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Business Acquisitions - Schedule of Reconciliation of Beginning and Ending Liability Balance for Termination Costs (Footnote) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Servicing [Member]    
Business Acquisition [Line Items]    
Additions charged to operations $ 14.7 $ 15.9
Lending [Member]    
Business Acquisition [Line Items]    
Additions charged to operations (0.1) 0.7
Corporate and Other [Member]    
Business Acquisition [Line Items]    
Additions charged to operations $ 3.5 $ 4.1