CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock	Additional Paid In Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Common Stock Held In Treasury
Beginning balance at Dec. 31, 2021	$ 22,180	$ 206	$ 6,087	$ (12)	$ 15,919	$ (20)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	5,482				5,482
Common stock dividends declared	(3,838)				(3,838)
Other Comprehensive Income	6			6
Common Stock Issued Under Stock Plans	13		13
Restricted Stock and Restricted Stock Units, Net	0		(4)			4
Stock-Based Compensation Expenses	99		99
Change in Treasury Stock - Stock Compensation Plans, Net	(93)		(40)			(53)
Treasury Stock Issued as Compensation	0
Ending balance at Sep. 30, 2022	23,849	206	6,155	(6)	17,563	(69)
Beginning balance at Jun. 30, 2022	22,312	206	6,128	(12)	16,028	(38)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	2,854				2,854
Common stock dividends declared	(1,319)				(1,319)
Other Comprehensive Income	6			6
Common Stock Issued Under Stock Plans	0		0
Restricted Stock and Restricted Stock Units, Net	0		(2)			2
Stock-Based Compensation Expenses	34		34
Change in Treasury Stock - Stock Compensation Plans, Net	(38)		(5)			(33)
Ending balance at Sep. 30, 2022	23,849	206	6,155	(6)	17,563	(69)
Beginning balance at Dec. 31, 2022	24,779	206	6,187	(8)	18,472	(78)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	5,606				5,606
Common stock dividends declared	(2,031)				(2,031)
Other Comprehensive Income	1			1
Common Stock Issued Under Stock Plans	0		0
Restricted Stock and Restricted Stock Units, Net	0		(156)			156
Stock-Based Compensation Expenses	126		126
Treasury Stock Repurchased	(676)					(676)
Change in Treasury Stock - Stock Compensation Plans, Net	(47)		(24)			(23)
Ending balance at Sep. 30, 2023	27,758	206	6,133	(7)	22,047	(621)
Beginning balance at Jun. 30, 2023	26,257	206	6,257	(9)	20,497	(694)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	2,030				2,030
Common stock dividends declared	(480)				(480)
Other Comprehensive Income	2			2
Common Stock Issued Under Stock Plans	0		0
Restricted Stock and Restricted Stock Units, Net	0		(154)			154
Stock-Based Compensation Expenses	57		57
Treasury Stock Repurchased	(61)					(61)
Change in Treasury Stock - Stock Compensation Plans, Net	(47)		(27)			(20)
Ending balance at Sep. 30, 2023	$ 27,758	$ 206	$ 6,133	$ (7)	$ 22,047	$ (621)