CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common stock	Additional paid-in capital	Treasury stock at cost	Retained earnings	Accumulated other comprehensive income
Beginning balance at Dec. 31, 2018		$ 2	$ 15,716	$ (26,394)	$ 16,459	$ 498
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock repurchased/forfeited		0
Common stock and stock-based awards issued			55
Tax withholdings related to net share settlements of restricted stock units and awards			(119)
Stock-based compensation			260
Common stock repurchased			0	(3,002)
Other			(1)
Net income	$ 920				920
Dividends and dividend equivalents declared					(254)
Foreign currency translation adjustment						(52)
Change in unrealized gains (losses) on investments	56					56
Change in unrealized gains (losses) on derivative instruments						(30)
Tax benefit (provision) on above items						(8)
Ending balance at Jun. 30, 2019	$ 4,106	2	15,911	(29,396)	17,125	464
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends and dividend equivalents declared per share or restricted stock unit (in usd per share)	$ 0.28
Beginning balance at Mar. 31, 2019		2	15,785	(27,895)	16,847	464
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock repurchased/forfeited		0
Common stock and stock-based awards issued			52
Tax withholdings related to net share settlements of restricted stock units and awards			(65)
Stock-based compensation			139
Common stock repurchased			0	(1,501)
Other			0
Net income	$ 402				402
Dividends and dividend equivalents declared					(124)
Foreign currency translation adjustment						(20)
Change in unrealized gains (losses) on investments	16					16
Change in unrealized gains (losses) on derivative instruments						11
Tax benefit (provision) on above items						(7)
Ending balance at Jun. 30, 2019	$ 4,106	2	15,911	(29,396)	17,125	464
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends and dividend equivalents declared per share or restricted stock unit (in usd per share)	$ 0.14
Beginning balance at Dec. 31, 2019	$ 2,870	2	16,126	(31,396)	17,754	384
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock repurchased/forfeited		0
Common stock and stock-based awards issued			49
Tax withholdings related to net share settlements of restricted stock units and awards			(83)
Stock-based compensation			210
Common stock repurchased	(998)		(450)	(3,550)
Other			(8)
Net income	4,158				4,158
Dividends and dividend equivalents declared					(231)
Foreign currency translation adjustment						(64)
Change in unrealized gains (losses) on investments	1					1
Change in unrealized gains (losses) on derivative instruments						0
Tax benefit (provision) on above items						0
Ending balance at Jun. 30, 2020	$ 2,902	2	15,844	(34,946)	21,681	321
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends and dividend equivalents declared per share or restricted stock unit (in usd per share)	$ 0.32
Beginning balance at Mar. 31, 2020		2	15,723	(34,946)	21,051	285
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock repurchased/forfeited		0
Common stock and stock-based awards issued			45
Tax withholdings related to net share settlements of restricted stock units and awards			(43)
Stock-based compensation			116
Common stock repurchased			0	0
Other			3
Net income	$ 746				746
Dividends and dividend equivalents declared					(116)
Foreign currency translation adjustment						49
Change in unrealized gains (losses) on investments	32					32
Change in unrealized gains (losses) on derivative instruments						(47)
Tax benefit (provision) on above items						2
Ending balance at Jun. 30, 2020	$ 2,902	$ 2	$ 15,844	$ (34,946)	$ 21,681	$ 321
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends and dividend equivalents declared per share or restricted stock unit (in usd per share)	$ 0.16