Commitments, Guarantees, Contingent Liabilities, and Related Parties (Schedule of Off-Balance Sheet Financial Instruments) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Guarantor Obligations [Line Items]
Net unfunded commitments to extend credit	$ 28,940	$ 29,628
Commercial letters of credit	22	11
Mortgage-backed security purchase agreement	66	23
Total unfunded commitments	29,782	30,513
Financial
Guarantor Obligations [Line Items]
Standby letters of credit	548	667
Performance
Guarantor Obligations [Line Items]
Standby letters of credit	$ 206	$ 184