Statement of Changes in Consolidated Equity - USD ($) $ in Millions	Total	Preferred Class A	Preferred stock	Common stock	Additional capital	Retained earnings	Retained earnings Preferred Class A	Accumulated other comprehensive loss
Beginning 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 (loss) (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 (loss) (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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,155					1,155
Other comprehensive income (loss) (K)	(48)							(48)
Cash dividends declared:
Preferred		$ (2)					$ (2)
Common	(107)					(107)
Repurchase and retirement of common stock (I)	(504)			(6)	(498)
Stock-based compensation (I)	63				63
Common stock issued: compensation plans (I)	(40)			1	(41)
Ending balance at Dec. 31, 2024	$ 4,554		$ 55	$ 405	$ 3,206	$ 2,766		$ (1,878)