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 [Member]
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		112,367					362,174	(249,807)
Preferred stock cash dividends	[1]	(21,765)					(21,765)
Stock-based compensation transactions, net		37,869			(138)	(23,341)	(330)		61,678
Common stock cash dividends		(155,856)					(155,856)
Ending 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)
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		846,649					701,624	145,025
Preferred stock cash dividends	[1]	(24,941)					(24,941)
Purchases of treasury stock	[2]	(599,940)							(599,940)
Stock-based compensation transactions, net	[2]	55,508			(155)	(16,566)	(471)		72,700
Common stock cash dividends		(218,095)					(218,095)
Ending 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)

[1] For the three-month period ended March 31, 2023, dividends per preferred share were: Preferred Series E - $16.125; Preferred Series F - $128.125; Preferred Series Preferred Series G - $125.00; Preferred Series H - $0.3516; and Preferred Series I - $87.50. Dividends per preferred share for the three months ended March 31, 2022 were: Preferred Series E - $16.125; Preferred Series F - $128.125; Preferred Series Preferred Series G - $125.00; and Preferred Series I - $94.306.

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