Consolidated Statements of Changes in Stockholders’ Equity (Unaudited) - USD ($) $ in Millions	Total	Class A	Class B	Series A	Series B	Series C	Preferred Stock	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, 2023	$ 21,255						$ 881	$ 14	$ 1	$ 4,108		$ 16,742						$ (491)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	731											731
Other comprehensive income, net of tax	(91)																	(91)
Stock based compensation	(9)									(9)
Cash dividends declared		$ (22)	$ (1)										$ (22)	$ (1)
Preferred stock dividends declared:				$ (4)	$ (8)	$ (3)									$ (4)	$ (8)	$ (3)
Ending balance, shareholders' equity at Mar. 31, 2024	21,848						881	14	1	4,099		17,435						(582)
Beginning balance, shareholders' equity at Dec. 31, 2024	22,228						881	13	1	2,417		19,361						(445)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	483											483
Other comprehensive income, net of tax	246																	246
Repurchased shares of Class A common stock		(620)						(1)			$ (619)
Cash dividends declared		$ (25)	$ (2)										$ (25)	$ (2)
Preferred stock dividends declared:				$ (5)	$ (7)	$ (3)									$ (5)	$ (7)	$ (3)
Ending balance, shareholders' equity at Mar. 31, 2025	$ 22,295						$ 881	$ 12	$ 1	$ 1,798		$ 19,802						$ (199)