Segment, Geographic and Other Revenue Information - Revenues By Geographic Area (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]	$ 13,298	$ 13,168	$ 39,670	$ 38,843
Percentage Change In Revenue		1.00%		2.00%
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues		$ 6,361	6,534	$ 18,861	19,516
Percentage Change In Revenue		(3.00%)		(3.00%)
Developed Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[2]	$ 2,231	2,163	$ 6,657	6,309
Percentage Change In Revenue	[2]	3.00%		6.00%
Developed Rest Of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[3]	$ 1,640	1,632	$ 4,795	4,797
Percentage Change In Revenue	[3]	1.00%
Emerging Markets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[4]	$ 3,066	$ 2,839	$ 9,358	$ 8,222
Percentage Change In Revenue	[4]	8.00%		14.00%

[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 $1.8 billion and $1.7 billion in the third quarter of 2018 and 2017, respectively, and $5.3 billion and $5.0 billion in the first nine months of 2018 and 2017, respectively.

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