Other Assets and Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Other assets
Earnest money and refundable deposits	$ 345.6	$ 312.2
Insurance receivables	73.1	74.4	$ 84.7
Other receivables	79.9	60.0
Prepaid assets	32.2	30.8
Rental properties	38.5	52.0
Other	52.7	36.5
Other assets	622.0	565.9
Accrued expenses and other liabilities
Reserves for legal claims	419.7	420.6	435.6	$ 423.5
Employee compensation and related liabilities	187.2	197.9
Warranty liability	149.4	143.7	$ 107.8	$ 104.4
Accrued interest	35.0	11.9
Federal and state income tax liabilities	85.7	20.3
Inventory related accruals	24.6	24.8
Customer deposits	53.6	44.9
Accrued property taxes	25.0	33.9
Other	87.9	87.0
Accrued expenses and other liabilities	$ 1,068.1	$ 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).