Fair Value Measurements (Details 1) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Sep. 30, 2015	Sep. 30, 2014
Financial Services [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real Estate Acquired Through Foreclosure		$ 0.6	$ 0.7
Nonrecurring [Member] | Level 3 [Member] | Financial Services [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other mortgage loans	[1],[2]	15.2	16.0
Real Estate Acquired Through Foreclosure	[1],[2]	0.5	0.5
Inventories [Member] | Nonrecurring [Member] | Level 3 [Member] | Homebuilding [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Inventory held and used	[1],[3]	10.1	19.2
Fair Value Adjusted - Available for Sale [Member] [Member] | Nonrecurring [Member] | Level 3 [Member] | Homebuilding [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Inventory held and used	[1],[4]	$ 2.8	$ 8.2
Minimum [Member] | Inventories [Member] | Homebuilding [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate		12.00%	12.00%
Maximum [Member] | Inventories [Member] | Homebuilding [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate		18.00%	18.00%

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

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

[3] In performing its impairment analysis of communities, discount rates ranging from 12% to 18% were used in the periods presented.

[4] The fair value of inventory available for sale was determined based on recent offers received from outside third parties, comparable sales or actual contracts.