Securitizations and Variable Interest Entities Schedule of Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2012	Jun. 30, 2013 Salus Capital Partners L L C [Member] Variable Interest Entity, Primary Beneficiary [Member]	Feb. 14, 2013 Salus Capital Partners L L C [Member] Variable Interest Entity, Primary Beneficiary [Member]	Jun. 30, 2013 Maximum [Member] Salus Capital Partners L L C [Member] Variable Interest Entity, Primary Beneficiary [Member]	Feb. 14, 2013 Maximum [Member] Salus Capital Partners L L C [Member] Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Principal Amount Outstanding on Loans Securitized or Asset-backed Financing Arrangement			$ 57.5	$ 63.5
Asset-backed loans	430.2	180.1		175.5	225.0	250.0
Variable Interest Entity, Consolidated, Carrying Amount, Asset-Backed Loans Receivable			212.0
Variable Interest Entity, Consolidated, Carrying Amount, Asset-Backed Loans Receivable, Portion Sellers Interest			$ 62.5