v3.26.3
Allowance for Credit Losses (Economic forecast Model Variables) (Details) - Expected
 9 Months Ended
Sep. 30, 2030
Sep. 30, 2029
Sep. 30, 2028
Sep. 30, 2027
Moody's Analytics' August 2026 consensus        
Financing Receivable, Allowance for Credit Loss [Line Items]        
U.S. real GDP average annualized growth 2.00% 2.10% 2.10% 2.20%
U.S. unemployment rate average 4.20% 4.20% 4.20% 4.20%
Forecasted average federal funds rate 3.30% 3.40% 3.70% 3.90%
Moody's Analytics' August 2026 S2 scenario (the "S2 Scenario")        
Financing Receivable, Allowance for Credit Loss [Line Items]        
U.S. real GDP average annualized growth 2.70% 2.70% 2.10% (0.10%)
U.S. unemployment rate average 4.60% 4.60% 5.50% 6.90%
Forecasted average federal funds rate 3.60% 2.90% 2.10% 2.90%