Commitments, Guarantees, Contingent Liabilities, and Related Parties (Narrative) (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) case	Dec. 31, 2021 USD ($)
Guarantor Obligations [Line Items]
Commitments to extend credit expiring in one year | $	$ 7,700,000,000
Standby letters of credit expiring in one year | $	851,000,000
Principal amount, Farmer Mac agreement | $	$ 23,000,000	$ 1,000,000
Number of civil cases | case	2
Loss contingency, new claims filed, number | case	5
Loss contingency, claims dismissed, number | case	4
Loss contingency, pending claims, number | case	5
Loss contingency, claims settled, number | case	2
Minimum
Guarantor Obligations [Line Items]
Limitied recourse provision, period	3 months
Estimate of possible losses | $	$ 0
Maximum
Guarantor Obligations [Line Items]
Limitied recourse provision, period	1 year
Estimate of possible losses | $	$ 5,000,000