Off-balance Sheet Lending-related Financial Instruments, Guarantees, and Other Commitments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	$ 1,523,109	$ 1,497,847
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	1,102,163
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	201,485
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	182,501
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	36,960
Off-balance sheet lending-related financial commitments, Carrying value	3,866	4,139
Total Consumer
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	990,595	961,061
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	964,512
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	7,521
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	6,048
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	12,514
Off-balance sheet lending-related financial commitments, Carrying value	778	826
Total consumer, excluding credit card
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	46,660	45,403
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	20,577
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	7,521
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	6,048
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	12,514
Off-balance sheet lending-related financial commitments, Carrying value	778	826
Residential real estate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	31,911	30,125
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	9,161
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	7,387
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	6,048
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	9,315
Off-balance sheet lending-related financial commitments, Carrying value	674	678
Residential real estate | First Republic
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet lending-related financial commitments, Carrying value	596	630
Auto and other
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	14,749	15,278
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	11,416
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	134
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	0
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	3,199
Off-balance sheet lending-related financial commitments, Carrying value	104	148
Auto and other | First Republic
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet lending-related financial commitments, Carrying value	104	148
Credit card
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	943,935	915,658
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	943,935
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	0
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	0
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	0
Off-balance sheet lending-related financial commitments, Carrying value	0	0
Total wholesale
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	532,514	536,786
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	137,651
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	193,964
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	176,453
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	24,446
Off-balance sheet lending-related financial commitments, Carrying value	3,088	3,313
Other unfunded commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	500,129	503,526
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	119,474
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	184,303
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	172,614
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	23,738
Off-balance sheet lending-related financial commitments, Carrying value	2,638	2,797
Off balance sheet lending related financial instruments guarantees and other commitments - supplemental information
Risk participations for other unfunded commitments to extend credit	82	88
Other unfunded commitments to extend credit | First Republic
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet lending-related financial commitments, Carrying value	935	1,100
Standby letters of credit and other financial guarantees
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	28,317	28,872
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	14,536
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	9,382
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	3,792
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	607
Off-balance sheet lending-related financial commitments, Carrying value	413	479
Other guarantees and commitments, Carrying value	326	369
Off balance sheet lending related financial instruments guarantees and other commitments - supplemental information
Risk participations for standby letters of credit and other financial guarantees	8,100	8,200
Other letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	4,068	4,388
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	3,641
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	279
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	47
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	101
Off-balance sheet lending-related financial commitments, Carrying value	37	37
Other guarantees and commitments, Carrying value	0	0
Off balance sheet lending related financial instruments guarantees and other commitments - supplemental information
Risk participations for other letters of credit	490	589
Securities lending indemnification agreements and guarantees
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	317,054	283,664
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	317,054
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	0
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	0
Other guarantees and commitments, Contractual amount, Expiring after 5 years	0
Other guarantees and commitments, Carrying value	0	0
Off balance sheet lending related financial instruments guarantees and other commitments - supplemental information
Indemnification agreement securities lending guarantees collateral held in support of	335,400	300,300
Derivatives qualifying as guarantees
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	55,908	54,562
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	3,804
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	47
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	11,179
Other guarantees and commitments, Contractual amount, Expiring after 5 years	40,878
Other guarantees and commitments, Carrying value	98	89
Unsettled resale and securities borrowed agreements
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	141,498	95,106
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	141,196
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	302
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	0
Other guarantees and commitments, Contractual amount, Expiring after 5 years	0
Other guarantees and commitments, Carrying value	1	0
Unsettled repurchase and securities loaned agreements
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	99,846	60,724
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	99,305
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	541
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	0
Other guarantees and commitments, Contractual amount, Expiring after 5 years	0
Other guarantees and commitments, Carrying value	0	0
Mortgage repurchase liability
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan sale and securitization-related indemnifications, Mortgage repurchase liability, Carrying value	60	76
Loans sold with recourse
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan sale and securitization-related indemnifications, Loans sold with recourse, Contractual amount	834	803
Loan sale and securitization-related indemnifications, Loans sold with recourse, Carrying value	23	24
Exchange & clearing house guarantees and commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	128,408	265,887
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	128,408
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	0
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	0
Other guarantees and commitments, Contractual amount, Expiring after 5 years	0
Other guarantees and commitments, Carrying value	0	0
Other guarantees and commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	11,808	15,074
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	9,806
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	869
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	49
Other guarantees and commitments, Contractual amount, Expiring after 5 years	1,084
Other guarantees and commitments, Carrying value	$ 31	$ 38
Days Past Due, 60 or More | Credit card
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Line of credit close criteria, period past due	60 days