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Fair Value Measurements (Summary Of Quantitative Information About Level 3 Fair Value Measurements) (Details) $ in Millions | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($)
--- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Residential mortgage servicing rights | $ 770 | $ 418
Loans held for sale, at fair value | 369 | 783
Level 3 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans held for sale, at fair value | 60 | 104
Recurring Fair Value Measurements [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Residential mortgage servicing rights | 770 | 418
Loans held for sale, at fair value | 369 | 783
Recurring Fair Value Measurements [Member] | Level 3 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Residential mortgage servicing rights | 770 | 418
Loans held for sale, at fair value | 57 | 90
Recurring Fair Value Measurements [Member] | Mortgage Servicing Rights [Member] | Level 3 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Residential mortgage servicing rights | $ 770 | $ 418
Recurring Fair Value Measurements [Member] | Mortgage Servicing Rights [Member] | Minimum [Member] | Discounted Cash Flow [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Weighted Average CPR | 0.062 | 0.072
Option-Adjusted Spread | 4.40% | 3.70%
Recurring Fair Value Measurements [Member] | Mortgage Servicing Rights [Member] | Maximum [Member] | Discounted Cash Flow [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Weighted Average CPR | 0.181 | 0.222
Option-Adjusted Spread | 8.20% | 7.70%
Recurring Fair Value Measurements [Member] | Mortgage Servicing Rights [Member] | Weighted Average [Member] | Discounted Cash Flow [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Weighted Average CPR | 0.079 | 0.105
Option-Adjusted Spread | 4.80% | 4.50%
Recurring Fair Value Measurements [Member] | Commercial Mortgage Loans Held For Sale | Level 3 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans held for sale, at fair value |  | $ 90
Recurring Fair Value Measurements [Member] | Commercial Mortgage Loans Held For Sale | Minimum [Member] | Valuation Technique, Discounted Cash Flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans Held-for-sale, Measurement Input |  | 0.002
Recurring Fair Value Measurements [Member] | Commercial Mortgage Loans Held For Sale | Maximum [Member] | Valuation Technique, Discounted Cash Flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans Held-for-sale, Measurement Input |  | 0.194
Recurring Fair Value Measurements [Member] | Commercial Mortgage Loans Held For Sale | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans Held-for-sale, Measurement Input |  | 0.013

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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 + Details
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