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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023
Accounting Policies [Abstract] |  |
Gross equity method investments | $ 198,000,000 | $ 192,000,000
Equity Securities without Readily Determinable Fair Value, Amount | 65,000,000 | 70,000,000
Other Investments | 263,000,000 | $ 262,000,000
Financing Receivable, Modifications [Line Items] |  |
Commercial And Investor Real Estate Loans Subject To Charge Offs Maximum | $ 250,000 |
Days For Commercial and Investor Real Estate Loans To Be Evaluated As Potential Charge Off | 180 days |
Days for certain equipment finance loans to be evaluated as potential charge off | 120 days |
Days For Consumer First Lien Postion Loans To Be Evaluated As Potential Charge Off | 180 days |
Days For Home Equity Loans In Second Lien Position To Be Evaluated As Potential Charge Off | 120 days |
Days For Consumer Close-Ended Loans To Be Evaluated As Potential Charge Off | 120 days |
Days for Consumer Loans in an Open-Ended Position to be Evaluated for Potential Charge Off | 180 days |
Days for Credit Cards to be Evaluated for Potential Charge Off | 180 days |
Minimum [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Lessee, Operating Lease, Term of Contract | 1 year |
Maximum [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Lessee, Operating Lease, Term of Contract | 20 years |
Leasehold improvements | Minimum [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Property, Plant and Equipment, Useful Life | 7 years |
Leasehold improvements | Maximum [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Property, Plant and Equipment, Useful Life | 40 years |
Furniture and equipment | Minimum [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Property, Plant and Equipment, Useful Life | 3 years |
Furniture and equipment | Maximum [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Property, Plant and Equipment, Useful Life | 10 years |
Software | Minimum [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Property, Plant and Equipment, Useful Life | 5 years |
Software | Maximum [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Property, Plant and Equipment, Useful Life | 20 years |

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