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Reorganization of Business - Reorganization of Businesses Accruals (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Restructuring Reserve [Roll Forward]
January 1, 2017			$ 102
Additional Charges			35
Adjustments			(5)
Amount Used			(77)
September 30, 2017	$ 55		55
Exit costs
Restructuring Reserve [Roll Forward]
January 1, 2017			7
Additional Charges	1		5	$ 5
Adjustments			0	$ (5)
Amount Used			(3)
September 30, 2017	9		9
Employee separation costs
Restructuring Reserve [Roll Forward]
January 1, 2017			95
Additional Charges	7	$ 8	30
Adjustments		$ (1)	(5)
Amount Used			(74)
September 30, 2017	$ 46		$ 46