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Derivative Financial Instruments Derivative Financial Instruments (Details 2) - Non-hedging - Commercial loan/lease - Interest rate swap
Dec. 31, 2019
Dec. 31, 2018
Interest rate received    
Derivative [Line Items]    
Weighted average fixed interest rate 3.94% 4.24%
Interest rate paid    
Derivative [Line Items]    
Weighted average fixed interest rate 3.26% 4.20%