Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
OPERATING ACTIVITIES
Net income	$ 352.8	$ 290.4
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	27.6	25.4
Amortization of discounts and fees	2.8	2.7
Stock based compensation expense	24.3	22.4
Excess income tax benefit from employee stock awards	(3.9)	(6.7)
Deferred income taxes	29.6	17.4
Inventory and land option charges	7.9	18.6
Gain on sale of debt securities collateralized by residential real estate	(4.5)	0.0
Changes in operating assets and liabilities:
Increase in construction in progress and finished homes	(652.8)	(375.6)
Decrease (increase) in residential land and lots – developed, under development, held for development and held for sale	235.9	(71.2)
Decrease (increase) in other assets	36.6	(11.1)
Decrease (increase) in mortgage loans held for sale	14.9	(40.7)
Decrease in accounts payable, accrued expenses and other liabilities	(44.3)	(40.4)
Net cash provided by (used in) operating activities	26.9	(168.8)
INVESTING ACTIVITIES
Purchases of property and equipment	(40.4)	(24.0)
Increase in restricted cash	(1.7)	(0.4)
Net principal increase of other mortgage loans and real estate owned	(0.4)	(4.9)
Proceeds from sale of debt securities collateralized by residential real estate	35.8	0.0
Net cash used in investing activities	(6.7)	(29.3)
FINANCING ACTIVITIES
Proceeds from notes payable	17.6	1,350.3
Repayment of notes payable	(170.6)	(1,098.3)
Proceeds from stock associated with certain employee benefit plans	28.4	21.0
Excess income tax benefit from employee stock awards	3.9	6.7
Cash dividends paid	(59.2)	(45.7)
Net cash (used in) provided by financing activities	(179.9)	234.0
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(159.7)	35.9
Cash and cash equivalents at beginning of period	1,383.8	661.8
Cash and cash equivalents at end of period	1,224.1	697.7
Supplemental disclosures of non-cash activities:
Notes payable issued for inventory	2.9	8.1
Stock issued under employee incentive plans	$ 19.7	$ 8.3