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 (loss)	2,628				2,628
Common stock dividends declared	(2,519)				(2,519)
Other Comprehensive income (loss)	0			0
Common Stock Issued Under Stock Plans	13		13
Restricted Stock and Restricted Stock Units, Net	0		(2)			2
Stock-Based Compensation Expenses	65		65
Change in Treasury Stock - Stock Compensation Plans, Net	(55)		(35)			(20)
Treasury Stock Issued as Compensation	0
Ending balance at Jun. 30, 2022	22,312	206	6,128	(12)	16,028	(38)
Beginning balance at Mar. 31, 2022	21,540	206	6,095	(13)	15,283	(31)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,238				2,238
Common stock dividends declared	(1,493)				(1,493)
Other Comprehensive income (loss)	1			1
Common Stock Issued Under Stock Plans	13		13
Restricted Stock and Restricted Stock Units, Net	0		1			(1)
Stock-Based Compensation Expenses	30		30
Change in Treasury Stock - Stock Compensation Plans, Net	(17)		(11)			(6)
Ending balance at Jun. 30, 2022	22,312	206	6,128	(12)	16,028	(38)
Beginning balance at Dec. 31, 2022	24,779	206	6,187	(8)	18,472	(78)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,576				3,576
Common stock dividends declared	(1,551)				(1,551)
Other Comprehensive income (loss)	(1)			(1)
Common Stock Issued Under Stock Plans	0		0
Restricted Stock and Restricted Stock Units, Net	0		(2)			2
Stock-Based Compensation Expenses	69		69
Treasury Stock Repurchased	(615)					(615)
Change in Treasury Stock - Stock Compensation Plans, Net	0		3			(3)
Ending balance at Jun. 30, 2023	26,257	206	6,257	(9)	20,497	(694)
Beginning balance at Mar. 31, 2023	25,447	206	6,219	(8)	19,423	(393)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,553				1,553
Common stock dividends declared	(479)				(479)
Other Comprehensive income (loss)	(1)			(1)
Common Stock Issued Under Stock Plans	0		0
Restricted Stock and Restricted Stock Units, Net	0		(3)			3
Stock-Based Compensation Expenses	35		35
Treasury Stock Repurchased	(305)					(305)
Change in Treasury Stock - Stock Compensation Plans, Net	7		6			1
Ending balance at Jun. 30, 2023	$ 26,257	$ 206	$ 6,257	$ (9)	$ 20,497	$ (694)