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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%

X

- 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

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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

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-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

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+ References

No definition available.

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