Off-balance Sheet Lending-related Financial Instruments, Guarantees, and Other Commitments (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	$ 1,576,476	$ 1,497,847
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	1,138,174
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	220,016
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	181,409
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	36,877
Off-balance sheet lending-related financial commitments, Carrying value	3,835	4,139
Total Consumer
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	1,034,916	961,061
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	1,010,698
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	7,365
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	5,046
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	11,807
Off-balance sheet lending-related financial commitments, Carrying value	618	826
Total consumer, excluding credit card
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	45,322	45,403
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	21,104
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	7,365
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	5,046
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	11,807
Off-balance sheet lending-related financial commitments, Carrying value	618	826
Residential real estate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	31,440	30,125
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	10,843
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	7,347
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	5,046
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	8,204
Off-balance sheet lending-related financial commitments, Carrying value	563	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	505	630
Auto and other
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	13,882	15,278
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	10,261
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	18
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	3,603
Off-balance sheet lending-related financial commitments, Carrying value	55	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	55	148
Credit card
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	989,594	915,658
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	989,594
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	541,560	536,786
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	127,476
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	212,651
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	176,363
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	25,070
Off-balance sheet lending-related financial commitments, Carrying value	3,217	3,313
Other unfunded commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	508,297	503,526
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	107,885
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	202,960
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	172,960
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	24,492
Off-balance sheet lending-related financial commitments, Carrying value	2,695	2,797
Off balance sheet lending related financial instruments guarantees and other commitments - supplemental information
Risk participations for other unfunded commitments to extend credit	94	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	769	1,100
Standby letters of credit and other financial guarantees
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	29,225	28,872
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	15,995
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	9,386
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	3,367
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	477
Off-balance sheet lending-related financial commitments, Carrying value	484	479
Other guarantees and commitments, Carrying value	382	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	9,600	8,200
Other letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Total lending-related commitments	4,038	4,388
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring in 1 year or less	3,596
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 1 year through 3 years	305
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 3 years through 5 years	36
Off-balance sheet lending-related financial commitments, Contractual amount, Expiring after 5 years	101
Off-balance sheet lending-related financial commitments, Carrying value	38	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	548	589
Securities lending indemnification agreements and guarantees
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	334,224	283,664
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	334,224
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
Collateral held in support of securities lending indemnification agreements	355,700	300,300
Derivatives qualifying as guarantees
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	53,149	54,562
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	1,554
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	327
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	10,311
Other guarantees and commitments, Contractual amount, Expiring after 5 years	40,957
Other guarantees and commitments, Carrying value	67	89
Unsettled resale and securities borrowed agreements
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	153,962	95,106
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	153,695
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	267
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	2	0
Unsettled repurchase and securities loaned agreements
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	95,262	60,724
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	94,694
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	568
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	(3)	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	45	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	961	803
Loan sale and securitization-related indemnifications, Loans sold with recourse, Carrying value	21	24
Exchange & clearing house guarantees and commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Other guarantees and commitments, Contractual amount	268,646	265,887
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	268,646
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	12,679	15,074
Other guarantees and commitments, Contractual amount, Expiring in 1 year or less	10,837
Other guarantees and commitments, Contractual amount, Expiring after 1 year through 3 years	742
Other guarantees and commitments, Contractual amount, Expiring after 3 years through 5 years	267
Other guarantees and commitments, Contractual amount, Expiring after 5 years	833
Other guarantees and commitments, Carrying value	$ 29	$ 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