Consolidated Balance Sheets (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Assets
Cash and due from banks	$ 1,322	$ 1,972
Interest-bearing deposits with banks	1,588	1,659
Federal funds sold and securities purchased under resale agreements or similar arrangements	302	122
Segregated cash due from banks	2	36
Trading securities at fair value	627	497
AFS securities at fair value ($1,583 and $1,591 covered by FDIC loss share at March 31, 2013 and December 31, 2012, respectively)	24,170	25,137
HTM securities (fair value of $13,295 and $13,848 at March 31, 2013 and December 31, 2012, respectively)	13,119	13,594
LHFS at fair value	3,432	3,761
Loans and leases ($3,005 and $3,294 covered by FDIC loss share at March 31, 2013 and December 31, 2012, respectively)	114,196	114,603
ALLL	(1,975)	(2,018)
Loans and leases, net of ALLL	112,221	112,585
FDIC loss share receivable	368	479
Premises and equipment	1,880	1,888
Goodwill	6,823	6,804
Core deposit and other intangible assets	647	673
Residential MSRs at fair value	735	627
Other assets ($272 and $297 of foreclosed property and other assets covered by FDIC loss share at March 31, 2013 and December 31, 2012, respectively)	13,601	14,038
Total assets	180,837	183,872
Deposits
Noninterest-bearing deposits	33,236	32,452
Interest-bearing deposits	98,116	100,623
Total deposits	131,352	133,075
Short-term borrowings	3,239	2,864
Long-term debt	18,316	19,114
Accounts payable and other liabilities	6,701	7,596
Total liabilities	159,608	162,649
Commitments and contingencies (Note 13)
Shareholders' equity
Preferred stock, $5 par, liquidation preference of $25,000 per share	2,116	2,116
Common stock, $5 par	3,507	3,499
Additional paid-in capital	5,975	5,973
Retained earnings	10,178	10,129
AOCI, net of deferred income taxes	(612)	(559)
Noncontrolling interests	65	65
Total shareholders' equity	21,229	21,223
Total liabilities and shareholders' equity	$ 180,837	$ 183,872
Common shares outstanding	701,440	699,728
Common shares authorized	2,000,000	2,000,000
Preferred shares outstanding	87	87
Preferred shares authorized	5,000	5,000