Segment, Geographic and Other Revenue Information - Revenues By Geographic Area (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 29, 2020	Mar. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]	$ 12,028	$ 13,118
Percentage Change In Revenue		(8.00%)
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues		$ 5,651	6,175
Percentage Change In Revenue		(8.00%)
Developed Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[2]	$ 1,921	2,086
Percentage Change In Revenue	[2]	(8.00%)
Developed Rest Of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[3]	$ 1,456	1,535
Percentage Change In Revenue	[3]	(5.00%)
Emerging Markets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[4]	$ 3,001	$ 3,322
Percentage Change In Revenue	[4]	(10.00%)

[1] Amounts may not add due to rounding.

[2] Developed Europe region includes the following markets: Western Europe, Scandinavian countries and Finland. Revenues denominated in euros were $1.5 billion in the first quarter of 2020 and $1.7 billion in the first quarter of 2019.

[3] Developed Rest of World region includes the following markets: Japan, Canada, South Korea, Australia and New Zealand.

[4] Emerging Markets region includes, but is not limited to, the following markets: Asia (excluding Japan and South Korea), Latin America, Eastern Europe, Africa, the Middle East, Central Europe and Turkey.