Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Paid-in Capital	Retained Earnings	Treasury Common Stock	AOCI
Balance, beginning balance at Dec. 31, 2018		$ 1,741	$ 1,950	$ 37,906	$ (32,130)	$ (473)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 5,017			5,017
Dividends declared and paid				(3,008)
Common stock issued for stock-based awards			(55)		594
Stock repurchases					(2,960)
Stock compensation			217
Other comprehensive income (loss), net of taxes	126					126
Dividend equivalents on RSUs				(17)
Other			(2)		1
Balance, ending balance at Dec. 31, 2019		1,741	2,110	39,898	(34,495)	(347)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,595			5,595
Dividends declared and paid				(3,426)
Common stock issued for stock-based awards			0		470
Stock repurchases					(2,553)
Stock compensation			224
Other comprehensive income (loss), net of taxes	(13)					(13)
Dividend equivalents on RSUs				(16)
Other			(1)
Balance, ending balance at Dec. 31, 2020	9,187	1,741	2,333	42,051	(36,578)	(360)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,769			7,769
Dividends declared and paid				(3,886)
Common stock issued for stock-based awards			67		310
Stock repurchases					(532)
Stock compensation			230
Other comprehensive income (loss), net of taxes	203					203
Dividend equivalents on RSUs				(15)
Balance, ending balance at Dec. 31, 2021	$ 13,333	$ 1,741	$ 2,630	$ 45,919	$ (36,800)	$ (157)