Segment Financial Information - Assets, Capital Expenditures and Depreciation and Amortization by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Other Information by Segment
Assets	$ 16,838	$ 16,856
Capital Expenditures	364	402	$ 354
Depreciation and Amortization	382	395	397
Manufacturing group
Other Information by Segment
Assets	16,158	16,195
Depreciation and Amortization	382	395	396
Corporate
Other Information by Segment
Assets	3,842	3,969
Capital Expenditures	0	2	0
Depreciation and Amortization	7	9	10
Textron Aviation | Operating Segment | Manufacturing group
Other Information by Segment
Assets	4,624	4,542
Capital Expenditures	136	138	138
Depreciation and Amortization	164	160	152
Bell | Operating Segment | Manufacturing group
Other Information by Segment
Assets	2,992	2,869
Capital Expenditures	122	119	80
Depreciation and Amortization	86	89	90
Textron Systems | Operating Segment | Manufacturing group
Other Information by Segment
Assets	2,036	2,008
Capital Expenditures	40	48	57
Depreciation and Amortization	48	41	49
Industrial | Operating Segment | Manufacturing group
Other Information by Segment
Assets	2,378	2,520
Capital Expenditures	62	91	78
Depreciation and Amortization	70	89	93
Textron eAviation | Operating Segment | Manufacturing group
Other Information by Segment
Assets	286	287
Capital Expenditures	4	4	1
Depreciation and Amortization	7	7	2
Finance | Operating Segment
Other Information by Segment
Assets	680	661
Capital Expenditures	0	0	0
Depreciation and Amortization	$ 0	$ 0	$ 1