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Loans And The Allowance For Credit Losses (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable no allowance	$ 107		$ 107		$ 119
Loans, net of unearned income	96,723		96,723		96,727
Defaulted during period as modification to troubled borrower, twelve months prior to modification	23	$ 56	48	$ 135
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	54,751		54,751		54,845
Commercial | Extended Maturity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified, Accumulated	80		80		71
Investor Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	9,098		9,098		8,710
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	32,874		32,874		33,172
Collateral Dependent Member | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	264		264		264
Collateral Dependent Member | Investor Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	215		215		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	$ 123		$ 123		$ 115

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