Asset Quality and Allowances for Loan and Lease Losses and Unfunded Loan Commitments and Letters Of Credit (Consumer Real Estate Secured Higher Risk AND High LTVs) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2011		Dec. 31, 2010		Jun. 30, 2010
Total Loans	$ 150,319	[1],[2],[3],[4]	$ 150,595	[1],[2],[3],[4]	$ 154,342
Purchased impaired loans	7,256		7,780		9,127
Pennsylvania [Member] | Home Equity [Member]
Percentage Of Higher Risk Loans	30.00%		28.00%
Pennsylvania [Member] | Residential Real Estate [Member]
Percentage Of Higher Risk Loans	5.00%
Ohio [Member] | Home Equity [Member]
Percentage Of Higher Risk Loans	13.00%		13.00%
Ohio [Member] | Residential Real Estate [Member]
Percentage Of Higher Risk Loans	5.00%
Illinois [Member] | Home Equity [Member]
Percentage Of Higher Risk Loans	7.00%		7.00%
Illinois [Member] | Residential Real Estate [Member]
Percentage Of Higher Risk Loans	13.00%		11.00%
New Jersey [Member] | Home Equity [Member]
Percentage Of Higher Risk Loans	11.00%		11.00%
California [Member] | Residential Real Estate [Member]
Percentage Of Higher Risk Loans	23.00%		23.00%
Florida [Member] | Residential Real Estate [Member]
Percentage Of Higher Risk Loans	11.00%		11.00%
Michigan [Member] | Home Equity [Member]
Percentage Of Higher Risk Loans	6.00%		6.00%
Maryland [Member] | Residential Real Estate [Member]
Percentage Of Higher Risk Loans			8.00%
Kentucky [Member] | Home Equity [Member]
Percentage Of Higher Risk Loans			5.00%
Commercial [Member]
Total Loans	58,620		55,177
Purchased impaired loans	167		249
Residential Real Estate [Member]
Higher risk loans amount	538	[5],[6]	671	[5],[6]
Higher risk loans percentage of total loans	4.00%		4.00%
All other loans amount	14,444		15,328
All other loans percentage of total loans	96.00%		96.00%
Total Loans	14,982		15,999
Loans with LTV > 100% amount	1,066		1,331
Loans with LTV > 100% percentage of total loans	7.00%		8.00%
Percentage in some stage of delinquency	43.00%		49.00%
Percentage in late stage delinquency status	34.00%		38.00%
Purchased impaired loans	3,241		3,354
Home Equity [Member]
Higher risk loans amount	987	[5],[7]	1,203	[5],[7]
Higher risk loans percentage of total loans	3.00%		4.00%
All other loans amount	32,392		33,023
All other loans percentage of total loans	97.00%		96.00%
Total Loans	33,379		34,226
Loans with LTV > 100% amount	262		285
Loans with LTV > 100% percentage of total loans	1.00%		1.00%
Percentage in some stage of delinquency	11.00%		10.00%
Percentage in late stage delinquency status	6.00%		6.00%
Purchased impaired loans	2,893		3,020
Total consumer real estate secured loans [Member]
Higher risk loans amount	1,525	[5],[8]	1,874	[5],[8]
Higher risk loans percentage of total loans	3.00%		4.00%
All other loans amount	46,836	[8]	48,351	[8]
All other loans percentage of total loans	97.00%		96.00%
Total Loans	48,361	[8]	50,225	[8]
Loans with LTV > 100% amount	1,328		1,616
Loans with LTV > 100% percentage of total loans	3.00%		3.00%
Purchased impaired loans	$ 6,100		$ 6,400

[1] Amounts represent items for which the Corporation has elected the fair value option.

[2] Amounts represent the assets or liabilities of consolidated variable interest entities (VIEs).

[3] Future accretable yield related to purchased impaired loans is not included in loans outstanding.

[4] Net of unearned income, net deferred loan fees, unamortized discounts and premiums, and purchase discounts and premiums totaling $2.5 billion and $2.7 billion atJune 30, 2011 and December 31, 2010, respectively.

[5] Higher risk loans are defined as loans with both a recent FICO credit score of less than or equal to 660 and a LTV ratio greater than or equal to 90%. Higher risk loansexclude loans held for sale and government insured or guaranteed loans.

[6] Within the higher risk residential real estate class at June 30, 2011, approximately 43% were in some stage of delinquency and 34% were in late stage (90+ days)delinquency status. The majority of the June 30, 2011 balance related to higher risk residential real estate loans is geographically distributed throughout the following areas: California 23%, Illinois 13%, Florida 11%, Ohio 5%, and Pennsylvania 5%. All other states, none of which comprise more than 4%, make up the remainder of the balance. At December 31, 2010, approximately 49% were in some stage of delinquency and 38% were in late stage (90+ days) delinquency status. The majority of the December 31, 2010 balance related to higher risk residential real estate loans is geographically distributed throughout the following areas: California 23%, Florida 11%,Illinois 11%, and Maryland 8%. All other states, none of which comprise more than 5%, make up the remainder of the balance.

[7] Within the higher risk home equity class at June 30, 2011, approximately 11% were in some stage of delinquency and 6% were in late stage (90+ days) delinquency status.The majority of the June 30, 2011 balance related to higher risk home equity loans is geographically distributed throughout the following areas: Pennsylvania 30%, Ohio 13%, New Jersey 11%, Illinois 7%, and Michigan 6%. All other states, none of which comprise more than 5%, make up the remainder of the balance.At December 31, 2010, approximately 10% were in some stage of delinquency and 6% were in late stage (90+ days) delinquency status. The majority of the December 31, 2010 balance related to higher risk home equity loans is geographically distributed throughout the following areas: Pennsylvania 28%, Ohio 13%, New Jersey 11%, Illinois7%, Michigan 6%, and Kentucky 5%. All other states, none of which comprise more than 4% make up the remainder of the balance.

[8] Total loans include purchased impaired loans of $6.1 billion at June 30, 2011 and $6.4 billion at December 31, 2010.