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			57
Tax withholdings related to net share settlements of restricted stock units and awards			(162)
Stock-based compensation			376
Common stock repurchased			0	(4,002)
Other			1
Net income	$ 1,230				1,230
Dividends and dividend equivalents declared					(374)
Foreign currency translation adjustment						(185)
Change in unrealized gains (losses) on investments	59					59
Change in unrealized gains (losses) on derivative instruments						5
Tax benefit (provision) on above items						(16)
Ending balance at Sep. 30, 2019	$ 3,270	2	15,988	(30,396)	17,315	361
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends and dividend equivalents declared per share or restricted stock unit (in usd per share)	$ 0.42
Beginning balance at Jun. 30, 2019		2	15,911	(29,396)	17,125	464
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued		0
Common stock repurchased/forfeited		0
Common stock and stock-based awards issued			2
Tax withholdings related to net share settlements of restricted stock units and awards			(43)
Stock-based compensation			116
Common stock repurchased			0	(1,000)
Other			2
Net income	$ 310				310
Dividends and dividend equivalents declared					(120)
Foreign currency translation adjustment						(133)
Change in unrealized gains (losses) on investments	3					3
Change in unrealized gains (losses) on derivative instruments						35
Tax benefit (provision) on above items						(8)
Ending balance at Sep. 30, 2019	$ 3,270	2	15,988	(30,396)	17,315	361
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			54
Tax withholdings related to net share settlements of restricted stock units and awards			(131)
Stock-based compensation			332
Common stock repurchased	(1,698)		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/forfeited		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