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Capital Ratios (Narrative) (Details) - USD ($) $ in Billions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2021
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Capital Ratios, Basel III, Capital Conservation Buffer, Year Three | 2.50% |
Community Bank Leverage Ratio, Minimum |  | 9.00%
Consolidated asset limit on small bank holding companies | $ 3 |
Bank [Member] |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Capital ratios, capital conservation buffer | 4.88% |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1 + Details
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