Consolidated Statements of Stockholders’ Equity - USD ($) $ in Millions	Total	Cumulative-effect adjustment	Preferred Stock	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative-effect adjustment	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2019	$ 12,153	$ (12)	$ 0	$ 937	$ (4,089)	$ 7,207	$ 7,993	$ (12)	$ 105
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased under buyback programs	(85)				(85)
Stock-based compensation	52				85	(33)
Net income (loss)	(1,451)						(1,451)
Other comprehensive income (loss)	(32)								(32)
Dividends paid	(64)						(64)
Ending Balance at Dec. 31, 2020	10,561		$ 0	$ 937	$ (4,089)	7,174	6,466		73
Beginning Balance - Preferred Stock (in shares) at Dec. 31, 2019			0
Beginning Balance - Common Stock (in shares) at Dec. 31, 2019				937,000,000
Beginning Balance - Treasury Stock (in shares) at Dec. 31, 2019					141,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued - stock based compensation (in shares)					(2,000,000)
Shares repurchased (in shares)					9,000,000
Ending Balance - Preferred Stock (in shares) at Dec. 31, 2020			0
Ending Balance - Common Stock (in shares) at Dec. 31, 2020				937,000,000
Ending Balance - Treasury Stock (in shares) at Dec. 31, 2020					148,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased under buyback programs	(724)				$ (724)
Stock-based compensation	35				(12)	47
Net income (loss)	946						946
Other comprehensive income (loss)	9								9
Dividends paid	(141)						(141)
Ending Balance at Dec. 31, 2021	$ 10,686		$ 0	$ 937	$ (4,825)	7,221	7,271		82
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued - stock based compensation (in shares)					0
Shares repurchased (in shares)					46,000,000
Ending Balance - Preferred Stock (in shares) at Dec. 31, 2021	0		0
Ending Balance - Common Stock (in shares) at Dec. 31, 2021				937,000,000
Ending Balance - Treasury Stock (in shares) at Dec. 31, 2021	194,000,000				194,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased under buyback programs	$ (2,754)				$ (2,754)
Stock-based compensation	49				67	(18)
Net income (loss)	3,612						3,612
Other comprehensive income (loss)	24								24
Dividends paid	(220)						(220)
Ending Balance at Dec. 31, 2022	$ 11,397		$ 0	$ 937	$ (7,512)	$ 7,203	$ 10,663		$ 106
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued - stock based compensation (in shares)					(3,000,000)
Shares repurchased (in shares)					113,000,000
Ending Balance - Preferred Stock (in shares) at Dec. 31, 2022	0		0
Ending Balance - Common Stock (in shares) at Dec. 31, 2022				937,000,000
Ending Balance - Treasury Stock (in shares) at Dec. 31, 2022	304,000,000				304,000,000