Consolidated Balance Sheet (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$ 1,983,615	$ 1,449,547
Interest-bearing deposits at banks	129,945	154,960
Federal funds sold	3,000	2,850
Trading account	488,966	561,834
Investment securities (includes pledged securities that can be sold or repledged of $1,801,842 at December 31, 2012; $1,826,011 at December 31, 2011)
Available for sale (cost: $4,643,070 at December 31, 2012; $6,312,423 at December 31, 2011)	4,739,437	6,228,560
Held to maturity (fair value: $976,883 at December 31, 2012; $1,012,562 at December 31, 2011)	1,032,276	1,077,708
Other (fair value: $302,648 at December 31, 2012; $366,886 at December 31, 2011)	302,648	366,886
Total investment securities	6,074,361	7,673,154
Loans and leases	66,790,186	60,377,875
Unearned discount	(219,229)	(281,870)
Loans and leases, net of unearned discount	66,570,957	60,096,005
Allowance for credit losses	(925,860)	(908,290)
Loans and leases, net	65,645,097	59,187,715
Premises and equipment	594,652	581,435
Goodwill	3,524,625	3,524,625
Core deposit and other intangible assets	115,763	176,394
Accrued interest and other assets	4,448,779	4,611,773
Total assets	83,008,803	77,924,287
Liabilities
Noninterest-bearing deposits	24,240,802	20,017,883
NOW accounts	1,979,619	1,912,226
Savings deposits	33,783,947	31,001,083
Time deposits	4,562,366	6,107,530
Deposits at Cayman Islands office	1,044,519	355,927
Total deposits	65,611,253	59,394,649
Federal funds purchased and agreements to repurchase securities	1,074,482	732,059
Other Short-term borrowings		50,023
Accrued interest and other liabilities	1,512,717	1,790,121
Long-term borrowings	4,607,758	6,686,226
Total liabilities	72,806,210	68,653,078
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 December 31, 2012 and December 31, 2011; Liquidation preference of $10,000 per share: 50,000 shares at December 31, 2012 and December 31, 2011	872,500	864,585
Common stock, $.50 par, 250,000,000 shares authorized, 128,176,912 shares issued at December 31, 2012; 125,683,398 shares issued at December 31, 2011	64,088	62,842
Common stock issuable, 57,409 shares at December 31, 2012; 68,220 shares at December 31, 2011 .	3,473	4,072
Additional paid-in capital	3,025,520	2,828,986
Retained earnings	6,477,276	5,867,165
Accumulated other comprehensive income (loss), net	(240,264)	(356,441)
Total shareholders' equity	10,202,593	9,271,209
Total liabilities and shareholders' equity	$ 83,008,803	$ 77,924,287