Statement of Changes in Consolidated Equity (unaudited) - USD ($) $ in Millions	Total	Class A	Preferred stock	Common stock	Additional capital	Retained earnings	Retained earnings 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	131					131
Other comprehensive (loss) income	(1)							(1)
Cash dividends declared:
Preferred dividends declared, value		$ (1)					$ (1)
Common share, value	(8)					(8)
Repurchase and retirement of common stock	(175)			(5)	(170)
Stock-based compensation	11				11
Common stock issued: compensation plans	(8)			1	(9)
Ending balance at Mar. 31, 2022	3,457		55	418	4,123	725		(1,864)
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	148					148
Other comprehensive (loss) income	35							35
Cash dividends declared:
Preferred dividends declared, value		$ (1)					$ (1)
Common share, value	(16)					(16)
Repurchase and retirement of common stock	(25)				(25)
Stock-based compensation	14				14
Common stock issued: compensation plans	5				5
Ending balance at Mar. 31, 2023	$ 3,761		$ 55	$ 412	$ 3,941	$ 1,159		$ (1,806)