Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Millions	Total	Adoption of ASC 326	Class A Common Stock	Class B Common Stock	Series A Preferred Stock	Series B Preferred Stock	Series C Preferred Stock	Preferred Stock	Preferred Stock Series B Preferred Stock	Preferred Stock Series C Preferred Stock	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid in Capital	Retained Earnings	Retained Earnings Adoption of ASC 326	Retained Earnings Class A Common Stock	Retained Earnings Class B Common Stock	Retained Earnings Series A Preferred Stock	Retained Earnings Series B Preferred Stock	Retained Earnings Series C Preferred Stock	Accumulated Other Comprehensive (Loss) Income
Beginning balance, shareholders' equity at Dec. 31, 2019	$ 3,586	$ 37						$ 0			$ 10	$ 1	$ 44	$ 3,658	$ 37						$ (127)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	492													492
Other comprehensive loss, net of tax	139																				139
Issuance of stock	340							340
Repurchased Class A common stock	(334)										(1)		(44)	(289)
Cash dividends declared			$ (15)	$ (2)												$ (15)	$ (2)
Preferred stock dividends declared	(14)													(14)
Ending balance, shareholders' equity at Dec. 31, 2020	4,229							340			9	1	0	3,867							12
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	547													547
Other comprehensive loss, net of tax	(2)																				(2)
Cash dividends declared			(16)	(2)												(16)	(2)
Preferred stock dividends declared	(18)													(18)
Ending balance, shareholders' equity at Dec. 31, 2021	4,738							340			9	1	0	4,378							10
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,098													1,098
Other comprehensive loss, net of tax	(745)																				(745)
Issuance of stock	5,279					$ 334	$ 207		$ 334	$ 207	6		5,273
Stock-based compensation	75												75
Repurchased Class A common stock	(1,240)										(1)		(1,239)
Cash dividends declared			$ (32)	$ (2)												$ (32)	$ (2)
Preferred stock dividends declared					$ (19)	$ (20)	$ (11)											$ (19)	$ (20)	$ (11)
Ending balance, shareholders' equity at Dec. 31, 2022	$ 9,662							$ 881			$ 14	$ 1	$ 4,109	$ 5,392							$ (735)