Net Income Per Share of Class A and Class B Common Stock (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Numerator
Allocation of undistributed earnings - continuing operations	$ 3,490		$ 2,774		$ 7,140		$ 6,302
Allocation of undistributed earnings - discontinued operations	(68)	[1]	454	[1]	(266)	[1]	272	[1]
Net income	3,422		3,228		6,874		6,574
Denominator
Number of shares used in basic computation	675,115		664,960		673,851		662,934
Continuing operations (in dollars per share)	$ 5.17		$ 4.17		$ 10.59		$ 9.51
Discontinued operations (in dollars per share)	$ (0.10)		$ 0.68		$ (0.39)		$ 0.41
Net income per share - basic (in dollars per share)	$ 5.07		$ 4.85		$ 10.20		$ 9.92
Numerator
Allocation of undistributed earnings - continuing operations	3,490		2,774		7,140		6,302
Allocation of undistributed earnings - discontinued operations	(68)	[1]	454	[1]	(266)	[1]	272	[1]
Denominator
Number of shares used in basic computation	675,115		664,960		673,851		662,934
Weighted-average effect of dilutive securities
Number of shares used in diluted per share computation	686,363		676,674		685,788		675,000
Continuing operations (in dollars per share)	$ 5.09		$ 4.10		$ 10.41		$ 9.34
Discontinued operations (in dollars per share)	$ (0.10)		$ 0.67		$ (0.39)		$ 0.40
Net income per share - diluted (in dollars per share)	$ 4.99		$ 4.77		$ 10.02		$ 9.74
Class A Common Stock
Numerator
Allocation of undistributed earnings - continuing operations	1,459		1,136		2,979		2,572
Allocation of undistributed earnings - discontinued operations	(28)		186		(111)		111
Net income	1,431		1,322		2,868		2,683
Denominator
Number of shares used in basic computation	282,216		272,417		281,160		270,582
Continuing operations (in dollars per share)	$ 5.17		$ 4.17		$ 10.59		$ 9.51
Discontinued operations (in dollars per share)	$ (0.10)		$ 0.68		$ (0.39)		$ 0.41
Net income per share - basic (in dollars per share)	$ 5.07		$ 4.85		$ 10.20		$ 9.92
Numerator
Allocation of undistributed earnings - continuing operations	1,459		1,136		2,979		2,572
Allocation of undistributed earnings - discontinued operations	(28)		186		(111)		111
Denominator
Number of shares used in basic computation	282,216		272,417		281,160		270,582
Weighted-average effect of dilutive securities
Conversion of Class B to Class A common shares outstanding (in shares)	55,300		60,063		55,702		60,885
Employee stock options, including warrants issued under Transferable Stock Option program (in shares)	2,010		2,664		2,216		2,896
Restricted stock units and other contingently issuable shares (in shares)	3,104		3,193		3,499		3,137
Number of shares used in diluted per share computation	342,630		338,337		342,577		337,500
Continuing operations (in dollars per share)	$ 5.09		$ 4.10		$ 10.41		$ 9.34
Discontinued operations (in dollars per share)	$ (0.10)		$ 0.67		$ (0.39)		$ 0.40
Net income per share - diluted (in dollars per share)	$ 4.99		$ 4.77		$ 10.02		$ 9.74
Class A Common Stock | Continuing Operations
Numerator
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares	286		251		590		579
Reallocation of undistributed earnings	(3)		0		(2)		0
Allocation of undistributed earnings	1,742		1,387		3,567		3,151
Class A Common Stock | Discontinued operations
Numerator
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares	(6)		41		(22)		25
Reallocation of undistributed earnings	0		0		0		0
Allocation of undistributed earnings	(34)		227		(133)		136
Class B Common Stock
Numerator
Allocation of undistributed earnings - continuing operations	286		251		590		579
Allocation of undistributed earnings - discontinued operations	(6)		41		(22)		25
Net income	280		292		568		604
Denominator
Number of shares used in basic computation	55,300		60,063		55,702		60,885
Continuing operations (in dollars per share)	$ 5.17		$ 4.17		$ 10.59		$ 9.51
Discontinued operations (in dollars per share)	$ (0.10)		$ 0.68		$ (0.39)		$ 0.41
Net income per share - basic (in dollars per share)	$ 5.07		$ 4.85		$ 10.20		$ 9.92
Numerator
Allocation of undistributed earnings - continuing operations	286		251		590		579
Allocation of undistributed earnings - discontinued operations	(6)		41		(22)		25
Denominator
Number of shares used in basic computation	55,300		60,063		55,702		60,885
Weighted-average effect of dilutive securities
Conversion of Class B to Class A common shares outstanding (in shares)	0		0		0		0
Employee stock options, including warrants issued under Transferable Stock Option program (in shares)	0		4		0		8
Restricted stock units and other contingently issuable shares (in shares)	0		0		0		0
Number of shares used in diluted per share computation	55,300		60,067		55,702		60,893
Continuing operations (in dollars per share)	$ 5.09		$ 4.10		$ 10.41		$ 9.34
Discontinued operations (in dollars per share)	$ (0.10)		$ 0.67		$ (0.39)		$ 0.40
Net income per share - diluted (in dollars per share)	$ 4.99		$ 4.77		$ 10.02		$ 9.74
Class B Common Stock | Continuing Operations
Numerator
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares	0		0		0		0
Reallocation of undistributed earnings	(5)		(5)		(10)		(10)
Allocation of undistributed earnings	281		246		580		569
Class B Common Stock | Discontinued operations
Numerator
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares	0		0		0		0
Reallocation of undistributed earnings	1		(1)		0		(1)
Allocation of undistributed earnings	(5)		40		(22)		24
Class C Capital Stock
Numerator
Allocation of undistributed earnings - continuing operations	1,745		1,387		3,571		3,151
Allocation of undistributed earnings - discontinued operations	(34)		227		(133)		136
Net income	1,711		1,614		3,438		3,287
Denominator
Number of shares used in basic computation	337,599		332,480		336,989		331,467
Continuing operations (in dollars per share)	$ 5.17		$ 4.17		$ 10.59		$ 9.51
Discontinued operations (in dollars per share)	$ (0.10)		$ 0.68		$ (0.39)		$ 0.41
Net income per share - basic (in dollars per share)	$ 5.07		$ 4.85		$ 10.20		$ 9.92
Numerator
Allocation of undistributed earnings - continuing operations	1,745		1,387		3,571		3,151
Allocation of undistributed earnings - discontinued operations	(34)		227		(133)		136
Denominator
Number of shares used in basic computation	337,599		332,480		336,989		331,467
Weighted-average effect of dilutive securities
Conversion of Class B to Class A common shares outstanding (in shares)	0		0		0		0
Employee stock options, including warrants issued under Transferable Stock Option program (in shares)	2,004		2,664		2,210		2,896
Restricted stock units and other contingently issuable shares (in shares)	4,130		3,193		4,012		3,137
Number of shares used in diluted per share computation	343,733		338,337		343,211		337,500
Continuing operations (in dollars per share)	$ 5.09		$ 4.10		$ 10.41		$ 9.34
Discontinued operations (in dollars per share)	$ (0.10)		$ 0.67		$ (0.39)		$ 0.40
Net income per share - diluted (in dollars per share)	$ 4.99		$ 4.77		$ 10.02		$ 9.74
Class C Capital Stock | Continuing Operations
Numerator
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares	0		0		0		0
Reallocation of undistributed earnings	3		0		2		0
Allocation of undistributed earnings	1,748		1,387		3,573		3,151
Class C Capital Stock | Discontinued operations
Numerator
Reallocation of undistributed earnings as a result of conversion of Class B to Class A shares	0		0		0		0
Reallocation of undistributed earnings	0		0		0		0
Allocation of undistributed earnings	$ (34)		$ 227		$ (133)		$ 136

[1] (1) Includes stock-based compensation expense as follows: Cost of revenues$110 $100 $209 $195Research and development401 447 739 903Sales and marketing125 158 243 305General and administrative107 175 207 316Discontinued operations104 35 157 83Total stock-based compensation expense$847 $915 $1,555 $1,802