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Loan Sale and Servicing Activities and Variable Interest Entities (Cash Flows Associated with Loan Sale and Servicing Activities) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Residential mortgage loans held for sale |  |  |  |  |
Cash flows from sales of loans | $ 2,475 | $ 1,799 | $ 5,997 | $ 5,328 |
Cash flows from repurchases of previously transferred loans | 45 | 352 | 189 | 547 |
Cash flows from servicing fees | 105 | 85 | 270 | 251 |
Cash flows from servicing advances recovered/(funded), net | (4) | (15) | 8 | 4 |
Cash flows on mortgage-backed securities held | 2,041 | 2,829 | 7,256 | 6,374 |
Carrying value of mortgage-backed securities held | 15,900 | 19,500 | 15,900 | 19,500 | $ 16,500
Commercial mortgage loans held for sale |  |  |  |  |
Cash flows from sales of loans | 881 | 839 | 2,604 | 2,666 |
Cash flows from repurchases of previously transferred loans | 103 | 107 | 145 | 132 |
Cash flows from servicing fees | 43 | 33 | 119 | 97 |
Cash flows from servicing advances recovered/(funded), net | 28 | (78) | (8) | (206) |
Cash flows on mortgage-backed securities held | 18 | 14 | 66 | 65 |
Carrying value of mortgage-backed securities held | $ 600 | $ 800 | $ 600 | $ 800 | $ 800

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- Definition Securities held where we transferred and/or serviced loans to a securitization special purpose entity (SPE) and we hold securities issued by that SPE. + References No definition available. + Details
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- Definition Represents the cash flows of securities held where we transferred and/or serviced loans to a securitization special purpose entity (SPE) and we hold securities issued by that SPE. + References No definition available. + Details
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- Definition Cash Flows between a transferor and a transferee attributable to newly transferred assets related to either a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719 + Details
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- Definition Cash Flows between a transferor and a transferee attributable to purchases of previously transferred financial assets (or its underlying collateral) related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719 + Details
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- Definition Cash Flows between a transferee and a transferor attributable to servicing fees related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(4) -URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719 + Details
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