Fair Value Measurements (Details 1) (USD $) In Millions, unless otherwise specified															3 Months Ended
	Jun. 30, 2014 Financial Services [Member]	Sep. 30, 2013 Financial Services [Member]	Jun. 30, 2014 Fair Value, Inputs, Level 3 [Member] Fair Value, Measurements, Nonrecurring [Member] Homebuilding [Member] Inventories [Member]		Sep. 30, 2013 Fair Value, Inputs, Level 3 [Member] Fair Value, Measurements, Nonrecurring [Member] Homebuilding [Member] Inventories [Member]		Jun. 30, 2014 Fair Value, Inputs, Level 3 [Member] Fair Value, Measurements, Nonrecurring [Member] Homebuilding [Member] Assets Held-for-sale [Member]		Sep. 30, 2013 Fair Value, Inputs, Level 3 [Member] Fair Value, Measurements, Nonrecurring [Member] Homebuilding [Member] Assets Held-for-sale [Member]		Jun. 30, 2014 Fair Value, Inputs, Level 3 [Member] Fair Value, Measurements, Nonrecurring [Member] Financial Services [Member]		Sep. 30, 2013 Fair Value, Inputs, Level 3 [Member] Fair Value, Measurements, Nonrecurring [Member] Financial Services [Member]		Jun. 30, 2014 Inventories [Member] Minimum [Member] Homebuilding [Member]	Jun. 30, 2014 Inventories [Member] Maximum [Member] Homebuilding [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate															12.00%	18.00%
Assets, Fair Value Disclosure, Nonrecurring			$ 46.6	[1],[2]	$ 0.5	[1],[2]	$ 8.7	[1],[3]	$ 10.8	[1],[3]
Other mortgage loans											18.8	[1],[4]	22.6	[1],[4]
Real Estate Acquired Through Foreclosure	$ 1.0	$ 1.3									$ 0.8	[1],[4]	$ 0.7	[1],[4]

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

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

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

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