Loans and Leases (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans pledged to secure borrowings	$ 6,200		$ 6,500
Loans and leases, deferred fees and costs	57		54
Discounts on acquired loans	666		707
Principal Balance of Loan	47,697		47,776
Carrying balance of PCD loans	47,238		47,310
Interest income recognized on leases	6	$ 6
Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal Balance of Loan	467		473
Carrying balance of PCD loans	411		416
Asset Pledged as Collateral
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans pledged to secure borrowings	$ 30,300		30,600
Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Lease term	3 years
Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Lease term	5 years
Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Interest Receivable	$ 188		$ 186

Amount of interest income from net investment in direct financing lease.

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