Fair Value Measurements (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Sep. 30, 2012
Homebuilding [Member]
Fair value measurements of assets on a non-recurring basis
Minimum Range Of Discount Rates For Communities	12.00%
Maximum Range Of Discount Rates For Communities	16.00%
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Homebuilding [Member]
Fair value measurements of assets on a non-recurring basis
Inventory held and used	$ 0	[1],[2]	$ 1.2	[1],[2]
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Financial Services [Member]
Fair value measurements of assets on a non-recurring basis
Other mortgage loans	23.7	[2],[3]	25.8	[2],[3]
Real estate owned	$ 0.7	[2],[3]	$ 0.9	[2],[3]

[1] In performing its impairment analysis in the periods presented, the Company used discount rates ranging from 12% to 16%.

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

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