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Derivative Financial Instruments And Hedging Activities (Schedule Of The Effect Of Derivative Instruments On The Statements Of Operations) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Debt securities | $ 925 | $ 749 | $ 688
Loans, including fees | 5,732 | 5,733 | 4,088
Fair Value Hedging | Interest Rate Contract | Taxable Debt Securities in Interest Income [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amounts Related to Interest Settlements on Derivatives | 8 | (1) | 41
Gain or (Loss) Recognized in Income on Derivatives | 27 | (6) | 0
Gain or (Loss) Recognized in Income on Related Hedged Item | (27) | 6 | 0
Gain (Loss) on Fair Value Hedges Recognized in Earnings | 8 | (1) | 41
Fair Value Hedging | Interest Rate Contract | Loans Including Fees in Interest Income [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amounts Related to Interest Settlements on Derivatives | 0 | 0 | 0
Gain or (Loss) Recognized in Income on Derivatives | 0 | 0 | 0
Gain or (Loss) Recognized in Income on Related Hedged Item | 0 | 0 | 0
Gain (Loss) on Fair Value Hedges Recognized in Earnings | 0 | 0 | 0
Fair Value Hedging | Interest Rate Contract | Long-term Borrowings In Interest Expense [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amounts Related to Interest Settlements on Derivatives | (67) | (64) | (16)
Gain or (Loss) Recognized in Income on Derivatives | 22 | 46 | (124)
Gain or (Loss) Recognized in Income on Related Hedged Item | (22) | (46) | 124
Gain (Loss) on Fair Value Hedges Recognized in Earnings | (67) | (64) | (16)
Fair Value Hedging | Interest Rate Contract | Deposits |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amounts Related to Interest Settlements on Derivatives | 1 |  |
Gain or (Loss) Recognized in Income on Derivatives | 0 |  |
Gain or (Loss) Recognized in Income on Related Hedged Item | 0 |  |
Gain (Loss) on Fair Value Hedges Recognized in Earnings | (1) |  |
Cash Flow Hedging | Interest Rate Contract | Taxable Debt Securities in Interest Income [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain or (Loss) Reclassified from AOCI into Income | 0 | 0 | 0
Net Income (Expense) Recognized on Cash Flow Hedges | 0 | 0 | 0
Cash Flow Hedging | Interest Rate Contract | Loans Including Fees in Interest Income [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain or (Loss) Reclassified from AOCI into Income | (420) | (236) | 140
Net Income (Expense) Recognized on Cash Flow Hedges | (420) | (236) | 140
Cash Flow Hedging | Interest Rate Contract | Long-term Borrowings In Interest Expense [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain or (Loss) Reclassified from AOCI into Income | 0 | 0 | 0
Net Income (Expense) Recognized on Cash Flow Hedges | 0 | $ 0 | $ 0
Cash Flow Hedging | Interest Rate Contract | Deposits |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain or (Loss) Reclassified from AOCI into Income | 0 |  |
Net Income (Expense) Recognized on Cash Flow Hedges | $ 0 |  |

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- Definition Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 815 -SubTopic 25 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480238/815-25-50-1 + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A + Details
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- Definition The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
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