Consolidated Balance Sheets (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and due from banks	$ 1,562	$ 1,127
Interest-bearing deposits with banks	2,646	931
Federal funds sold and securities purchased under resale agreements or similar arrangements	136	327
Segregated cash due from banks	20	309
Trading securities at fair value	534	633
Securities available for sale at fair value ($1,577 and $1,539 covered by FDIC loss share at December 31, 2011 and December 31, 2010, respectively)	22,313	23,169
Securities held to maturity (fair value of $14,098 at December 31, 2011)	14,094	0
Loans held for sale ($3,736 and $3,176 at fair value at December 31, 2011 and December 31, 2010, respectively)	3,736	3,697
Loans and leases ($4,867 and $6,194 covered by FDIC loss share at December 31, 2011 and December 31, 2010, respectively)	107,469	103,567
Allowance for loan and lease losses	(2,256)	(2,708)
Loans and leases, net of allowance for loan and lease losses	105,213	100,859
FDIC loss share receivable	1,100	1,922
Premises and equipment	1,855	1,840
Goodwill	6,078	6,008
Core deposit and other intangible assets	444	508
Residential mortgage servicing rights at fair value	563	830
Other assets ($415 and $360 of foreclosed property and other assets covered by FDIC loss share at December 31, 2011 and December 31, 2010, respectively)	14,285	14,921
Total assets	174,579	157,081
Deposits:
Noninterest-bearing deposits	25,684	20,637
Interest-bearing deposits	99,255	86,576
Total deposits	124,939	107,213
Federal funds purchased, securities sold under repurchase agreements and short-term borrowed funds	3,566	5,673
Long-term debt	21,803	21,730
Accounts payable and other liabilities	6,791	5,967
Total liabilities	157,099	140,583
Commitments and contingencies (Note 15)
Shareholders' equity:
Common stock, $5 par	3,486	3,472
Additional paid-in capital	5,873	5,776
Retained earnings	8,772	7,935
Accumulated other comprehensive loss, net of deferred income taxes	(713)	(747)
Noncontrolling interests	62	62
Total shareholders' equity	17,480	16,498
Total liabilities and shareholders' equity	$ 174,579	$ 157,081
Common shares outstanding	697,143	694,381
Common shares authorized	2,000,000	2,000,000
Preferred shares authorized	5,000	5,000