Statement of Changes in Consolidated Equity - USD ($) $ in Millions	Total	Preferred Class A	Preferred stock	Common stock	Additional capital	Retained earnings (Accumulated deficit)	Retained earnings (Accumulated deficit) Preferred Class A	Accumulated other comprehensive loss
Beginning balance at Dec. 31, 2020	$ 3,577		$ 55	$ 433	$ 4,668	$ 364		$ (1,943)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	258					258
Other comprehensive income (K)	80							80
Cash dividends declared:
Preferred		$ (2)					$ (2)
Common	(17)					(17)
Repurchase and retirement of common stock (I)	(430)			(13)	(417)
Stock-based compensation (I)	40				40
Common stock issued: compensation plans (I)	2			2
Ending balance at Dec. 31, 2021	3,508		55	422	4,291	603		(1,863)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	469					469
Other comprehensive income (K)	22							22
Cash dividends declared:
Preferred		(2)					(2)
Common	(42)					(42)
Repurchase and retirement of common stock (I)	(400)			(12)	(388)
Stock-based compensation (I)	54				54
Common stock issued: compensation plans (I)	(8)			2	(10)
Ending balance at Dec. 31, 2022	3,601		55	412	3,947	1,028		(1,841)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	765					765
Other comprehensive income (K)	11							11
Cash dividends declared:
Preferred		$ (2)					$ (2)
Common	(71)					(71)
Repurchase and retirement of common stock (I)	(251)			(5)	(246)
Stock-based compensation (I)	50				50
Common stock issued: compensation plans (I)	(66)			3	(69)
Ending balance at Dec. 31, 2023	$ 4,037		$ 55	$ 410	$ 3,682	$ 1,720		$ (1,830)