CONSOLIDATED BALANCE SHEET (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Assets
Cash and due from banks	$ 1,231,091	$ 1,983,615
Interest-bearing deposits at banks	1,304,770	129,945
Federal funds sold	594,976	3,000
Trading account	420,144	488,966
Investment securities (includes pledged securities that can be sold or repledged of $1,761,978 at March 31, 2013; $1,801,842 at December 31, 2012)
Available for sale (cost: $4,288,994 at March 31, 2013; $4,643,070 at December 31, 2012)	4,400,742	4,739,437
Held to maturity (fair value: $910,783 at March 31, 2013; $976,883 at December 31, 2012)	959,199	1,032,276
Other (fair value: $300,890 at March 31, 2013; $302,648 at December 31, 2012)	300,890	302,648
Total investment securities	5,660,831	6,074,361
Loans and leases	66,139,206	66,790,186
Unearned discount	(214,939)	(219,229)
Loans and leases, net of unearned discount	65,924,267	66,570,957
Allowance for credit losses	(927,117)	(925,860)
Loans and leases, net	64,997,150	65,645,097
Premises and equipment	589,570	594,652
Goodwill	3,524,625	3,524,625
Core deposit and other intangible assets	102,420	115,763
Accrued interest and other assets	4,386,380	4,448,779
Total assets	82,811,957	83,008,803
Liabilities
Noninterest-bearing deposits	23,603,971	24,240,802
NOW accounts	1,891,621	1,979,619
Savings deposits	35,024,025	33,783,947
Time deposits	4,304,033	4,562,366
Deposits at Cayman Islands office	266,076	1,044,519
Total deposits	65,089,726	65,611,253
Federal funds purchased and agreements to repurchase securities	374,593	1,074,482
Accrued interest and other liabilities	1,530,118	1,512,717
Long-term borrowings	5,394,563	4,607,758
Total liabilities	72,389,000	72,806,210
Shareholders' equity
Preferred stock, $1.00 par, 1,000,000 shares authorized; Issued and outstanding: Liquidation preference of $1,000 per share: 381,500 shares at March 31, 2013 and December 31, 2012; Liquidation preference of $10,000 per share: 50,000 shares at March 31, 2013 and December 31, 2012	874,627	872,500
Common stock, $.50 par, 250,000,000 shares authorized, 128,952,578 shares issued at March 31, 2013; 128,176,912 shares issued at December 31, 2012	64,476	64,088
Common stock issuable, 46,552 shares at March 31, 2013; 57,409 shares at December 31, 2012	2,829	3,473
Additional paid-in capital	3,061,783	3,025,520
Retained earnings	6,645,195	6,477,276
Accumulated other comprehensive income (loss), net	(225,953)	(240,264)
Total shareholders' equity	10,422,957	10,202,593
Total liabilities and shareholders' equity	$ 82,811,957	$ 83,008,803