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 (Loss) Income
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	1,438											1,438
Other comprehensive income/loss, net of tax	(119)																	(119)
Stock based compensation	$ (9)									(9)
Cash dividends declared per common share (in dollars per share)	$ 3.28
Cash dividends declared		$ (44)	$ (3)										$ (44)	$ (3)
Preferred stock dividends declared:				$ (9)	$ (16)	$ (6)									$ (9)	$ (16)	$ (6)
Ending balance, shareholders' equity at Jun. 30, 2024	$ 22,487						881	14	1	4,099		18,102						(610)
Beginning balance, shareholders' equity at Mar. 31, 2024	21,848						881	14	1	4,099		17,435						(582)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	707											707
Other comprehensive income/loss, net of tax	$ (28)																	(28)
Cash dividends declared per common share (in dollars per share)	$ 1.64
Cash dividends declared		(22)	$ (2)										(22)	(2)
Preferred stock dividends declared:				(5)	(8)	(3)									(5)	(8)	(3)
Ending balance, shareholders' equity at Jun. 30, 2024	$ 22,487						881	14	1	4,099		18,102						(610)
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	1,058											1,058
Other comprehensive income/loss, net of tax	$ 331																	331
Repurchased shares of Class A common stock		$ (1,239)						(1)			$ (1,238)
Cash dividends declared per common share (in dollars per share)	$ 3.90
Repurchased number of shares of Class A common stock (in shares)		641,642	0
Cash dividends declared		$ (49)	$ (4)										(49)	(4)
Preferred stock dividends declared:				(9)	(14)	(6)									(9)	(14)	(6)
Ending balance, shareholders' equity at Jun. 30, 2025	$ 22,296						881	12	1	1,179		20,337						(114)
Beginning balance, shareholders' equity at Mar. 31, 2025	22,295						881	12	1	1,798		19,802						(199)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	575											575
Other comprehensive income/loss, net of tax	$ 85																	85
Repurchased shares of Class A common stock		$ (619)									$ (619)
Cash dividends declared per common share (in dollars per share)	$ 1.95
Repurchased number of shares of Class A common stock (in shares)		338,959	0
Cash dividends declared		$ (24)	$ (2)										$ (24)	$ (2)
Preferred stock dividends declared:				$ (4)	$ (7)	$ (3)									$ (4)	$ (7)	$ (3)
Ending balance, shareholders' equity at Jun. 30, 2025	$ 22,296						$ 881	$ 12	$ 1	$ 1,179		$ 20,337						$ (114)