Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
OPERATING ACTIVITIES
Net income	$ 725.1	$ 602.6
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	40.4	41.4
Amortization of discounts and fees	3.9	4.1
Stock based compensation expense	40.4	36.8
Excess income tax benefit from employee stock awards	(10.5)	(6.3)
Deferred income taxes	92.0	46.7
Inventory and land option charges	19.9	16.0
Gain on sale of debt securities collateralized by residential real estate	0.0	(4.5)
Changes in operating assets and liabilities:
Increase in construction in progress and finished homes	(870.9)	(879.1)
(Increase) decrease in residential land and lots – developed, under development, held for development and held for sale	(352.2)	151.3
Increase in other assets	(29.5)	(4.6)
Decrease (increase) in mortgage loans held for sale	26.2	(3.5)
Increase in accounts payable, accrued expenses and other liabilities	124.4	87.7
Net cash (used in) provided by operating activities	(190.8)	88.6
INVESTING ACTIVITIES
Purchases of property and equipment	(103.5)	(65.2)
Increase in restricted cash	(9.9)	(2.1)
Net principal decrease of other mortgage loans and real estate owned	5.3	4.3
(Purchases of) proceeds from debt securities collateralized by residential real estate	(8.8)	35.8
Payments related to acquisition of a business	(4.1)	0.0
Net cash used in investing activities	(121.0)	(27.2)
FINANCING ACTIVITIES
Proceeds from notes payable	700.4	26.3
Repayment of notes payable	(1,051.4)	(543.9)
Proceeds from stock associated with certain employee benefit plans	34.3	61.8
Excess income tax benefit from employee stock awards	10.5	6.3
Cash dividends paid	(112.2)	(88.9)
Repurchases of Common Stock	(60.6)	0.0
Net cash used in financing activities	(479.0)	(538.4)
DECREASE IN CASH AND CASH EQUIVALENTS	(790.8)	(477.0)
Cash and cash equivalents at beginning of period	1,303.2	1,383.8
Cash and cash equivalents at end of period	512.4	906.8
Supplemental disclosures of non-cash activities:
Notes payable issued for inventory	4.5	4.2
Stock issued under employee incentive plans	$ 31.8	$ 19.9