Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Series D Preferred Stock	Preferred Shares	Common Shares	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained Earnings Series D Preferred Stock
Beginning Balance at Dec. 31, 2021	$ 22,177		$ 0	$ 153	$ 11,495	$ (2,945)	$ 13,474
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,514						7,514
Other comprehensive income (loss)	(265)					(265)
Repurchase of common shares	(3,332)			(4)	(302)		(3,026)
Other changes, including employee plans	242				300		(58)
Cash dividends declared preferred		$ (57)						$ (57)
Cash dividends declared common	(1,568)						(1,568)
Ending Balance at Dec. 31, 2022	24,711		0	149	11,493	(3,210)	16,279
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,374						8,374
Other comprehensive income (loss)	138					138
Repurchase of common shares	(3,519)			(4)	(334)		(3,181)
Other changes, including employee plans	181				213		(32)
Cash dividends declared preferred		(58)						(58)
Cash dividends declared common	(1,770)						(1,770)
Ending Balance at Dec. 31, 2023	28,057		0	145	11,372	(3,072)	19,612
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	10,129						10,129
Other comprehensive income (loss)	(323)					(323)
Repurchase of common shares	(5,857)			(4)	(377)		(5,476)
Other changes, including employee plans	315				375		(60)
Cash dividends declared preferred		$ (58)						$ (58)
Cash dividends declared common	(1,999)						(1,999)
Ending Balance at Dec. 31, 2024	$ 30,264		$ 0	$ 141	$ 11,370	$ (3,395)	$ 22,148