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Derivative Financial Instruments And Hedging Activities (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2021 | Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months |  | $ 427 |
Pre-tax net income related to amortization of discontinued cash flow hedges |  | 174 |
Notional Amount | $ 126,602 | 126,602 | $ 128,614
Maximum potential future exposure on swap participations | 537 | 537 |
Aggregate fair value of all derivative instruments with credit risk | 115 | 115 | 74
Posted collateral related to derivative instruments with credit risk | 116 | 116 | 74
Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional Amount | 104,352 | 104,352 | 104,764
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional Amount | 806 | 806 | 924
Forward Sale Commitments [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional Amount | 1,500 | 1,500 | 1,900
Forward Rate Commitments and Futures Contracts [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional Amount | 3,900 | 3,900 | $ 4,100
Interest Rate Floor [Member] |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional Value of terminated derivatives | 250 | 2,300 |
Swap |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |
Notional Value of terminated derivatives | $ 3,000 | $ 5,600 |

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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + Details
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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624258-113959 + Details
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- Definition Maximum potential amount of future undiscounted payments that could be required under the credit derivative, before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4K -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5708775-113959 + 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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- Definition The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624258-113959 + Details
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
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- Definition The amount of net gain (loss) reclassified into earnings in the period when cash flow hedge is discontinued because it is probable that the original forecasted transactions will not occur by the end of the original period or an additional two month time period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + Details
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