Securitizations and Variable Interest Entities, Transfers with Continuing Involvement (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Excluding resecuritization [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Cash flows from other interests held	$ 95	$ 116	$ 399	$ 577
Excluding resecuritization [Member] | Fair value, inputs, level 2 [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Securities recognized, trading	3,000	13,600	13,300	31,600
Excluding resecuritization [Member] | Residential mortgages [Member]
Quantitative Information, Transferor's Continuing Involvement [Line Items]
Assets sold	14,447	37,230	64,438	123,719
Proceeds from transfer	14,447	37,412	64,490	124,333
Net gains (losses) on sale	0	182	52	614
Excluding resecuritization [Member] | Residential mortgages [Member] | Fair value, inputs, level 3 [Member]
Quantitative Information, Transferor's Continuing Involvement [Line Items]
Servicing rights recognized	193	378	833	1,272
Excluding resecuritization [Member] | Residential mortgages [Member] | Fair value, inputs, level 2 [Member]
Quantitative Information, Transferor's Continuing Involvement [Line Items]
Securities recognized	0	1,363	2,062	17,757
Excluding resecuritization [Member] | Residential mortgages [Member] | Collateralized financing receivable [Member]
Quantitative Information, Transferor's Continuing Involvement [Line Items]
Loans recognized	0	0	0	926
Excluding resecuritization [Member] | Commercial mortgages [Member]
Quantitative Information, Transferor's Continuing Involvement [Line Items]
Assets sold	3,061	3,502	11,439	11,866
Proceeds from transfer	3,121	3,583	11,629	12,092
Net gains (losses) on sale	60	81	190	226
Excluding resecuritization [Member] | Commercial mortgages [Member] | Fair value, inputs, level 3 [Member]
Quantitative Information, Transferor's Continuing Involvement [Line Items]
Servicing rights recognized	32	52	102	123
Excluding resecuritization [Member] | Commercial mortgages [Member] | Fair value, inputs, level 2 [Member]
Quantitative Information, Transferor's Continuing Involvement [Line Items]
Securities recognized	39	30	176	98
Excluding resecuritization [Member] | Commercial mortgages [Member] | Collateralized financing receivable [Member]
Quantitative Information, Transferor's Continuing Involvement [Line Items]
Loans recognized	0	0	0	0
Government insured or guaranteed [Member] | Excluding resecuritization [Member] | Residential mortgages [Member]
Quantitative Information, Transferor's Continuing Involvement [Line Items]
Net gains (losses) on sale	0	0	0	0
VIEs that we do not consolidate [Member] | Excluding resecuritization [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Maximum exposure to loss	27,833		27,833		$ 28,370
VIEs that we do not consolidate [Member] | Excluding resecuritization [Member] | Debt, guarantees, and other commitments [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Maximum exposure to loss	4,698		4,698		4,696
VIEs that we do not consolidate [Member] | Conforming mortgage loan securitization [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Repurchases of assets/loss reimbursements	574	$ 780	2,100	$ 3,700
Carrying value of delinquent loans eligible for repurchase	345		345		107
Principal amount that would be payable to securitization vehicles	345		345		107
VIEs that we do not consolidate [Member] | Conforming mortgage loan securitization [Member] | Debt and other liabilities [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Liability for mortgage repurchase reserves amount, fair value	158		158		173
VIEs that we do not consolidate [Member] | Conforming mortgage loan securitization [Member] | Debt, guarantees, and other commitments [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Maximum exposure to loss	$ 13,600		$ 13,600		$ 13,300