Segments of Business and Geographic Areas - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Sales by geographic area
Sales	$ 20,729	$ 20,348	$ 61,312	$ 61,187
Percentage Change In Sales By Geographic Area	1.90%		0.20%
United States
Sales by geographic area
Sales	$ 10,791	10,664	$ 31,323	31,255
Percentage Change In Sales By Geographic Area	1.20%		0.20%
Europe
Sales by geographic area
Sales	$ 4,461	4,416	$ 13,803	14,023
Percentage Change In Sales By Geographic Area	1.00%		(1.60%)
Western Hemisphere, excluding U.S.
Sales by geographic area
Sales	$ 1,488	1,550	$ 4,446	4,657
Percentage Change In Sales By Geographic Area	(4.00%)		(4.50%)
Asia-Pacific, Africa
Sales by geographic area
Sales	$ 3,989	$ 3,718	$ 11,740	$ 11,252
Percentage Change In Sales By Geographic Area	7.30%		4.30%