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	278					278
Other comprehensive (loss) income	(129)							(129)
Cash dividends declared:
Preferred		$ (1)					$ (1)
Common	(17)					(17)
Repurchase and retirement of common stock	(235)			(7)	(228)
Stock-based compensation	29				29
Common stock issued: compensation plans	(12)			1	(13)
Ending balance at Jun. 30, 2022	3,421		55	416	4,079	863		(1,992)
Beginning balance at Mar. 31, 2022	3,457		55	418	4,123	725		(1,864)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	147					147
Other comprehensive (loss) income	(128)							(128)
Cash dividends declared:
Common	(9)					(9)
Repurchase and retirement of common stock	(60)			(2)	(58)
Stock-based compensation	18				18
Common stock issued: compensation plans	(4)				(4)
Ending balance at Jun. 30, 2022	3,421		55	416	4,079	863		(1,992)
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	341					341
Other comprehensive (loss) income	33							33
Cash dividends declared:
Preferred		$ (1)					$ (1)
Common	(34)					(34)
Repurchase and retirement of common stock	(125)			(3)	(122)
Stock-based compensation	26				26
Common stock issued: compensation plans	(66)			3	(69)
Ending balance at Jun. 30, 2023	3,775		55	412	3,782	1,334		(1,808)
Beginning balance at Mar. 31, 2023	3,761		55	412	3,941	1,159		(1,806)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	193					193
Other comprehensive (loss) income	(2)							(2)
Cash dividends declared:
Common	(18)					(18)
Repurchase and retirement of common stock	(100)			(3)	(97)
Stock-based compensation	12				12
Common stock issued: compensation plans	(71)			3	(74)
Ending balance at Jun. 30, 2023	$ 3,775		$ 55	$ 412	$ 3,782	$ 1,334		$ (1,808)