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Variable Interest Entities and Securitizations - Carrying Amount of Consolidated and Unconsolidated VIEs (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | $ 5,343 | $ 5,413
Carrying Amount of Assets | 421,602 | 390,365
Carrying Amount of Liabilities | 361,398 | 332,354
Consolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 26,619 | 35,519
Carrying Amount of Liabilities | 12,436 | 18,201
Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 5,093 | 5,127
Carrying Amount of Liabilities | 1,240 | 1,289
Affordable housing entities |  |
Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | 4,602 | 4,559
VIE, nonconsolidated, carrying amount of assets included in certain investment structures | 2,300 | 2,300
VIE, nonconsolidated, carrying amount of liabilities included in certain investment structures | 596 | 741
Affordable housing entities | Consolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 242 | 236
Carrying Amount of Liabilities | 17 | 7
Affordable housing entities | Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 4,602 | 4,559
Carrying Amount of Liabilities | 1,240 | 1,289
Entities that provide capital to low-income and rural communities |  |
Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | 0 | 0
Entities that provide capital to low-income and rural communities | Consolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 1,951 | 1,889
Carrying Amount of Liabilities | 26 | 69
Entities that provide capital to low-income and rural communities | Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 0 | 0
Carrying Amount of Liabilities | 0 | 0
Other |  |
Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | 436 | 502
Other | Consolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 0 | 0
Carrying Amount of Liabilities | 0 | 0
Other | Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 436 | 502
Carrying Amount of Liabilities | 0 | 0
Total other VIEs |  |
Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | 5,038 | 5,061
Total other VIEs | Consolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 2,193 | 2,125
Carrying Amount of Liabilities | 43 | 76
Total other VIEs | Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 5,038 | 5,061
Carrying Amount of Liabilities | 1,240 | 1,289
Credit card loan securitizations |  |
Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | 0 | 0
Credit card loan securitizations | Consolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 22,066 | 31,112
Carrying Amount of Liabilities | 10,338 | 16,113
Credit card loan securitizations | Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 0 | 0
Carrying Amount of Liabilities | 0 | 0
Auto loan securitizations |  |
Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | 0 | 0
Auto loan securitizations | Consolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 2,360 | 2,282
Carrying Amount of Liabilities | 2,055 | 2,012
Auto loan securitizations | Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 0 | 0
Carrying Amount of Liabilities | 0 | 0
Home loan |  |
Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | 305 | 352
Home loan | Consolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 0 | 0
Carrying Amount of Liabilities | 0 | 0
Home loan | Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 55 | 66
Carrying Amount of Liabilities | 0 | 0
Total securitization-related VIEs |  |
Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | 305 | 352
Total securitization-related VIEs | Consolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 24,426 | 33,394
Carrying Amount of Liabilities | 12,393 | 18,125
Total securitization-related VIEs | Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 55 | 66
Carrying Amount of Liabilities | $ 0 | $ 0

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- Definition In certain investment structures, we consolidate a VIE which in turn holds as its primary asset an investment in an unconsolidated VIE. This concept represents the carrying amount of assets related to these investment structures. + References No definition available. + Details
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- Definition In certain investment structures, we consolidate a VIE which in turn holds as its primary asset an investment in an unconsolidated VIE. This concept represents the carrying amount of liabilities related to these investment structures. + References No definition available. + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19-26) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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