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	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, 2022	$ 9,662						$ 881	$ 14	$ 1	$ 4,109	$ 5,392						$ (735)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,518										9,518
Other comprehensive income (loss), net of tax	66																66
Stock based compensation	(5)									(5)
Cash dividends declared		$ (10)	$ (1)									$ (10)	$ (1)
Preferred stock dividends declared:				$ (4)	$ (7)	$ (3)								$ (4)	$ (7)	$ (3)
Ending balance, shareholders' equity at Mar. 31, 2023	19,216						881	14	1	4,104	14,885						(669)
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 (loss), 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)