Other Assets, Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2018	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2016
Other assets
Earnest money and refundable deposits	$ 386.8	$ 312.2
Insurance receivables	56.0	74.4	$ 82.6
Other receivables	83.8	60.0
Prepaid assets	19.0	30.8
Rental properties	38.5	52.0
Other	58.0	36.5
Other assets	642.1	565.9
Accrued expenses and other liabilities
Reserves for legal claims	407.8	420.6	$ 453.5	$ 423.5
Employee compensation and related liabilities	211.9	197.9
Warranty liability	176.4	143.7
Accrued interest	34.9	11.9
Federal and state income tax liabilities	40.0	20.3
Inventory related accruals	28.7	24.8
Customer deposits	61.0	44.9
Accrued property taxes	25.7	33.9
Other	88.2	87.0
Accrued expenses and other liabilities	$ 1,074.6	$ 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).