Annual report pursuant to Section 13 and 15(d)

Variable Interest Entities (Details)

v2.4.0.8
Variable Interest Entities (Details) (Primary Beneficiary [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Aug. 30, 2011
NMTC 1 [Member]
Aug. 30, 2011
NMTC 1 [Member]
Minimum [Member]
Aug. 30, 2011
NMTC 1 [Member]
Maximum [Member]
Aug. 30, 2011
NMTC 1 [Member]
US Bancorp [Member]
Aug. 30, 2011
NMTC 1 [Member]
CDE's [Member]
Oct. 03, 2013
NMTC 2 [Member]
Oct. 03, 2013
NMTC 2 [Member]
Minimum [Member]
Oct. 03, 2013
NMTC 2 [Member]
Maximum [Member]
Oct. 03, 2013
NMTC 2 [Member]
US Bancorp [Member]
Oct. 03, 2013
NMTC 2 [Member]
CDE's [Member]
Dec. 11, 2011
NMTC 3 [Member]
Dec. 11, 2011
NMTC 3 [Member]
Maximum [Member]
Dec. 11, 2011
NMTC 3 [Member]
US Bancorp [Member]
Dec. 11, 2011
NMTC 3 [Member]
CDE's [Member]
Variable Interest Entity [Line Items]                                
Financial support $ 59.3   $ 58.3         $ 37.7         $ 8.2      
Tax credit percentage 39.00%                              
Interest rate percent on financial support     1.00% 1.00% 3.96%     1.00% 0.7099% 0.7693%     1.00% 1.35%    
Financial support to other entity           22.4 76.8       17.5 55.2     3.8 12.0
Restricted cash 6.9 30.9                            
Percentage of recapture 100.00%                              
Recapture period 7 years                              
Assets and liabilities $ 140.9 $ 104.2