Special Charges - Special Charges by Segment (Details) - USD ($)	12 Months Ended			21 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021	Jan. 01, 2022
Restructuring Cost and Reserve [Line Items]
Asset Impairments		$ 0	$ 39,000,000
Special charges	$ 0	25,000,000	147,000,000
Operating Segment | Textron Aviation
Restructuring Cost and Reserve [Line Items]
Asset Impairments			32,000,000
Special charges			65,000,000
Operating Segment | Industrial
Restructuring Cost and Reserve [Line Items]
Asset Impairments		0	7,000,000
Special charges		25,000,000	41,000,000
Operating Segment | Textron Systems
Restructuring Cost and Reserve [Line Items]
Asset Impairments			0
Special charges			37,000,000
Corporate
Restructuring Cost and Reserve [Line Items]
Asset Impairments			0
Special charges			4,000,000
COVID-19 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Asset Impairments		12,000,000	22,000,000	$ 34,000,000
Special charges		25,000,000	108,000,000	133,000,000
COVID-19 Restructuring Plan | Severance Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		4,000,000	73,000,000
COVID-19 Restructuring Plan | Contract Terminations and Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges		9,000,000	13,000,000
COVID-19 Restructuring Plan | Operating Segment | Textron Aviation
Restructuring Cost and Reserve [Line Items]
Asset Impairments			2,000,000
Special charges			33,000,000	33,000,000
COVID-19 Restructuring Plan | Operating Segment | Textron Aviation | Severance Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			31,000,000
COVID-19 Restructuring Plan | Operating Segment | Textron Aviation | Contract Terminations and Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges			0
COVID-19 Restructuring Plan | Operating Segment | Industrial
Restructuring Cost and Reserve [Line Items]
Asset Impairments		12,000,000	6,000,000
Special charges		25,000,000	34,000,000	59,000,000
COVID-19 Restructuring Plan | Operating Segment | Industrial | Severance Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		4,000,000	27,000,000
COVID-19 Restructuring Plan | Operating Segment | Industrial | Contract Terminations and Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 9,000,000	1,000,000
COVID-19 Restructuring Plan | Operating Segment | Textron Systems
Restructuring Cost and Reserve [Line Items]
Asset Impairments			14,000,000
Special charges			37,000,000	37,000,000
COVID-19 Restructuring Plan | Operating Segment | Textron Systems | Severance Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			11,000,000
COVID-19 Restructuring Plan | Operating Segment | Textron Systems | Contract Terminations and Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges			12,000,000
COVID-19 Restructuring Plan | Corporate
Restructuring Cost and Reserve [Line Items]
Asset Impairments			0
Special charges			4,000,000	$ 4,000,000
COVID-19 Restructuring Plan | Corporate | Severance Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges			4,000,000
COVID-19 Restructuring Plan | Corporate | Contract Terminations and Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 0