Commitments, Guarantees, and Contingent Liabilities (Schedule of Off Balance Sheet Financial Instruments) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Unfunded lending commitments	$ 27,211	$ 25,797
Commercial letters of credit	17	22
Total unfunded lending commitments	28,008	26,661
Financial
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Standby letters of credit	581	597
Performance
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Standby letters of credit	$ 199	$ 245