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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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Securitizations and Variable Interest Entities, Unconsolidated VIEs (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Variable Interest Entity [Line Items]
Total loans	$ 945,906	$ 895,394	$ 862,827
Equity securities	59,560	72,886
Securitizations and Variable Interest Entities Textual [Abstract]
Trading debt securities	85,766	88,265
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member]
Variable Interest Entity [Line Items]
Assets, nonconsolidated VIE	206,731	199,695
Maximum exposure to loss	27,833	28,370
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Nonconforming mortgage loan securitizations [Member]
Variable Interest Entity [Line Items]
Assets, nonconsolidated VIE	153,831	146,482
Maximum exposure to loss	3,092	3,341
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Tax credit structures [Member]
Variable Interest Entity [Line Items]
Assets, nonconsolidated VIE	45,130	44,528
Maximum exposure to loss	17,795	17,956
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Commercial real estate loans [Member]
Variable Interest Entity [Line Items]
Assets, nonconsolidated VIE	5,632	5,489
Maximum exposure to loss	6,338	6,199
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Other [Member]
Variable Interest Entity [Line Items]
Assets, nonconsolidated VIE	2,138	3,196
Maximum exposure to loss	608	874
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Loans [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	7,802	7,916
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Loans [Member] \| Nonconforming mortgage loan securitizations [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	0	0
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Loans [Member] \| Tax credit structures [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	1,864	1,904
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Loans [Member] \| Commercial real estate loans [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	5,619	5,481
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Loans [Member] \| Other [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	319	531
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Securities [Member] \| Debt securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	2,469	2,623
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Securities [Member] \| Equity securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	12,221	12,384
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Securities [Member] \| Nonconforming mortgage loan securitizations [Member] \| Debt securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	2,468	2,620
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Securities [Member] \| Nonconforming mortgage loan securitizations [Member] \| Equity securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	0	0
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Securities [Member] \| Tax credit structures [Member] \| Debt securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	0	0
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Securities [Member] \| Tax credit structures [Member] \| Equity securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	12,182	12,322
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Securities [Member] \| Commercial real estate loans [Member] \| Debt securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	0	0
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Securities [Member] \| Commercial real estate loans [Member] \| Equity securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	0	0
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Securities [Member] \| Other [Member] \| Debt securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	1	3
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Securities [Member] \| Other [Member] \| Equity securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	39	62
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| All other assets [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	643	751
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| All other assets [Member] \| Nonconforming mortgage loan securitizations [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	610	694
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| All other assets [Member] \| Tax credit structures [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	0	0
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| All other assets [Member] \| Commercial real estate loans [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	13	8
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| All other assets [Member] \| Other [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	20	49
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Debt, guarantees, and other commitments [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	4,698	4,696
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Debt, guarantees, and other commitments [Member] \| Nonconforming mortgage loan securitizations [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	14	27
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Debt, guarantees, and other commitments [Member] \| Tax credit structures [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	3,749	3,730
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Debt, guarantees, and other commitments [Member] \| Commercial real estate loans [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	706	710
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Debt, guarantees, and other commitments [Member] \| Other [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	229	229
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Carrying value [Member]
Variable Interest Entity [Line Items]
Total loans	7,802	7,916
Debt securities	2,469	2,623
Equity securities	12,221	12,384
All other assets	643	751
Debt and other liabilities	(4,823)	(4,942)
Net assets	18,312	18,732
Securitizations and Variable Interest Entities Textual [Abstract]
Trading debt securities	216	352
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Carrying value [Member] \| Nonconforming mortgage loan securitizations [Member]
Variable Interest Entity [Line Items]
Total loans	0	0
Debt securities	2,468	2,620
Equity securities	0	0
All other assets	610	694
Debt and other liabilities	(14)	0
Net assets	3,064	3,314
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Carrying value [Member] \| Tax credit structures [Member]
Variable Interest Entity [Line Items]
Total loans	1,864	1,904
Debt securities	0	0
Equity securities	12,182	12,322
All other assets	0	0
Debt and other liabilities	(4,809)	(4,941)
Net assets	9,237	9,285
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Carrying value [Member] \| Commercial real estate loans [Member]
Variable Interest Entity [Line Items]
Total loans	5,619	5,481
Debt securities	0	0
Equity securities	0	0
All other assets	13	8
Debt and other liabilities	0	0
Net assets	5,632	5,489
VIEs that we do not consolidate [Member] \| Excluding resecuritization [Member] \| Carrying value [Member] \| Other [Member]
Variable Interest Entity [Line Items]
Total loans	319	531
Debt securities	1	3
Equity securities	39	62
All other assets	20	49
Debt and other liabilities	0	(1)
Net assets	$ 379	$ 644