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Summary of Significant Accounting Policies (Details 4)
 12 Months Ended
Dec. 31, 2019
Consumer loans with or without collateral [Member]  
Disclosure of financial assets [line items]  
Term 6 months
Other transactions without collateral [Member]  
Disclosure of financial assets [line items]  
Term 24 months
Commercial loans with collateral [Member]  
Disclosure of financial assets [line items]  
Term 36 months
Mortgage loans [Member]  
Disclosure of financial assets [line items]  
Term 48 months
Consumer leasing [Member]  
Disclosure of financial assets [line items]  
Term 6 months
Other non-mortgage leasing transactions [Member]  
Disclosure of financial assets [line items]  
Term 12 months
Mortgage leasing (household and business) [Member]  
Disclosure of financial assets [line items]  
Term 36 months