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Variable Interest Entities and Securitizations - Carrying Amount of Consolidated and Unconsolidated VIEs (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | $ 5,174 | $ 5,038
Carrying Amount of Assets | 423,420 | 421,602
Carrying Amount of Liabilities | 358,796 | 361,398
Consolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 24,746 | 26,619
Carrying Amount of Liabilities | 10,681 | 12,436
Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 5,174 | 5,038
Carrying Amount of Liabilities | 1,427 | 1,240
Affordable housing entities |  |
Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | 4,763 | 4,602
VIE, nonconsolidated, carrying amount of assets included in certain investment structures | 2,200 | 2,300
VIE, nonconsolidated, carrying amount of liabilities included in certain investment structures | 606 | 596
Affordable housing entities | Consolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 272 | 242
Carrying Amount of Liabilities | 31 | 17
Affordable housing entities | Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 4,763 | 4,602
Carrying Amount of Liabilities | 1,427 | 1,240
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 | 2,035 | 1,951
Carrying Amount of Liabilities | 26 | 26
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 | 411 | 436
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 | 411 | 436
Carrying Amount of Liabilities | 0 | 0
Total other VIEs |  |
Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | 5,174 | 5,038
Total other VIEs | Consolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 2,307 | 2,193
Carrying Amount of Liabilities | 57 | 43
Total other VIEs | Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 5,174 | 5,038
Carrying Amount of Liabilities | 1,427 | 1,240
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 | 20,671 | 22,066
Carrying Amount of Liabilities | 9,115 | 10,338
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 | 1,768 | 2,360
Carrying Amount of Liabilities | 1,509 | 2,055
Auto loan securitizations | Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 0 | 0
Carrying Amount of Liabilities | 0 | 0
Total securitization-related VIEs |  |
Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | 0 | 0
Total securitization-related VIEs | Consolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 22,439 | 24,426
Carrying Amount of Liabilities | 10,624 | 12,393
Total securitization-related VIEs | Unconsolidated |  |
Variable Interest Entity [Line Items] |  |
Carrying Amount of Assets | 0 | 0
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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