CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Class C Capital Stock	Class A and Class B Common Stock, Class C Capital Stock and Additional Paid-In Capital	Class A and Class B Common Stock, Class C Capital Stock and Additional Paid-In Capital Class C Capital Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained Earnings Class C Capital Stock
Beginning Balance (in shares) at Dec. 31, 2013			671,664
Beginning Balance at Dec. 31, 2013	$ 86,977		$ 25,922		$ 125	$ 60,930
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common and capital stock issued (in shares)			8,508
Common stock issued	465		$ 465
Stock-based compensation expense	4,279		4,279
Stock-based compensation tax benefits	625		625
Tax withholding related to vesting of restricted stock units	(2,524)		(2,524)
Net income	14,136					14,136
Other comprehensive loss	(98)				(98)	0
Ending Balance at Dec. 31, 2014	103,860		$ 28,767		27	75,066
Ending Balance (in shares) at Dec. 31, 2014			680,172
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common and capital stock issued (in shares)			8,714
Common stock issued	664		$ 664
Stock-based compensation expense	5,151		5,151
Stock-based compensation tax benefits	815		815
Tax withholding related to vesting of restricted stock units	(2,779)		$ (2,779)
Repurchases of capital stock (in shares)			(2,391)
Repurchases of capital stock	(1,780)		$ (111)			(1,669)
Adjustment Payment to Class C capital stockholders (in shares)				853
Adjustment Payment to Class C capital stockholders		$ (47)		$ 475			$ (522)
Net income	16,348					16,348
Other comprehensive loss	(1,901)				(1,901)
Ending Balance at Dec. 31, 2015	120,331		$ 32,982		(1,874)	89,223
Ending Balance (in shares) at Dec. 31, 2015			687,348
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of accounting change	47		$ 180			(133)
Common and capital stock issued (in shares)			9,106
Common stock issued	298		$ 298
Stock-based compensation expense	6,700		6,700
Tax withholding related to vesting of restricted stock units	(3,597)		$ (3,597)
Repurchases of capital stock (in shares)			(5,161)
Repurchases of capital stock	(3,693)		$ (256)			(3,437)
Net income	19,478					19,478
Other comprehensive loss	(528)				(528)
Ending Balance at Dec. 31, 2016	$ 139,036		$ 36,307		$ (2,402)	$ 105,131
Ending Balance (in shares) at Dec. 31, 2016			691,293