Loans And The Allowance For Credit Losses (Schedule Of Loan Portfolio, Net Of Unearned Income) (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Loans [Line Items]
Commercial and industrial	$ 25,990	$ 24,522
Commercial real estate mortgage owner occupied	10,626	11,166
Commercial real estate construction owner occupied	261	337
Total commercial	36,877	36,025
Commercial investor real estate mortgage	8,598	9,702
Commercial investor real estate construction	849	1,025
Total investor real estate	9,447	10,727
Residential first mortgage	13,394	13,784
Home equity	12,321	13,021
Indirect	2,060	1,848
Consumer credit card	922	987
Other consumer	1,181	1,202
Total consumer	29,878	30,842
Loans, net of unearned income	$ 76,202	$ 77,594

Commercial and industrial loans

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Commercial construction real estate owner occupied loans

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Commercial Investor Real Estate Construction Loans

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Commercial Investor Real Estate Mortgage Loans

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Commercial real estate loans owner occupied loans.

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Represents lending initiated through third-party business partners, largely comprised of loans made through automotive dealerships

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Residential first mortgage

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Total Investor Real Estate Loans

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Amounts receivable from issuing a card to individuals or businesses that allows someone to make a purchase on borrowed money.

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Reflects the net carrying amount of commercial loans and leases held in portfolio, after deducting deferred income, but before deducting the allowance for losses on commercial loans and leases.

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Reflects the sum of the gross carrying amounts of the various categories of loans made to individuals for personal needs, including mortgage, home equity, vehicles, credit card, installment, and lease financing.

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Gross amount under revolving lines of credit outstanding extended to a homeowner and collateralized by the equity in the home. Such lines of credit are generally subordinated to the homeowner's mortgage loan or loans. Loan proceeds are generally unrestricted as to use by the borrower.

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The gross amount of other loans and leases to individuals not otherwise specified in the existing taxonomy.

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Reflects the aggregate gross carrying amount of all categories of loans and leases held in portfolio, after deducting deferred income, but before deducting the allowance for losses on loans and leases.

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