Other Assets, Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2018	Sep. 30, 2017	Mar. 31, 2017	Sep. 30, 2016
Other assets
Earnest money and refundable deposits	$ 340.0	$ 312.2
Insurance receivables	69.0	74.4	$ 85.1
Other receivables	78.0	60.0
Prepaid assets	23.3	30.8
Rental properties	39.2	52.0
Other	58.2	36.5
Other assets	607.7	565.9
Accrued expenses and other liabilities
Reserves for legal claims	443.6	420.6	$ 441.5	$ 423.5
Employee compensation and related liabilities	203.5	197.9
Warranty liability	162.6	143.7
Accrued interest	13.5	11.9
Federal and state income tax liabilities	7.7	20.3
Inventory related accruals	29.7	24.8
Customer deposits	57.9	44.9
Accrued property taxes	21.4	33.9
Other	89.7	87.0
Accrued expenses and other liabilities	$ 1,029.6	$ 985.0

Carrying amount as of the balance sheet date, net of allowance for doubtful accounts, of account and note receivables due from other than related parties.

Name:	us-gaap_AccountsAndNotesReceivableNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).