XML 65 R51.htm IDEA: XBRL DOCUMENT v3.8.0.1
Fair Value - Schedule of Fair Value Assets and Liabilities (Footnote) (Details) - Impaired Government Insured Stratum [Member]
$ in Millions
Dec. 31, 2017
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Valuation allowance $ 24.8
Carrying Value [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
MSRs, at amortized cost $ 158.0