Special Charges - 2014 special charges (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Dec. 31, 2016	Jan. 03, 2015
Special Charges
Special charges	$ 8	$ 115	$ 123	$ 52
Textron Aviation
Special Charges
Special charges			$ 35
2014 Beechcraft Acquisition | Textron Aviation
Special Charges
Special charges				41
Transaction costs				$ 11