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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

X

- 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

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+ References

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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.

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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.

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The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

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