Stock Option Activity (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Options Outstanding - Number of Shares
Balance at December 31, 2011	9,807,252
Granted	1,392,191	[1]
Exercised	(2,409,331)
Forfeited/canceled	(238,717)
Balance at December 31, 2012	8,551,395
Vested and exercisable as of December 31, 2012	6,023,559
Vested and exercisable as of December 31, 2012 and expected to vest thereafter	8,218,732	[2]
Options Outstanding - Weighted-Average Exercise Price
Balance at December 31, 2011	$ 357.92
Granted	$ 580.45	[1]
Exercised	$ 305.81
Forfeited/canceled	$ 460.45
Balance at December 31, 2012	$ 405.98
Vested and exercisable as of December 31, 2012	$ 351.44
Vested and exercisable as of December 31, 2012 and expected to vest thereafter	$ 400.72	[2]
Options Outstanding - Weighted-Average Remaining Contractual Term
Balance at December 31, 2012	5 years 2 months 12 days
Vested and exercisable as of December 31, 2012	4 years 1 month 6 days
Vested and exercisable as of December 31, 2012 and expected to vest thereafter	5 years 2 months 12 days	[2]
Options Outstanding - Average Intrinsic Value
Balance at December 31, 2012	$ 2,516	[3]
Vested and exercisable as of December 31, 2012	2,099	[3]
Vested and exercisable as of December 31, 2012 and expected to vest thereafter	$ 2,461	[2],[3]

[1] Includes options granted in connection with the acquisition of Motorola.

[2] Options expected to vest reflect an estimated forfeiture rate.

[3] The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the closing stock price of $707.38 of our Class A common stock on December 31, 2012.