Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021
Revenues
Revenues	$ 3,154	$ 3,191	$ 6,155	$ 6,070
United States
Revenues
Revenues	2,020	2,271	4,099	4,171
Europe
Revenues
Revenues	480	371	826	737
Other international
Revenues
Revenues	654	549	1,230	1,162
Commercial
Revenues
Revenues	2,432	2,343	4,557	4,348
U.S. Government
Revenues
Revenues	722	848	1,598	1,722
Textron Aviation
Revenues
Revenues	1,284	1,161	2,324	2,026
Textron Aviation | United States
Revenues
Revenues	776	885	1,508	1,494
Textron Aviation | Europe
Revenues
Revenues	239	122	358	206
Textron Aviation | Other international
Revenues
Revenues	269	154	458	326
Textron Aviation | Commercial
Revenues
Revenues	1,253	1,127	2,274	1,973
Textron Aviation | U.S. Government
Revenues
Revenues	31	34	50	53
Textron Aviation | Aircraft
Revenues
Revenues	856	797	1,502	1,332
Textron Aviation | Aftermarket parts and services
Revenues
Revenues	428	364	822	694
Bell
Revenues
Revenues	687	891	1,521	1,737
Bell | United States
Revenues
Revenues	504	677	1,174	1,293
Bell | Europe
Revenues
Revenues	43	47	71	83
Bell | Other international
Revenues
Revenues	140	167	276	361
Bell | Commercial
Revenues
Revenues	279	350	513	616
Bell | U.S. Government
Revenues
Revenues	408	541	1,008	1,121
Bell | Military aircraft and support programs
Revenues
Revenues	402	572	999	1,149
Bell | Commercial helicopters, parts and services
Revenues
Revenues	285	319	522	588
Textron Systems
Revenues
Revenues	293	333	566	661
Textron Systems | United States
Revenues
Revenues	268	297	514	586
Textron Systems | Europe
Revenues
Revenues	10	9	18	19
Textron Systems | Other international
Revenues
Revenues	15	27	34	56
Textron Systems | Commercial
Revenues
Revenues	19	67	38	125
Textron Systems | U.S. Government
Revenues
Revenues	274	266	528	536
Industrial
Revenues
Revenues	871	794	1,709	1,619
Industrial | United States
Revenues
Revenues	466	406	892	784
Industrial | Europe
Revenues
Revenues	185	192	375	428
Industrial | Other international
Revenues
Revenues	220	196	442	407
Industrial | Commercial
Revenues
Revenues	862	787	1,697	1,607
Industrial | U.S. Government
Revenues
Revenues	9	7	12	12
Industrial | Fuel systems and functional components
Revenues
Revenues	435	440	899	937
Industrial | Specialized vehicles
Revenues
Revenues	436	354	810	682
Textron eAviation
Revenues
Revenues	5	0	5	0
Textron eAviation | United States
Revenues
Revenues	1	0	1	0
Textron eAviation | Europe
Revenues
Revenues	3	0	3	0
Textron eAviation | Other international
Revenues
Revenues	1	0	1	0
Textron eAviation | Commercial
Revenues
Revenues	5	0	5	0
Textron eAviation | U.S. Government
Revenues
Revenues	0	0	0	0
Finance
Revenues
Revenues	14	12	30	27
Finance | United States
Revenues
Revenues	5	6	10	14
Finance | Europe
Revenues
Revenues	0	1	1	1
Finance | Other international
Revenues
Revenues	9	5	19	12
Finance | Commercial
Revenues
Revenues	14	12	30	27
Finance | U.S. Government
Revenues
Revenues	$ 0	$ 0	$ 0	$ 0