Segment, Geographic and Other Revenue Information - Revenues By Geographic Area (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]	$ 11,853	$ 12,773	$ 22,717	$ 24,126
Percentage change in revenue		(7.00%)		(6.00%)
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues		$ 4,994	4,906	$ 9,428	9,181
Percentage change in revenue		2.00%		3.00%
Developed Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[2]	$ 2,380	3,008	$ 4,691	5,803
Percentage change in revenue	[2]	(21.00%)		(19.00%)
Developed Rest Of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[3]	$ 1,558	1,861	$ 3,050	3,589
Percentage change in revenue	[3]	(16.00%)		(15.00%)
Emerging Markets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[4]	$ 2,921	$ 2,998	$ 5,548	$ 5,553
Percentage change in revenue	[4]	(3.00%)		0.00%

[1] Amounts may not add due to rounding.

[2] Developed Europe region includes the following markets: Western Europe, Finland and the Scandinavian countries. Revenues denominated in euros were $1.8 billion and $2.3 billion in the second quarter of 2015 and 2014, respectively, and $3.6 billion and $4.5 billion in the first six months of 2015 and 2014, respectively.

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

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