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			4
Tax withholdings related to net share settlements of restricted stock units and awards			(40)
Stock-based compensation			94
Common stock repurchased			(450)	(3,550)
Other			(11)
Net income	$ 3,412				3,412
Dividends and dividend equivalents declared					(115)
Foreign currency translation adjustment						(113)
Change in unrealized gains (losses) on investments	(31)					(31)
Change in unrealized gains (losses) on derivative instruments						47
Tax benefit (provision) on above items						(2)
Ending balance at Mar. 31, 2020	$ 2,115	2	15,723	(34,946)	21,051	285
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			1
Tax withholdings related to net share settlements of restricted stock units and awards			(69)
Stock-based compensation			116
Common stock repurchased	(292)		0	(292)
Other			1
Net income	641				641
Dividends and dividend equivalents declared					(126)
Foreign currency translation adjustment						(117)
Change in unrealized gains (losses) on investments	(3)					(3)
Change in unrealized gains (losses) on derivative instruments						74
Tax benefit (provision) on above items						(17)
Ending balance at Mar. 31, 2021	$ 3,770	$ 2	$ 16,546	$ (36,807)	$ 23,476	$ 553
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends and dividend equivalents declared per share or restricted stock unit (in usd per share)	$ 0.18