CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Class A and Class B Common Stock, Class C Capital Stock and Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning Balance at Dec. 31, 2016	$ 139,036	$ 36,307	$ (2,402)	$ 105,131
Beginning Balance (in shares) at Dec. 31, 2016		691,293
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common and capital stock issued	212	$ 212
Common and capital stock issued (in shares)		8,652
Stock-based compensation expense	7,694	$ 7,694
Tax withholding related to vesting of restricted stock units and other	(4,373)	(4,373)
Repurchases of capital stock	(4,846)	$ (315)		(4,531)
Repurchases of capital stock (in shares)		(5,162)
Sale of interest in consolidated entities	722	$ 722
Net income	12,662			12,662
Other comprehensive income (loss)	1,410		1,410
Ending Balance at Dec. 31, 2017	152,502	$ 40,247	(992)	113,247
Ending Balance (in shares) at Dec. 31, 2017		694,783
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common and capital stock issued	148
Common and capital stock issued (in shares)		8,975
Stock-based compensation expense	9,353	$ 9,353
Tax withholding related to vesting of restricted stock units and other	(4,782)	(4,782)
Repurchases of capital stock	(9,075)	$ (576)		(8,499)
Repurchases of capital stock (in shares)		(8,202)
Sale of interest in consolidated entities	659	$ 659
Net income	30,736			30,736
Other comprehensive income (loss)	(1,216)		(1,216)
Ending Balance at Dec. 31, 2018	177,628	$ 45,049	(2,306)	134,885
Ending Balance (in shares) at Dec. 31, 2018		695,556
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common and capital stock issued	202	$ 202
Common and capital stock issued (in shares)		8,120
Stock-based compensation expense	10,890	$ 10,890
Tax withholding related to vesting of restricted stock units and other	(4,455)	(4,455)
Repurchases of capital stock	(18,396)	$ (1,294)		(17,102)
Repurchases of capital stock (in shares)		(15,341)
Sale of interest in consolidated entities	160	$ 160
Net income	34,343			34,343
Other comprehensive income (loss)	1,104		1,104
Ending Balance at Dec. 31, 2019	$ 201,442	$ 50,552	$ (1,232)	$ 152,122
Ending Balance (in shares) at Dec. 31, 2019		688,335