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. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Sales by geographic area
Sales	$ 21,082	$ 20,729	$ 60,109	$ 61,312
Percentage Change In Sales By Geographic Area	1.70%		(2.00%)
United States
Sales by geographic area
Sales	$ 11,086	10,791	$ 31,324	31,323
Percentage Change In Sales By Geographic Area	2.70%		0.00%
Europe
Sales by geographic area
Sales	$ 4,819	4,461	$ 13,709	13,803
Percentage Change In Sales By Geographic Area	8.00%		(0.70%)
Western Hemisphere, excluding U.S.
Sales by geographic area
Sales	$ 1,296	1,488	$ 3,931	4,446
Percentage Change In Sales By Geographic Area	(12.90%)		(11.60%)
Asia-Pacific, Africa
Sales by geographic area
Sales	$ 3,881	$ 3,989	$ 11,145	$ 11,740
Percentage Change In Sales By Geographic Area	(2.70%)		(5.10%)