Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 1,178,175	$ 1,368,040
Interest-bearing deposits at banks	9,545,181	7,594,350
Trading account	467,987	273,783
Investment securities (includes pledged securities that can be sold or repledged of $2,133,492 at March 31, 2016; $2,136,712 at December 31, 2015)
Available for sale (cost: $11,937,326 at March 31, 2016; $12,138,636 at December 31, 2015)	12,200,647	12,242,671
Held to maturity (fair value: $2,769,343 at March 31, 2016; $2,864,147 at December 31, 2015)	2,730,611	2,859,709
Other (fair value: $536,062 at March 31, 2016; $554,059 at December 31, 2015)	536,062	554,059
Total investment securities	15,467,320	15,656,439
Loans and leases	88,104,830	87,719,234
Unearned discount	(232,364)	(229,735)
Loans and leases, net of unearned discount	87,872,466	87,489,499
Allowance for credit losses	(962,752)	(955,992)
Loans and leases, net	86,909,714	86,533,507
Premises and equipment	662,891	666,682
Goodwill	4,593,112	4,593,112
Core deposit and other intangible assets	127,949	140,268
Accrued interest and other assets	5,673,303	5,961,703
Total assets	124,625,632	122,787,884
Liabilities
Noninterest-bearing deposits	29,709,218	29,110,635
Interest-checking deposits	2,848,126	2,939,274
Savings deposits	48,649,114	46,627,370
Time deposits	12,841,331	13,110,392
Deposits at Cayman Islands office	166,787	170,170
Total deposits	94,214,576	91,957,841
Federal funds purchased and agreements to repurchase securities	206,709	150,546
Other short-term borrowings	1,560,117	1,981,636
Accrued interest and other liabilities	1,948,142	1,870,714
Long-term borrowings	10,341,035	10,653,858
Total liabilities	108,270,579	106,614,595
Shareholders' equity
Preferred stock, $1.00 par, 1,000,000 shares authorized; Issued and outstanding: Liquidation preference of $1,000 per share: 731,500 shares at March 31, 2016 and December 31, 2015; Liquidation preference of $10,000 per share: 50,000 shares at March 31, 2016 and December 31, 2015	1,231,500	1,231,500
Common stock, $.50 par, 250,000,000 shares authorized, 159,963,737 shares issued at March 31, 2016; 159,563,512 shares issued at December 31, 2015	79,982	79,782
Common stock issuable, 33,391 shares at March 31, 2016; 36,644 shares at December 31, 2015	2,180	2,364
Additional paid-in capital	6,683,499	6,680,768
Retained earnings	8,596,752	8,430,502
Accumulated other comprehensive income (loss), net	(150,189)	(251,627)
Treasury stock - common, at cost - 841,082 shares at March 31, 2016	(88,671)
Total shareholders' equity	16,355,053	16,173,289
Total liabilities and shareholders' equity	$ 124,625,632	$ 122,787,884