Fair Value Measurements (Details 1) (Fair Value, Inputs, Level 3 [Member], Fair Value, Measurements, Nonrecurring [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Sep. 30, 2011
Homebuilding [Member]
Fair value measurements of assets on a non-recurring basis
Inventory held and used	$ 6.6	[1]	$ 26.9	[1]
Financial Services [Member]
Fair value measurements of assets on a non-recurring basis
Other mortgage loans	27.4	[1],[2]	28.9	[1],[2]
Real estate owned	$ 0.8	[1],[2]	$ 0.5	[1],[2]

[1] The fair values included in the table above represent only those assets whose carrying values were adjusted to fair value in the current quarter.

[2] The fair values for other mortgage loans and real estate owned are determined based on the value of the underlying collateral.