Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets
Cash and due from banks	$ 1,411,460	$ 1,337,577
Interest-bearing deposits at banks	36,025,382	41,872,304
Trading account	197,558	468,031
Investment securities (includes pledged securities that can be sold or repledged of $85,493 at March 31, 2022; $96,128 at December 31, 2021)
Available for sale (cost: $5,783,697 at March 31, 2022; $3,849,347 at December 31, 2021)	5,705,199	3,955,804
Held to maturity (fair value: $3,042,709 at March 31, 2022; $2,771,290 at December 31, 2021)	3,180,626	2,734,674
Equity and other securities (cost: $467,884 at March 31, 2022; $461,516 at December 31, 2021)	471,007	465,382
Total investment securities	9,356,832	7,155,860
Loans and leases	92,004,751	93,136,678
Unearned discount	(196,359)	(224,226)
Loans and leases, net of unearned discount	91,808,392	92,912,452
Allowance for credit losses	(1,472,359)	(1,469,226)
Loans and leases, net	90,336,033	91,443,226
Premises and equipment	1,134,718	1,144,765
Goodwill	4,593,112	4,593,112
Core deposit and other intangible assets	2,742	3,998
Accrued interest and other assets	6,805,715	7,088,287
Total assets	149,863,552	155,107,160
Liabilities
Noninterest-bearing deposits	58,520,366	60,131,480
Savings and interest-checking deposits	65,273,150	68,603,966
Time deposits	2,525,197	2,807,963
Total deposits	126,318,713	131,543,409
Short-term borrowings	50,307	47,046
Accrued interest and other liabilities	2,174,925	2,127,931
Long-term borrowings	3,443,587	3,485,369
Total liabilities	131,987,532	137,203,755
Shareholders' equity
Preferred stock, $1.00 par, 1,000,000 shares authorized; Issued and outstanding: Liquidation preference of $1,000 per share: 350,000 shares at March 31, 2022 and December 31, 2021; Liquidation preference of $10,000 per share: 140,000 shares at March 31, 2022 and December 31, 2021	1,750,000	1,750,000
Common stock, $.50 par, 250,000,000 shares authorized, 159,741,898 shares issued at March 31, 2022 and December 31, 2021	79,871	79,871
Common stock issuable, 13,864 shares at March 31, 2022; 15,769 shares at December 31, 2021	1,074	1,212
Additional paid-in capital	6,611,659	6,635,000
Retained earnings	14,830,671	14,646,448
Accumulated other comprehensive income (loss), net	(377,385)	(127,578)
Treasury stock — common, at cost — 30,675,930 shares at March 31, 2022; 31,052,845 shares at December 31, 2021	(5,019,870)	(5,081,548)
Total shareholders’ equity	17,876,020	17,903,405
Total liabilities and shareholders’ equity	$ 149,863,552	$ 155,107,160