Segment, Geographic and Other Revenue Information - Revenues By Geographic Area - Footnotes (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 29, 2015		Mar. 30, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 10,864	[1]	$ 11,353	[1]
Developed Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,312		2,795
Euro Member Countries, Euro | Developed Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,800		$ 2,200

[1] Amounts may not add due to rounding.