Mortgage Servicing - Schedule of Composition of Primary Servicing and Subservicing Portfolios by Type of Property Serviced as Measured by UPB (Footnote) (Details) - HLSS [Member] - USD ($) $ in Billions	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Servicing and Subservicing Portfolio [Line Items]
Primary servicing unpaid principal balance	$ 160.8	$ 175.1	$ 79.4
Primary servicing UPB	$ 160.8

Mortgage Servicing - Schedule of Composition of Primary Servicing and Subservicing Portfolios by Type of Property Serviced as Measured by UPB (Footnote) (Details) - HLSS [Member] - USD ($)
$ in Billions

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Schedule of Servicing and Subservicing Portfolio [Line Items]

Primary servicing unpaid principal balance

$ 160.8

$ 175.1

$ 79.4

Primary servicing UPB

$ 160.8