Significant Accounting Policies (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Significant Accounting Policies    
Assets under care $ 5,200,000,000 $ 5,000,000,000
Maximum estimated economic life 5 years  
Goodwill    
Goodwill impairment $ 0 $ 0
Maximum | Commercial    
Premises and Equipment    
Estimated Useful Life 3 years  
Buildings and improvements | Minimum    
Premises and Equipment    
Estimated Useful Life 3 years  
Buildings and improvements | Maximum    
Premises and Equipment    
Estimated Useful Life 40 years  
Furniture and equipment | Minimum    
Premises and Equipment    
Estimated Useful Life 3 years  
Furniture and equipment | Maximum    
Premises and Equipment    
Estimated Useful Life 10 years