Mortgage Loans (Details 1) (Financial Services [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Sep. 30, 2012
Loss reserves related to:
Loss reserves related to mortgage operations	$ 30.6	$ 30.9
Other Mortgage Loans [Member]
Loss reserves related to:
Loss reserves related to mortgage operations	4.2	5.0
Real Estate Owned [Member]
Loss reserves related to:
Loss reserves related to mortgage operations	0.3	0.4
Loan repurchase and settlement obligations - known and expected [Member]
Loss reserves related to:
Loss reserves related to mortgage operations	$ 26.1	$ 25.5