Segment and Geographic Data - Assets, Capital Expenditures and Depreciation and Amortization by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Jan. 04, 2020
Other Information by Segment
Assets	$ 15,827	$ 15,443
Capital Expenditures	375	317	$ 339
Depreciation and Amortization	390	391	416
Manufacturing group
Other Information by Segment
Assets	14,960	14,505
Capital Expenditures	375	317	339
Depreciation and Amortization	380	386	410
Corporate
Other Information by Segment
Assets	2,679	2,587
Capital Expenditures	6	2	1
Depreciation and Amortization	10	12	10
Textron Aviation | Operating Segment | Manufacturing group
Other Information by Segment
Assets	4,390	4,380
Capital Expenditures	115	94	122
Depreciation and Amortization	139	138	137
Bell | Operating Segment | Manufacturing group
Other Information by Segment
Assets	3,382	2,984
Capital Expenditures	92	117	81
Depreciation and Amortization	87	91	107
Textron Systems | Operating Segment | Manufacturing group
Other Information by Segment
Assets	1,980	2,054
Capital Expenditures	80	42	38
Depreciation and Amortization	45	43	48
Industrial | Operating Segment | Manufacturing group
Other Information by Segment
Assets	2,529	2,500
Capital Expenditures	82	62	97
Depreciation and Amortization	99	102	108
Finance | Operating Segment
Other Information by Segment
Assets	867	938
Capital Expenditures	0	0	0
Depreciation and Amortization	$ 10	$ 5	$ 6