CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Class A and Class B Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive (Loss) Income	Retained Earnings	Total Stockholders' Equity
Common stock, shares outstanding beginning at Dec. 31, 2012		2,372
Common stock, value, outstanding beginning at Dec. 31, 2012		$ 0
Total Stockholders' Equity, beginning at Dec. 31, 2012			$ 10,094	$ 2	$ 1,659	$ 11,755
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, shares		27
Issuance of common stock, net of issuance costs, value		$ 0	1,478			1,478
Issuance of common stock for cash upon exercise of stock options, shares		101
Issuance of common stock for cash upon exercise of stock options, value		$ 0	26			26
Issuance of common stock related to nonemployees for past services, shares		0
Issuance of common stock related to nonemployees for past services, value		$ 0	3			3
Issuance of common stock related to acquisitions, shares		9
Issuance of common stock related to acquisitions, value		$ 0	77			$ 77
Issuance of common stock for settlement of restricted stock units (RSUs)		65				0
Shares withheld related to net share settlement, shares		(27)
Shares withheld related to net share settlement, value			(889)			$ (889)
Share-based compensation, related to employee share-based awards			906			906
Tax benefit from share-based award activity			602			602
Other comprehensive income				12		12
Net income	$ 1,500				1,500	1,500
Common stock, shares outstanding ending at Dec. 31, 2013		2,547
Common stock, value, outstanding ending at Dec. 31, 2013		$ 0
Total Stockholders' Equity, ending at Dec. 31, 2013			12,297	14	3,159	15,470
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for cash upon exercise of stock options, shares		9
Issuance of common stock for cash upon exercise of stock options, value		$ 0	18			18
Issuance of common stock related to acquisitions, shares		201
Issuance of common stock related to acquisitions, value		$ 0	14,344			$ 14,344
Issuance of common stock for settlement of restricted stock units (RSUs)		41				0
Shares withheld related to net share settlement, shares		(1)
Shares withheld related to net share settlement, value			(73)			$ (73)
Share-based compensation, related to employee share-based awards			1,786			1,786
Tax benefit from share-based award activity			1,853			1,853
Other comprehensive income				(242)		(242)
Net income	2,940				2,940	2,940
Common stock, shares outstanding ending at Dec. 31, 2014		2,797
Common stock, value, outstanding ending at Dec. 31, 2014		$ 0
Total Stockholders' Equity, ending at Dec. 31, 2014	36,096		30,225	(228)	6,099	36,096
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for cash upon exercise of stock options, shares		4
Issuance of common stock for cash upon exercise of stock options, value		$ 0	0			$ 0
Issuance of common stock for settlement of restricted stock units (RSUs)		44				0
Shares withheld related to net share settlement, shares		0
Shares withheld related to net share settlement, value			(20)			$ (20)
Share-based compensation, related to employee share-based awards			2,960			2,960
Tax benefit from share-based award activity			1,721			1,721
Other comprehensive income				(227)		(227)
Net income	3,688				3,688	3,688
Common stock, shares outstanding ending at Dec. 31, 2015		2,845
Common stock, value, outstanding ending at Dec. 31, 2015		$ 0
Total Stockholders' Equity, ending at Dec. 31, 2015	$ 44,218		$ 34,886	$ (455)	$ 9,787	$ 44,218