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, 2019		$ 2	$ 16,126	$ (31,396)	$ 17,754	$ 384
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock repurchased		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			(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		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
Beginning balance at Dec. 31, 2020	$ 3,561	2	16,497	(36,515)	22,961	616
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock repurchased		0
Common stock and stock-based awards issued			58
Tax withholdings related to net share settlements of restricted stock units and awards			(128)
Stock-based compensation			256
Common stock repurchased	(1,792)		0	(1,793)
Other			(7)
Net income	11,375				11,375
Dividends and dividend equivalents declared					(250)
Foreign currency translation adjustment						(107)
Change in unrealized gains (losses) on investments	(4)					(4)
Change in unrealized gains (losses) on derivative instruments						70
Tax benefit (provision) on above items						(15)
Ending balance at Jun. 30, 2021	$ 13,016	2	16,676	(38,308)	34,086	560
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends and dividend equivalents declared per share or restricted stock unit (in usd per share)	$ 0.36
Beginning balance at Mar. 31, 2021		2	16,546	(36,807)	23,476	553
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock repurchased		0
Common stock and stock-based awards issued			57
Tax withholdings related to net share settlements of restricted stock units and awards			(59)
Stock-based compensation			140
Common stock repurchased			0	(1,501)
Other			(8)
Net income	$ 10,734				10,734
Dividends and dividend equivalents declared					(124)
Foreign currency translation adjustment						10
Change in unrealized gains (losses) on investments	(1)					(1)
Change in unrealized gains (losses) on derivative instruments						(4)
Tax benefit (provision) on above items						2
Ending balance at Jun. 30, 2021	$ 13,016	$ 2	$ 16,676	$ (38,308)	$ 34,086	$ 560
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends and dividend equivalents declared per share or restricted stock unit (in usd per share)	$ 0.18