Annual report pursuant to Section 13 and 15(d)

Variable Interest Entities (New Markets Tax Credit Entities) (Details)

v3.6.0.2
Variable Interest Entities (New Markets Tax Credit Entities) (Details) - Primary Beneficiary - USD ($)
$ in Millions
12 Months Ended
Dec. 11, 2012
Oct. 03, 2012
Aug. 30, 2011
Dec. 31, 2016
Dec. 31, 2015
Variable Interest Entity [Line Items]          
Tax credit percentage       39.00%  
Restricted cash       $ 0.9 $ 1.1
Percentage of recapture       100.00%  
Recapture period       7 years  
Assets       $ 140.9 140.9
Liabilities       $ 104.2 $ 104.2
NMTC 1          
Variable Interest Entity [Line Items]          
Financial support     $ 58.3    
Interest rate percent on financial support     1.00%    
NMTC 1 | Minimum          
Variable Interest Entity [Line Items]          
Interest rate percent on financial support     1.00%    
NMTC 1 | Maximum          
Variable Interest Entity [Line Items]          
Interest rate percent on financial support     3.96%    
NMTC 2          
Variable Interest Entity [Line Items]          
Financial support   $ 37.7      
Interest rate percent on financial support   1.00%      
NMTC 2 | Minimum          
Variable Interest Entity [Line Items]          
Interest rate percent on financial support   0.7099%      
NMTC 2 | Maximum          
Variable Interest Entity [Line Items]          
Interest rate percent on financial support   0.7693%      
NMTC 3          
Variable Interest Entity [Line Items]          
Financial support $ 8.2        
Interest rate percent on financial support 1.00%        
NMTC 3 | Maximum          
Variable Interest Entity [Line Items]          
Interest rate percent on financial support 1.35%        
US Bancorp [Member] | NMTC 1          
Variable Interest Entity [Line Items]          
Financial support to other entity     $ 22.4    
US Bancorp [Member] | NMTC 2          
Variable Interest Entity [Line Items]          
Financial support to other entity   $ 17.5      
US Bancorp [Member] | NMTC 3          
Variable Interest Entity [Line Items]          
Financial support to other entity $ 3.8        
CDE's | NMTC 1          
Variable Interest Entity [Line Items]          
Financial support to other entity     $ 76.8    
CDE's | NMTC 2          
Variable Interest Entity [Line Items]          
Financial support to other entity   $ 55.2      
CDE's | NMTC 3          
Variable Interest Entity [Line Items]          
Financial support to other entity $ 12.0