Consolidated Statement of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	ASU 2016-13 [Member]	Series I Preferred Stock [Member]	Series H Preferred Stock [Member]	Preferred Stock [Member]	Preferred Stock [Member] Series I Preferred Stock [Member]	Preferred Stock [Member] Series H Preferred Stock [Member]	Common Stock [Member]	Common Stock Issuable [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Series I Preferred Stock [Member]	Retained Earnings [Member]	Retained Earnings [Member] ASU 2016-13 [Member]	Accumulated Other Comprehensive Income (Loss), Net [Member]	Treasury Stock [Member]
Beginning balance at Dec. 31, 2019	$ 15,716,649				$ 1,250,000			$ 79,871	$ 1,566	$ 6,593,539		$ 12,820,916		$ (206,680)	$ (4,822,563)
Cumulative effect of change in accounting principle — credit losses		$ (91,925)											$ (91,925)
Total comprehensive income	1,496,800											1,353,152		143,648
Preferred stock cash dividends	(68,228)											(68,228)
Purchases of treasury stock	(373,750)														(373,750)
Stock-based compensation transactions, net	76,813								(222)	23,865		(411)			53,581
Common stock cash dividends	(569,076)											(569,076)
Ending balance at Dec. 31, 2020	16,187,283				1,250,000			79,871	1,344	6,617,404		13,444,428		(63,032)	(5,142,732)
Total comprehensive income	1,794,200											1,858,746		(64,546)
Preferred stock cash dividends	(72,915)											(72,915)
Issuance of preferred stock			$ 495,000			$ 500,000					$ (5,000)
Stock-based compensation transactions, net	82,804								(132)	22,596		(844)			61,184
Common stock cash dividends	(582,967)											(582,967)
Ending balance at Dec. 31, 2021	17,903,405				1,750,000			79,871	1,212	6,635,000		14,646,448		(127,578)	(5,081,548)
Total comprehensive income	1,329,211											1,991,663		(662,452)
Common stock issued	8,286,515							9,824		3,256,821					5,019,870
Common stock awards converted	104,810									104,810
Preferred stock cash dividends	(96,587)											(96,587)
Issuance of preferred stock				$ 260,600			$ 260,600
Purchases of treasury stock	(1,800,000)														(1,800,000)
Stock-based compensation transactions, net	116,281							23	(100)	6,260		(1,301)			111,399
Common stock cash dividends	(786,245)											(786,245)
Ending balance at Dec. 31, 2022	$ 25,317,990				$ 2,010,600			$ 89,718	$ 1,112	$ 10,002,891		$ 15,753,978		$ (790,030)	$ (1,750,279)