Segment and Geographic Data - Revenue by Segments And Reconciliation Of Segment Profit (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Jan. 01, 2022
Revenues
Revenues	$ 13,683	$ 12,869	$ 12,382
Reconciliation of segment profit to income from continuing operations before income taxes
Interest expense, net for Manufacturing group	(77)	(107)	(142)
Intangible asset amortization	(39)	(52)	(51)
Special charges	(126)	0	(25)
Non-service components of pension and postretirement income, net	237	240	159
Gain on business disposition	0	0	17
Income from continuing operations before income taxes	1,087	1,016	873
Operating Segment
Revenues
Revenues	13,683	12,869	12,382
Segment Profit
Segment Profit (Loss)	1,327	1,136	1,064
Reconciling Items
Reconciliation of segment profit to income from continuing operations before income taxes
Corporate expenses and other, net	(143)	(143)	(150)
LIFO inventory provision	(107)	(71)	(17)
Intangible asset amortization	(39)	(52)	(51)
Special charges	(126)	0	(25)
Non-service components of pension and postretirement income, net	237	240	159
Gain on business disposition	0	0	17
Textron Aviation
Revenues
Revenues	5,373	5,073	4,566
Bell
Revenues
Revenues	3,147	3,091	3,364
Textron Systems
Revenues
Revenues	1,235	1,172	1,273
Industrial
Revenues
Revenues	3,841	3,465	3,130
Textron eAviation
Revenues
Revenues	32	16	0
Finance
Revenues
Revenues	55	52	49
Manufacturing group | Reconciling Items
Reconciliation of segment profit to income from continuing operations before income taxes
Interest expense, net for Manufacturing group	(62)	(94)	(124)
Manufacturing group | Textron Aviation | Operating Segment
Revenues
Revenues	5,373	5,073	4,566
Segment Profit
Segment Profit (Loss)	649	560	349
Manufacturing group | Bell | Operating Segment
Revenues
Revenues	3,147	3,091	3,364
Segment Profit
Segment Profit (Loss)	320	282	399
Manufacturing group | Textron Systems | Operating Segment
Revenues
Revenues	1,235	1,172	1,273
Segment Profit
Segment Profit (Loss)	147	132	178
Manufacturing group | Industrial | Operating Segment
Revenues
Revenues	3,841	3,465	3,130
Segment Profit
Segment Profit (Loss)	228	155	120
Manufacturing group | Textron eAviation | Operating Segment
Revenues
Revenues	32	16	0
Segment Profit
Segment Profit (Loss)	(63)	(24)	0
Finance group
Revenues
Revenues	55	52	49
Finance group | Finance | Operating Segment
Revenues
Revenues	55	52	49
Segment Profit
Segment Profit (Loss)	$ 46	$ 31	$ 18