Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent	Retained Earnings [Member]	Noncontrolling Interest [Member]
Beginning period (in shares) at Dec. 31, 2016		1,310
Beginning Balance at Dec. 31, 2016	$ 19,363	$ 1	$ 454	$ 278	$ 18,154	$ 476
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in noncontrolling interest	(436)		(3)			(433)
Net income	4,644				4,628	16
Other comprehensive income, net of tax	(113)			(113)
Issuances under employee stock purchase plan, Shares		1
Issuances under employee stock purchase plan	83		83
Issuance under equity incentive plans, Shares		11
Issuances under equity incentive plans	146		146
Stock-based compensation	618		618
Repurchases of common stock, shares		(14)
Repurchases of common stock	(1,062)		(34)		(1,028)
Dividends declared	(2,742)				(2,742)
Ending period (in shares) at Dec. 31, 2017		1,308
Ending Balance at Dec. 31, 2017	20,501	$ 1	1,264	165	19,012	59
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in noncontrolling interest	83		0			83
Net income	5,460				5,455	5
Other comprehensive income, net of tax	208			208
Issuances under employee stock purchase plan, Shares		2
Issuances under employee stock purchase plan	91		91
Issuance under equity incentive plans, Shares		14
Issuances under equity incentive plans	197		197
Stock-based compensation	842		842
Repurchases of common stock, shares		(42)
Repurchases of common stock	(3,052)		(112)		(2,940)
Dividends declared	$ (2,986)				(2,986)
Ending period (in shares) at Dec. 31, 2018	1,282	1,282
Ending Balance at Dec. 31, 2018	$ 21,534	$ 1	2,282	80	19,024	147
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,364				5,386	(22)
Other comprehensive income, net of tax	5			5
Issuances under employee stock purchase plan, Shares		2
Issuances under employee stock purchase plan	90		90
Issuance under equity incentive plans, Shares		10
Issuances under equity incentive plans	118		118
Stock-based compensation	638		638
Repurchases of common stock, shares		(28)
Repurchases of common stock	(1,868)		(77)		(1,791)
Dividends declared	$ (3,239)				(3,239)
Ending period (in shares) at Dec. 31, 2019	1,266	1,266
Ending Balance at Dec. 31, 2019	$ 22,650	$ 1	$ 3,051	$ 85	$ 19,388	$ 125