Segment, Geographic and Other Revenue Information - Revenues By Geographic Area (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues		$ 12,131	$ 12,680	$ 35,961	$ 39,062
Percentage Change In Revenue		(4.00%)		(8.00%)
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues		$ 5,716	5,850	$ 16,770	18,360
Percentage Change In Revenue		(2.00%)		(9.00%)
Developed Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]	$ 2,087	2,135	$ 6,095	6,450
Percentage Change In Revenue	[1]	(2.00%)		(5.00%)
Developed Rest Of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues		$ 1,634	1,585	$ 4,642	4,758
Percentage Change In Revenue		3.00%		(2.00%)
Emerging Markets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues		$ 2,694	$ 3,110	$ 8,453	$ 9,493
Percentage Change In Revenue		(13.00%)		(11.00%)

[1] Revenues denominated in euros were $1.7 billion in the third quarter of 2020 and $1.7 billion in the third quarter of 2019, and were $4.9 billion in the first nine months of 2020 and $5.2 billion in the first nine months of 2019.