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Borrowings (Narrative) (Details) - USD ($) $ in Billions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Federal Home Loan Bank, Advance, Branch of FHLBank [Line Items] |  |
Advance from Federal Home Loan Bank | $ 2.3 | $ 3.1
Minimum |  |
Federal Home Loan Bank, Advance, Branch of FHLBank [Line Items] |  |
FHLB Advances Fixed Interest Rates | 4.12% |
Maximum |  |
Federal Home Loan Bank, Advance, Branch of FHLBank [Line Items] |  |
FHLB Advances Fixed Interest Rates | 4.52% |

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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478878/942-470-45-1 + Details
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- Definition Rate of interest applicable on advance from Federal Home Loan Bank (FHLBank). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478878/942-470-45-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-3 + Details
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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 No definition available. + Details
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