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Loans And The Allowance For Credit Losses (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable no allowance	$ 150		$ 119
Loans, net of unearned income	95,733		96,727
Defaulted during period as modification to troubled borrower, twelve months prior to modification	24	$ 79
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	54,044		54,845
Commercial | Extended Maturity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated			71
Investor Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	8,833		8,710
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	32,856		33,172
Collateral Dependent Member | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	291		264
Collateral Dependent Member | Investor Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	293		323
Collateral Dependent Member | Consumer | residential real estate and home equity loan and lines
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 119		$ 115

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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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Amortized cost of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease.

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