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Short-term Borrowings Short-term Borrowings (Narrative) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Short-Term Debt [Abstract] |  |
Short-term borrowings | $ 0 | $ 3,600
Pledged loans to provide collateralized borrowing with the FRB | 20,300 |
Available collateralized borrowing with the FRB | $ 16,800 |

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- Definition Short Term Advances + References No definition available. + Details
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Balance Type: | debit
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Fair value of liabilities arising from or related to a financial instrument held by the entity for its own account (proprietary securities) which has been pledged to counterparties. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- References No definition available. + Details
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