Consolidated Statement of Changes in Shareholders' Equity - USD ($) $ in Millions	Total	Series E Preferred Stock	Series J Preferred Stock	Series H Preferred Stock	Preferred Stock	Preferred Stock Series E Preferred Stock	Preferred Stock Series J Preferred Stock	Preferred Stock Series H Preferred Stock	Common Stock	Common Stock Issuable	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss), Net	Treasury Stock
Beginning balance at Dec. 31, 2021	$ 17,903				$ 1,750				$ 80	$ 1	$ 6,635	$ 14,646	$ (127)	$ (5,082)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	1,329											1,992	(663)
Common stock issued	8,286								10		3,256			5,020
Common stock awards converted	105										105
Conversion of preferred stock				$ 261				$ 261
Preferred stock cash dividends	(97)											(97)
Purchases of treasury stock	(1,800)													(1,800)
Stock-based compensation transactions, net	117										6	(1)		112
Common stock cash dividends	(786)											(786)
Ending balance at Dec. 31, 2022	25,318				2,011				90	1	10,002	15,754	(790)	(1,750)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	3,072											2,741	331
Preferred stock cash dividends	(100)											(100)
Purchases of treasury stock	(600)													(600)
Stock-based compensation transactions, net	136										18	(2)		120
Common stock cash dividends	(869)											(869)
Ending balance at Dec. 31, 2023	26,957				2,011				90	1	10,020	17,524	(459)	(2,230)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	2,883											2,588	295
Conversion of preferred stock			$ 733				$ 733
Redemption of Series E preferred stock		$ (350)				$ (350)
Preferred stock cash dividends	(134)											(134)
Purchases of treasury stock	(400)													(400)
Stock-based compensation transactions, net	235										(22)	(2)		259
Common stock cash dividends	(897)											(897)
Ending balance at Dec. 31, 2024	$ 29,027				$ 2,394				$ 90	$ 1	$ 9,998	$ 19,079	$ (164)	$ (2,371)