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		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Sales by geographic area
Sales	$ 18,336	$ 20,562	$ 39,027	$ 40,583
Percentage Change In Sales By Geographic Area	(10.80%)		(3.80%)
United States
Sales by geographic area
Sales	$ 9,539	10,403	$ 20,238	20,532
Percentage Change In Sales By Geographic Area	(8.30%)		(1.40%)
Europe
Sales by geographic area
Sales	$ 4,063	4,733	$ 8,890	9,342
Percentage Change In Sales By Geographic Area	(14.20%)		(4.80%)
Western Hemisphere, excluding U.S.
Sales by geographic area
Sales	$ 1,133	1,455	$ 2,635	2,958
Percentage Change In Sales By Geographic Area	(22.10%)		(10.90%)
Asia-Pacific, Africa
Sales by geographic area
Sales	$ 3,601	$ 3,971	$ 7,264	$ 7,751
Percentage Change In Sales By Geographic Area	(9.30%)		(6.30%)