CONSOLIDATED BALANCE SHEET (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Assets
Cash and due from banks	$ 1,671,052	$ 1,573,361
Interest-bearing deposits at banks	3,299,185	1,651,138
Federal funds sold	92,066	99,573
Trading account	314,807	376,131
Investment securities (includes pledged securities that can be sold or repledged of $1,657,883 at March 31, 2014; $1,696,438 at December 31, 2013)
Available for sale (cost: $6,042,063 at March 31, 2014; $4,444,365 at December 31, 2013)	6,191,571	4,531,786
Held to maturity (fair value: $3,814,766 at March 31, 2014; $3,860,127 at December 31, 2013)	3,873,985	3,966,130
Other (fair value: $298,693 at March 31, 2014; $298,581 at December 31, 2013)	298,693	298,581
Total investment securities	10,364,249	8,796,497
Loans and leases	64,378,511	64,325,783
Unearned discount	(243,433)	(252,624)
Loans and leases, net of unearned discount	64,135,078	64,073,159
Allowance for credit losses	(916,768)	(916,676)
Loans and leases, net	63,218,310	63,156,483
Premises and equipment	627,966	633,520
Goodwill	3,524,625	3,524,625
Core deposit and other intangible assets	58,789	68,851
Accrued interest and other assets	5,359,311	5,282,212
Total assets	88,530,360	85,162,391
Liabilities
Noninterest-bearing deposits	25,244,200	24,661,007
NOW accounts	1,917,763	1,989,441
Savings deposits	37,887,008	36,621,580
Time deposits	3,402,515	3,523,838
Deposits at Cayman Islands office	247,880	322,746
Total deposits	68,699,366	67,118,612
Federal funds purchased and agreements to repurchase securities	230,209	260,455
Accrued interest and other liabilities	1,462,725	1,368,922
Long-term borrowings	6,251,197	5,108,870
Total liabilities	76,643,497	73,856,859
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, 2014; 381,500 shares at December 31, 2013; Liquidation preference of $10,000 per share: 50,000 shares at March 31, 2014 and December 31, 2013	1,231,500	881,500
Common stock, $.50 par, 250,000,000 shares authorized, 131,388,585 shares issued at March 31, 2014; 130,516,364 shares issued at December 31, 2013	65,694	65,258
Common stock issuable, 42,100 shares at March 31, 2014; 47,231 shares at December 31, 2013	2,616	2,915
Additional paid-in capital	3,302,402	3,232,014
Retained earnings	7,309,912	7,188,004
Accumulated other comprehensive income (loss), net	(25,261)	(64,159)
Total shareholders' equity	11,886,863	11,305,532
Total liabilities and shareholders' equity	$ 88,530,360	$ 85,162,391