Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Beginning balance at Dec. 31, 2022	$ 11,397	$ 0	$ 937	$ (7,512)	$ 7,203	$ 10,663	$ 106
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased under buyback programs	(334)			(334)
Excise tax on shares repurchased	(3)			(3)
Stock-based compensation	(19)			35	(54)
Net income	417					417
Other comprehensive loss	(7)						(7)
Dividends paid	(63)					(63)
Ending balance at Mar. 31, 2023	11,388	0	937	(7,814)	7,149	11,017	99
Beginning balance at Dec. 31, 2023	11,205	0	937	(8,952)	7,172	11,966	82
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased under buyback programs	(285)			(285)
Excise tax on shares repurchased	(2)			(2)
Stock-based compensation	(5)			38	(43)
Net income	297					297
Other comprehensive loss	(2)						(2)
Dividends paid	(64)					(64)
Ending balance at Mar. 31, 2024	$ 11,144	$ 0	$ 937	$ (9,201)	$ 7,129	$ 12,199	$ 80