Consolidated Statements of Changes in Stockholders’ Equity - USD ($) $ in Millions	Total	Class A	Class B	Series A	Series B	Series C	Preferred Stock	Preferred Stock Series B	Preferred Stock Series C	Common Stock Class A	Common Stock Class B	Additional Paid in Capital	Additional Paid in Capital Class A	Retained Earnings	Retained Earnings Class A	Retained Earnings Class B	Retained Earnings Series A	Retained Earnings Series B	Retained Earnings Series C	Accumulated Other Comprehensive Income (Loss)
Beginning 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 income (loss), net of tax	(745)																			(745)
Issued in CIT Merger	5,279				$ 334	$ 207		$ 334	$ 207	6		5,273
Stock based compensation	75											75
Repurchased shares of 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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,466													11,466
Other comprehensive income (loss), net of tax	244																			244
Stock based compensation	(1)											(1)
Cash dividends declared		(53)	(4)												(53)	(4)
Preferred stock dividends declared				(18)	(30)	(11)											(18)	(30)	(11)
Ending balance, shareholders' equity at Dec. 31, 2023	21,255						881			14	1	4,108		16,742						(491)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,777													2,777
Other comprehensive income (loss), net of tax	46																			46
Stock based compensation	(12)											(12)
Repurchased shares of Class A common stock		(1,680)								(1)			$ (1,679)
Cash dividends declared		$ (91)	$ (6)												$ (91)	$ (6)
Preferred stock dividends declared				$ (19)	$ (31)	$ (11)											$ (19)	$ (31)	$ (11)
Ending balance, shareholders' equity at Dec. 31, 2024	$ 22,228						$ 881			$ 13	$ 1	$ 2,417		$ 19,361						$ (445)