Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and due from banks	$ 1,082,186	$ 1,224,350
Money market investments:
Interest-bearing deposits	7,629,399	7,020,895
Federal funds sold and security resell agreements	52,634	102,159
Investment securities:
Held-to-maturity, at adjusted cost (approximate fair value $728,479 and $729,974)	797,149	807,804
Available-for-sale, at fair value	3,223,086	3,230,795
Trading account, at fair value	19,033	40,273
Marketable securities, total	4,039,268	4,078,872
Loans held for sale	184,579	201,590
Loans, net of unearned income and fees:
Loans and leases	35,903,475	36,393,782
FDIC-supported loans	687,126	750,870
Total loans, net of unearned	36,590,601	37,144,652
Less allowance for loan losses	1,010,059	1,049,958
Loans, net of allowance	35,580,542	36,094,694
Other noninterest-bearing investments	875,037	865,231
Premises and equipment, net	715,815	719,276
Goodwill	1,015,129	1,015,129
Core deposit and other intangibles	63,538	67,830
Other real estate owned	158,592	153,178
Other assets	1,499,588	1,605,905
Total assets	52,896,307	53,149,109
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing demand	16,185,140	16,110,857
Interest-bearing:
Savings and NOW	7,406,910	7,159,101
Money market	14,813,495	14,616,740
Time	3,326,717	3,413,550
Foreign	1,366,826	1,575,361
Total deposits	43,099,088	42,875,609
Securities sold, not yet purchased	47,404	44,486
Federal funds purchased and security repurchase agreements	486,808	608,098
Other short-term borrowings	19,839	70,273
Long-term debt	2,283,121	1,954,462
Reserve for unfunded lending commitments	98,718	102,422
Other liabilities	474,551	510,531
Total liabilities	46,509,529	46,165,881
Shareholders' equity:
Preferred stock, without par value, authorized 4,400,000 shares	1,737,633	2,377,560
Common stock, without par value; authorized 350,000,000 shares; issued and outstanding 184,228,178 and 184,135,388 shares	4,162,522	4,163,242
Retained earnings	1,060,525	1,036,590
Accumulated other comprehensive income (loss)	(571,567)	(592,084)
Controlling interest shareholders' equity	6,389,113	6,985,308
Noncontrolling interests	(2,335)	(2,080)
Total shareholders' equity	6,386,778	6,983,228
Total liabilities and shareholders' equity	$ 52,896,307	$ 53,149,109