Commitments, Guarantees, Contingent Liabilities, and Related Parties (Narrative) (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) case
Guarantor Obligations [Line Items]
Commitments to extend credit expiring in one year	$ 8,000,000,000
Standby letters of credit expiring in one year	$ 754,000,000
Number of civil cases | case	2
Minimum
Guarantor Obligations [Line Items]
Limited recourse provision, period	3 months
Estimate of possible losses	$ 0
Maximum
Guarantor Obligations [Line Items]
Limited recourse provision, period	1 year
Estimate of possible losses	$ 10,000,000