Consolidated Balance Sheets (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$ 1,557	$ 1,562
Interest-bearing deposits with banks	1,784	2,646
Federal funds sold and securities purchased under resale agreements or similar arrangements	162	136
Segregated cash due from banks	3	20
Trading securities at fair value	572	534
Securities available for sale at fair value ($1,581 and $1,577 covered by FDIC loss share at September 30, 2012 and December 31, 2011, respectively)	24,098	22,313
Securities held to maturity (fair value of $13,445 and $14,098 at September 30, 2012 and December 31, 2011, respectively)	13,140	14,094
Loans held for sale at fair value	3,467	3,736
Loans and leases ($3,688 and $4,867 covered by FDIC loss share at September 30, 2012 and December 31, 2011, respectively)	114,140	107,469
Allowance for loan and lease losses	(2,051)	(2,256)
Loans and leases, net of allowance for loan and lease losses	112,089	105,213
FDIC loss share receivable	656	1,100
Premises and equipment	1,940	1,855
Goodwill	6,718	6,078
Core deposit and other intangible assets	718	444
Residential mortgage servicing rights at fair value	563	563
Other assets ($327 and $415 of foreclosed property and other assets covered by FDIC loss share at September 30, 2012 and December 31, 2011, respectively)	14,554	14,285
Total assets	182,021	174,579
Liabilities
Noninterest-bearing deposits	30,810	25,684
Interest-bearing deposits	99,208	99,255
Total deposits	130,018	124,939
Federal funds purchased, securities sold under repurchase agreements and short-term borrowed funds	3,093	3,566
Long-term debt	19,221	21,803
Accounts payable and other liabilities	9,157	6,791
Total liabilities	161,489	157,099
Commitments and contingencies (Note 13)
Shareholders' equity
Preferred stock, liquidation preference of $25,000 per share	1,679	0
Common stock, $5 par	3,498	3,486
Additional paid-in capital	5,950	5,873
Retained earnings	9,761	8,772
Accumulated other comprehensive loss, net of deferred income taxes	(409)	(713)
Noncontrolling interests	53	62
Total shareholders' equity	20,532	17,480
Total liabilities and shareholders' equity	$ 182,021	$ 174,579
Common shares outstanding	699,541	697,143
Common shares authorized	2,000,000	2,000,000
Preferred shares outstanding	69	0
Preferred shares authorized	5,000	5,000