Reportable Segments and Reconciliation to Consolidated Net Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2010		Sep. 30, 2010		Jun. 30, 2010		Mar. 31, 2010		Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Segment Reporting Information [Line Items]
Net Sales	$ 17,431	[1]	$ 10,876	[1]	$ 9,913	[1]	$ 9,857	[1]	$ 12,948	[1]	$ 7,560	[1]	$ 6,566	[1]	$ 7,131	[1]	$ 48,077		$ 34,204		$ 24,509
Segment operating expenses																	46,504	[2]	32,268	[2]	22,937	[2]
Stock-based compensation																	(557)		(424)		(341)
Other operating income (expense), net																	(154)		(106)		(102)
Income from operations																	862		1,406		1,129
Total non-operating income (expense)																	72		91		32
Provision for income taxes	(86)	[1]	(67)	[1]	(49)	[1]	(89)	[1]	(84)	[1]	(79)	[1]	(88)	[1]	(100)	[1]	(291)		(352)		(253)
Equity-method investment activity, net of tax							6										(12)		7		(6)
Net income	177	[1]	63	[1]	191	[1]	201	[1]	416	[1]	231	[1]	207	[1]	299	[1]	631		1,152		902
North America
Segment Reporting Information [Line Items]
Net Sales																	26,705		18,707		12,828
Segment operating expenses																	25,772	[2]	17,752	[2]	12,119	[2]
International
Segment Reporting Information [Line Items]
Net Sales																	21,372		15,497		11,681
Segment operating expenses																	20,732	[2]	14,516	[2]	10,818	[2]
Operating Segments
Segment Reporting Information [Line Items]
Income from operations																	1,573		1,936		1,572
Operating Segments | North America
Segment Reporting Information [Line Items]
Income from operations																	933		955		709
Operating Segments | International
Segment Reporting Information [Line Items]
Income from operations																	$ 640		$ 981		$ 863

[1] The sum of quarterly amounts, including per share amounts, may not equal amounts reported for year-to-date periods. This is due to the effects of rounding and changes in the number of weighted-average shares outstanding for each period.

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