Commitments, Contingent Liabilities and Guarantees - Additional Information (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2022	Sep. 30, 2019	Jun. 30, 2018	Sep. 30, 2014	Sep. 30, 2012	Mar. 31, 2012	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010	Dec. 31, 2008
Loss Contingencies
Margin account balance held by the brokerage clearing agent	$ 14	$ 20
Visa
Loss Contingencies
Fair value of mortgage representation and warranty provisions	195	214
Visa IPO, shares of Visa's Class B common stock received (in shares)												10.1
Visa Class B shares carryover basis												$ 0
Escrow deposit	350	250	$ 600	$ 300	$ 600	$ 450	$ 150	$ 1,565	$ 400	$ 800	$ 500	$ 3,000
Residential mortgage loans
Loss Contingencies
Outstanding balances on residential mortgage loans sold with representation and warranty provisions	9	9
Fair value of mortgage representation and warranty provisions	11
Make-Whole Payments	0	0
Repurchased outstanding principal	63	42
Repurchase demand request	104	64
Outstanding repurchase demand inventory	25	18
Secured Debt
Loss Contingencies
Fully and unconditionally guaranteed certain long-term borrowing obligations issued by wholly-owned issuing trust entities	62	62
Standby Letters of Credit
Loss Contingencies
Reserve for unfunded commitments	$ 22	$ 24
Standby letters of credit as a percentage of total letters of credit	99.00%	99.00%
Standby Letters of Credit | Secured Debt
Loss Contingencies
Standby letters of credit as a percentage of total letters of credit	67.00%	71.00%
Variable Rate Demand Note
Loss Contingencies
Total variable rate demand notes	$ 423	$ 464
Letters of credit issued related to variable rate demand notes	102	118
Variable Rate Demand Note | Trading Securities
Loss Contingencies
Total variable rate demand notes	3	1
Other Liabilities
Loss Contingencies
Reserve for unfunded commitments	$ 216	$ 182