v3.26.1
Allowance for Credit Losses (Economic forecast Model Variables) (Details) - Expected
 3 Months Ended 12 Months Ended
Mar. 31, 2029
Mar. 31, 2028
Mar. 31, 2027
Dec. 31, 2026
Moody's Analytics' February 2026 consensus        
Financing Receivable, Allowance for Credit Loss [Line Items]        
U.S. real GDP average annualized growth 2.00% 2.00% 2.00% 2.80%
U.S. unemployment rate average 4.10% 4.20% 4.30% 4.50%
Forecasted average federal funds rate 3.20% 3.30% 3.20% 3.40%
Moody's Analytics' February 2026 S2 scenario (the "S2 Scenario")        
Financing Receivable, Allowance for Credit Loss [Line Items]        
U.S. real GDP average annualized growth 2.50% 2.40% 0.50% 1.60%
U.S. unemployment rate average 4.50% 4.60% 6.60% 5.90%
Forecasted average federal funds rate 3.10% 2.20% 2.20% 3.10%