Asset Quality and Allowances for Loan and Lease Losses and Unfunded Loan Commitments and Letters Of Credit (Originated Impaired Loans) (Details) (USD $) In Millions	Jun. 30, 2011		Dec. 31, 2010
Specific reserves in ALLL for the TDR portfolio	$ 577		$ 509
Commercial [Member] | Originated Impaired Loans With An Associated Allowance [Member]
Unpaid Principal Balance	1,309		1,769
Recorded Investment	925	[1]	1,178	[1]
Associated Allowance	317	[2]	410	[2]
Average Recorded Investment	1,079	[1]	1,533	[1]
Commercial [Member] | Originated Impaired Loans Without An Associated Allowance [Member]
Unpaid Principal Balance	238		87
Recorded Investment	121	[1]	75	[1]
Average Recorded Investment	89	[1]	90	[1]
Commercial Real Estate [Member] | Originated Impaired Loans With An Associated Allowance [Member]
Unpaid Principal Balance	1,698		1,927
Recorded Investment	1,224	[1]	1,446	[1]
Associated Allowance	415	[2]	449	[2]
Average Recorded Investment	1,386	[1]	1,732	[1]
Commercial Real Estate [Member] | Originated Impaired Loans Without An Associated Allowance [Member]
Unpaid Principal Balance	668		525
Recorded Investment	480	[1]	389	[1]
Average Recorded Investment	428	[1]	320	[1]
Home Equity [Member] | Originated Impaired Loans With An Associated Allowance [Member]
Unpaid Principal Balance	751		622
Recorded Investment	716	[1]	622	[1]
Associated Allowance	267	[2]	207	[2]
Average Recorded Investment	670	[1]	448	[1]
Credit Card [Member] | Originated Impaired Loans With An Associated Allowance [Member]
Unpaid Principal Balance	289		301
Recorded Investment	289	[1]	301	[1]
Associated Allowance	75	[2]	149	[2]
Average Recorded Investment	292	[1]	275	[1]
Other Consumer [Member] | Originated Impaired Loans With An Associated Allowance [Member]
Unpaid Principal Balance	39		34
Recorded Investment	39	[1]	34	[1]
Associated Allowance	6	[2]	7	[2]
Average Recorded Investment	35	[1]	30	[1]
Residential Real Estate [Member] | Originated Impaired Loans With An Associated Allowance [Member]
Unpaid Principal Balance	630		521
Recorded Investment	570	[1]	465	[1]
Associated Allowance	202	[2]	122	[2]
Average Recorded Investment	540	[1]	309	[1]
Originated Impaired Loans With An Associated Allowance [Member]
Unpaid Principal Balance	4,716		5,174
Recorded Investment	3,763	[1]	4,046	[1]
Associated Allowance	1,282	[2]	1,344	[2]
Average Recorded Investment	4,002	[1]	4,327	[1]
Originated Impaired Loans Without An Associated Allowance [Member]
Unpaid Principal Balance	906		612
Recorded Investment	601	[1]	464	[1]
Average Recorded Investment	517	[1]	410	[1]
Total Originated Impaired Loans [Member]
Unpaid Principal Balance	5,622		5,786
Recorded Investment	4,364	[1]	4,510	[1]
Associated Allowance	1,282	[2]	1,344	[2]
Average Recorded Investment	$ 4,519	[1]	$ 4,737	[1]

[1] Recorded investment in a loan includes the unpaid principal balance plus accrued interest and net accounting adjustments, less any charge-offs. Recorded investment does not include any associated valuation allowance. Average recorded investment is for the six months ended June 30, 2011, and year ended December 31, 2010.

[2] Associated allowance amounts include $577 million and $509 million for TDRs at June 30, 2011, and December 31, 2010, respectively.