Segment Information - Reportable Segments and Reconciliation to Consolidated Net Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Disclosure [Line Items]
Net sales	$ 19,340		$ 15,704		$ 39,081		$ 31,774
Segment operating expenses	19,355		15,625		38,949		31,514
Income (loss) from operations	(15)		79		132		260
Stock-based compensation	(391)		(298)		(711)		(526)		(1,318)	(978)
Other operating income (expense), net	(28)		(32)		(63)		(64)
Total non-operating income (expense)	(12)		(62)		(39)		(162)
Benefit (provision) for income taxes	(94)		(13)		(167)		6
Equity-method investment activity, net of tax	(5)		(11)		56		(29)
Net income (loss)	(126)		(7)		(18)		75		181	(101)
Operating Segments
Segment Reporting Disclosure [Line Items]
Net sales	19,340		15,704		39,081		31,774
Segment operating expenses	18,936	[1]	15,295	[1]	38,175	[1]	30,924	[1]
Income (loss) from operations	404		409		906		850
Operating Segments | North America
Segment Reporting Disclosure [Line Items]
Net sales	11,998		9,495		23,856		18,886
Segment operating expenses	11,560	[1]	9,086	[1]	22,856	[1]	18,020	[1]
Income (loss) from operations	438		409		1,000		866
Operating Segments | International
Segment Reporting Disclosure [Line Items]
Net sales	7,342		6,209		15,225		12,888
Segment operating expenses	7,376	[1]	6,209	[1]	15,319	[1]	12,904	[1]
Income (loss) from operations	$ (34)		$ 0		$ (94)		$ (16)

[1] Represents operating expenses, excluding stock-based compensation and “Other operating expense (income), net,” which are not allocated to segments.