Mortgage Loans (Details 1) (Financial Services [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2012	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	5.1	5.0
Real Estate Owned [Member]
Loss reserves related to:
Loss reserves related to mortgage operations	0.5	0.4
Loan repurchase and settlement obligations - known and expected [Member]
Loss reserves related to:
Loss reserves related to mortgage operations	$ 25.0	$ 25.5