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			54
Tax withholdings related to net share settlements of restricted stock units and awards			(131)
Stock-based compensation			332
Common stock repurchased			0	(4,700)
Other			(8)
Net income	$ 4,822				4,822
Dividends and dividend equivalents declared					(346)
Foreign currency translation adjustment						57
Change in unrealized gains (losses) on investments	1					1
Change in unrealized gains (losses) on derivative instruments						(41)
Tax benefit (provision) on above items						10
Ending balance at Sep. 30, 2020	$ 2,920	2	16,373	(36,096)	22,230	411
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends and dividend equivalents declared per share or restricted stock unit (in usd per share)	$ 0.48
Beginning balance at Jun. 30, 2020		2	15,844	(34,946)	21,681	321
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock repurchased		0
Common stock and stock-based awards issued			5
Tax withholdings related to net share settlements of restricted stock units and awards			(48)
Stock-based compensation			122
Common stock repurchased			450	(1,150)
Other			0
Net income	$ 664				664
Dividends and dividend equivalents declared					(115)
Foreign currency translation adjustment						121
Change in unrealized gains (losses) on investments	0					0
Change in unrealized gains (losses) on derivative instruments						(41)
Tax benefit (provision) on above items						10
Ending balance at Sep. 30, 2020	$ 2,920	2	16,373	(36,096)	22,230	411
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			59
Tax withholdings related to net share settlements of restricted stock units and awards			(186)
Stock-based compensation			386
Common stock repurchased	(4,042)		0	(4,044)
Other			(6)
Net income	11,639				11,639
Dividends and dividend equivalents declared					(370)
Foreign currency translation adjustment						(192)
Change in unrealized gains (losses) on investments	(4)					(4)
Change in unrealized gains (losses) on derivative instruments						130
Tax benefit (provision) on above items						(28)
Ending balance at Sep. 30, 2021	$ 10,945	2	16,750	(40,559)	34,230	522
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends and dividend equivalents declared per share or restricted stock unit (in usd per share)	$ 0.54
Beginning balance at Jun. 30, 2021		2	16,676	(38,308)	34,086	560
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock repurchased		0
Common stock and stock-based awards issued			1
Tax withholdings related to net share settlements of restricted stock units and awards			(58)
Stock-based compensation			130
Common stock repurchased			0	(2,251)
Other			1
Net income	$ 264				264
Dividends and dividend equivalents declared					(120)
Foreign currency translation adjustment						(85)
Change in unrealized gains (losses) on investments	0					0
Change in unrealized gains (losses) on derivative instruments						60
Tax benefit (provision) on above items						(13)
Ending balance at Sep. 30, 2021	$ 10,945	$ 2	$ 16,750	$ (40,559)	$ 34,230	$ 522
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends and dividend equivalents declared per share or restricted stock unit (in usd per share)	$ 0.18