Statement of Changes in Consolidated Equity (unaudited) - 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, 2022	$ 3,601		$ 55	$ 412	$ 3,947	$ 1,028		$ (1,841)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	529					529
Other comprehensive income (loss)	(9)							(9)
Cash dividends declared:
Preferred stock-Class A		$ (2)					$ (2)
Common	(70)					(70)
Repurchase and retirement of common stock (H)	(150)			(3)	(147)
Stock-based compensation	39				39
Common stock issued: compensation plans	(66)			3	(69)
Ending balance at Sep. 30, 2023	3,872		55	412	3,770	1,485		(1,850)
Beginning balance at Jun. 30, 2023	3,775		55	412	3,782	1,334		(1,808)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	188					188
Other comprehensive income (loss)	(42)							(42)
Cash dividends declared:
Preferred stock-Class A		(1)					(1)
Common	(36)					(36)
Repurchase and retirement of common stock (H)	(25)				(25)
Stock-based compensation	13				13
Ending balance at Sep. 30, 2023	3,872		55	412	3,770	1,485		(1,850)
Beginning balance at Dec. 31, 2023	4,037		55	410	3,682	1,720		(1,830)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	841					841
Other comprehensive income (loss)	32							32
Cash dividends declared:
Preferred stock-Class A		(2)					(2)
Common	(106)					(106)
Repurchase and retirement of common stock (H)	(313)			(4)	(309)
Stock-based compensation	54				54
Common stock issued: compensation plans	(40)			1	(41)
Ending balance at Sep. 30, 2024	4,503		55	407	3,386	2,453		(1,798)
Beginning balance at Jun. 30, 2024	4,277		55	408	3,486	2,186		(1,858)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	332					332
Other comprehensive income (loss)	60							60
Cash dividends declared:
Preferred stock-Class A		$ (1)					$ (1)
Common	(64)					(64)
Repurchase and retirement of common stock (H)	(102)			(1)	(101)
Stock-based compensation	16				16
Common stock issued: compensation plans	(15)				(15)
Ending balance at Sep. 30, 2024	$ 4,503		$ 55	$ 407	$ 3,386	$ 2,453		$ (1,798)