Consolidated Statement of Changes in Shareholders' Equity - USD ($) $ in Thousands		Total		Preferred Stock [Member]	Common Stock [Member]	Common Stock Issuable [Member]		Additional Paid-in Capital [Member]		Retained Earnings [Member]		Accumulated Other Comprehensive Income (Loss), Net [Member]	Treasury Stock
Beginning 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		200,784								579,696		(378,912)
Common stock issued		8,286,515			9,824			3,256,821					5,019,870
Common stock awards converted		104,810						104,810
Conversion of Series H preferred stock		260,600		260,600
Preferred stock cash dividends	[1]	(46,706)								(46,706)
Purchases of treasury stock		(600,000)											(600,000)
Stock-based compensation transactions, net		55,281	[2]		23	(122)	[2]	(9,750)	[2]	(643)	[2]		65,773	[2]
Common stock cash dividends		(370,158)								(370,158)
Ending balance at Jun. 30, 2022		25,794,531		2,010,600	89,718	1,090		9,986,881		14,808,637		(506,490)	(595,905)
Beginning balance at Mar. 31, 2022		17,876,020		1,750,000	79,871	1,074		6,611,659		14,830,671		(377,385)	(5,019,870)
Total comprehensive income		88,417								217,522		(129,105)
Common stock issued		8,286,515			9,824			3,256,821					5,019,870
Common stock awards converted		104,810						104,810
Conversion of Series H preferred stock		260,600		260,600
Preferred stock cash dividends	[1]	(24,941)								(24,941)
Purchases of treasury stock	[2]	(600,000)											(600,000)
Stock-based compensation transactions, net		17,412			23	16		13,591		(313)			4,095
Common stock cash dividends		(214,302)								(214,302)
Ending balance at Jun. 30, 2022		25,794,531		2,010,600	89,718	1,090		9,986,881		14,808,637		(506,490)	(595,905)
Beginning 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)
Total comprehensive income		1,493,888								1,568,658		(74,770)
Preferred stock cash dividends	[1]	(49,881)								(49,881)
Purchases of treasury stock	[2]	(599,940)											(599,940)
Stock-based compensation transactions, net	[2]	73,875				(140)		(2,556)		(946)			77,517
Common stock cash dividends		(434,999)								(434,999)
Ending balance at Jun. 30, 2023		25,800,933		2,010,600	89,718	972		10,000,335		16,836,810		(864,800)	(2,272,702)
Beginning balance at Mar. 31, 2023		25,377,171		2,010,600	89,718	957		9,986,325		16,212,095		(645,005)	(2,277,519)
Total comprehensive income		647,239								867,034		(219,795)
Preferred stock cash dividends	[1]	(24,940)								(24,940)
Stock-based compensation transactions, net	[2]	18,367				15		14,010		(475)			4,817
Common stock cash dividends		(216,904)								(216,904)
Ending balance at Jun. 30, 2023		$ 25,800,933		$ 2,010,600	$ 89,718	$ 972		$ 10,000,335		$ 16,836,810		$ (864,800)	$ (2,272,702)

[1] For the three-month and six-month periods ended June 30, 2023, dividends per preferred share were: Preferred Series E - $16.125 and $32.25, respectively; Preferred Series F - $128.125 and $256.25, respectively; Preferred Series G - $125.00 and $250.00, respectively; Preferred Series H - $0.3516 and $0.7031, respectively; and Preferred Series I - $87.50 and $175.00, respectively. Dividends per preferred share for the three-month and six-month periods ended June 30, 2022 were: Preferred Series E - $16.125 and $32.25, respectively; Preferred Series F - $128.125 and $256.25, respectively; Preferred Series G - $125.00 and $250.00, respectively; and Preferred Series I - $87.50. and $181.81, respectively.

[2] Effective January 1, 2023 amounts are inclusive of 1% U.S. government excise taxes receivable or payable.