Consolidated Balance Sheets (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$ 1,409	$ 1,562
Interest-bearing deposits with banks	2,246	2,646
Federal funds sold and securities purchased under resale agreements or similar arrangements	212	136
Segregated cash due from banks	4	20
Trading securities at fair value	533	534
Securities available for sale at fair value ($1,578 and $1,577 covered by FDIC loss share at June 30, 2012 and December 31, 2011, respectively)	25,067	22,313
Securities held to maturity (fair value of $12,744 and $14,098 at June 30, 2012 and December 31, 2011, respectively)	12,576	14,094
Loans held for sale at fair value	2,736	3,736
Loans and leases ($3,955 and $4,867 covered by FDIC loss share at June 30, 2012 and December 31, 2011, respectively)	111,075	107,469
Allowance for loan and lease losses	(2,126)	(2,256)
Loans and leases, net of allowance for loan and lease losses	108,949	105,213
FDIC loss share receivable	831	1,100
Premises and equipment	1,816	1,855
Goodwill	6,428	6,078
Core deposit and other intangible assets	683	444
Residential mortgage servicing rights at fair value	578	563
Other assets ($349 and $415 of foreclosed property and other assets covered by FDIC loss share at June 30, 2012 and December 31, 2011, respectively)	14,461	14,285
Total assets	178,529	174,579
Liabilities
Noninterest-bearing deposits	28,664	25,684
Interest-bearing deposits	97,395	99,255
Total deposits	126,059	124,939
Federal funds purchased, securities sold under repurchase agreements and short-term borrowed funds	3,196	3,566
Long-term debt	22,561	21,803
Accounts payable and other liabilities	7,787	6,791
Total liabilities	159,603	157,099
Commitments and contingencies (Note 13)
Shareholders' equity
Preferred stock, liquidation preference of $25,000 per share	559	0
Common stock, $5 par	3,494	3,486
Additional paid-in capital	5,914	5,873
Retained earnings	9,433	8,772
Accumulated other comprehensive loss, net of deferred income taxes	(541)	(713)
Noncontrolling interests	67	62
Total shareholders' equity	18,926	17,480
Total liabilities and shareholders' equity	$ 178,529	$ 174,579
Common shares outstanding	698,795	697,143
Common shares authorized	2,000,000	2,000,000
Preferred shares outstanding	23	0
Preferred shares authorized	5,000	5,000