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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 | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Interest and Fee Income, Loans and Leases Held-in-portfolio |  | $ 849 | $ 898 | $ 1,703 | $ 1,801
Long-term borrowings |  | 26 | 49 | 53 | 108
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Loans Including Fees in Interest Income [Member] |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amounts Related to Interest Settlements on Derivatives |  | 0 | 0 | 0 | 0
Gain or (Loss) Recognized in Income on Derivatives |  | 0 | 0 | 0 | 0
Gain or (Loss) Recognized in Income on Related Hedged Item |  | 0 | 0 | 0 | 0
Gain (Loss) on Fair Value Hedges Recognized in Earnings |  | 0 | 0 | 0 | 0
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Long-term Borrowings In Interest Expense [Member] |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amounts Related to Interest Settlements on Derivatives |  | 7 | 11 | 14 | 15
Gain or (Loss) Recognized in Income on Derivatives |  | (4) | 1 | (26) | 77
Gain or (Loss) Recognized in Income on Related Hedged Item |  | 4 | (1) | 26 | (77)
Gain (Loss) on Fair Value Hedges Recognized in Earnings |  | 7 | 11 | 14 | 15
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Loans Including Fees in Interest Income [Member] |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Gain or (Loss) Reclassified from AOCI into Income | [1],[2] | 104 | 60 | 206 | 69
Net Income (Expense) Recognized on Cash Flow Hedges | [2] | 104 | 60 | 206 | 69
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Long-term Borrowings In Interest Expense [Member] |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Gain or (Loss) Reclassified from AOCI into Income | [1],[2] | 0 | 0 | 0 | 0
Net Income (Expense) Recognized on Cash Flow Hedges | [2] | $ 0 | $ 0 | $ 0 | $ 0
[1] | Pre-tax
[2] | See Note 5 for gain or (loss) recognized for cash flow hedges in AOCI.

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + Details
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- Definition Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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