Segment and Geographic Data - Assets, Capital Expenditures and Depreciation and Amortization by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Jan. 01, 2022
Other Information by Segment
Assets	$ 16,856	$ 16,293
Capital Expenditures	402	354	$ 375
Depreciation and Amortization	395	397	390
Manufacturing group
Other Information by Segment
Assets	16,195	15,629
Depreciation and Amortization	395	396	380
Corporate
Other Information by Segment
Assets	3,969	3,454
Capital Expenditures	2	0	6
Depreciation and Amortization	9	10	10
Textron Aviation | Operating Segment | Manufacturing group
Other Information by Segment
Assets	4,542	4,496
Capital Expenditures	138	138	115
Depreciation and Amortization	160	152	139
Bell | Operating Segment | Manufacturing group
Other Information by Segment
Assets	2,869	2,857
Capital Expenditures	119	80	92
Depreciation and Amortization	89	90	87
Textron Systems | Operating Segment | Manufacturing group
Other Information by Segment
Assets	2,008	1,989
Capital Expenditures	48	57	80
Depreciation and Amortization	41	49	45
Industrial | Operating Segment | Manufacturing group
Other Information by Segment
Assets	2,520	2,555
Capital Expenditures	91	78	82
Depreciation and Amortization	89	93	99
Textron eAviation | Operating Segment | Manufacturing group
Other Information by Segment
Assets	287	278
Capital Expenditures	4	1	0
Depreciation and Amortization	7	2	0
Finance | Operating Segment
Other Information by Segment
Assets	661	664
Capital Expenditures	0	0	0
Depreciation and Amortization	$ 0	$ 1	$ 10