia and Australia
Revenues
Revenues	298	379	244
Textron Aviation | Other international
Revenues
Revenues	448	414	557
Textron Aviation | Commercial
Revenues
Revenues	4,435	3,826	4,956
Textron Aviation | U.S. Government
Revenues
Revenues	131	148	231
Textron Aviation | Aircraft
Revenues
Revenues	3,116	2,714	3,592
Textron Aviation | Aftermarket parts and services
Revenues
Revenues	1,450	1,260	1,595
Bell
Revenues
Revenues	3,364	3,309	3,254
Bell | United States
Revenues
Revenues	2,425	2,564	2,440
Bell | Europe
Revenues
Revenues	171	148	142
Bell | Asia and Australia
Revenues
Revenues	390	330	348
Bell | Other international
Revenues
Revenues	378	267	324
Bell | Commercial
Revenues
Revenues	1,328	1,079	1,238
Bell | U.S. Government
Revenues
Revenues	2,036	2,230	2,016
Bell | Military aircraft and support programs
Revenues
Revenues	2,073	2,213	1,988
Bell | Commercial helicopters, parts and services
Revenues
Revenues	1,291	1,096	1,266
Textron Systems
Revenues
Revenues	1,273	1,313	1,325
Textron Systems | United States
Revenues
Revenues	1,126	1,129	1,083
Textron Systems | Europe
Revenues
Revenues	44	44	73
Textron Systems | Asia and Australia
Revenues
Revenues	62	67	103
Textron Systems | Other international
Revenues
Revenues	41	73	66
Textron Systems | Commercial
Revenues
Revenues	257	249	359
Textron Systems | U.S. Government
Revenues
Revenues	1,016	1,064	966
Industrial
Revenues
Revenues	3,130	3,000	3,798
Industrial | United States
Revenues
Revenues	1,570	1,398	1,698
Industrial | Europe
Revenues
Revenues	757	786	1,091
Industrial | Asia and Australia
Revenues
Revenues	378	328	374
Industrial | Other international
Revenues
Revenues	425	488	635
Industrial | Commercial
Revenues
Revenues	3,113	2,993	3,775
Industrial | U.S. Government
Revenues
Revenues	17	7	23
Industrial | Fuel systems and functional components
Revenues
Revenues	1,735	1,751	2,237
Industrial | Specialized vehicles
Revenues
Revenues	1,395	1,249	1,561
Finance
Revenues
Revenues	49	55	66
Finance | United States
Revenues
Revenues	27	27	34
Finance | Europe
Revenues
Revenues	1	2	2
Finance | Asia and Australia
Revenues
Revenues	5	2	1
Finance | Other international
Revenues
Revenues	16	24	29
Finance | Commercial
Revenues
Revenues	49	55	66
Finance | U.S. Government
Revenues
Revenues	$ 0	$ 0	$ 0