Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
OPERATING ACTIVITIES
Net income	$ 916.4	$ 641.1
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	38.8	34.1
Amortization of discounts and fees	5.8	5.1
Stock-based compensation expense	37.9	35.9
Equity in earnings of unconsolidated entities	(0.9)	(0.5)
Distributions of earnings of unconsolidated entities	0.0	0.5
Deferred income taxes	10.0	12.6
Inventory and land option charges	12.8	21.8
Gain on sale of assets	(59.5)	(31.3)
Changes in operating assets and liabilities:
Increase in construction in progress and finished homes	(724.4)	(755.2)
Increase in residential land and lots – developed, under development, held for development and held for sale	(324.2)	(445.6)
Increase in other assets	(153.1)	(39.9)
Net increase in mortgage loans held for sale	(307.4)	0.0
Increase in accounts payable, accrued expenses and other liabilities	152.7	59.7
Net cash used in operating activities	(395.1)	(461.7)
INVESTING ACTIVITIES
Expenditures for property and equipment	(47.6)	(69.8)
Proceeds from sale of assets	129.8	83.8
Expenditures related to rental properties	(113.0)	(28.3)
Return of investment in unconsolidated entities	2.4	4.4
Net principal increase of other mortgage loans and real estate owned	(0.6)	(1.6)
Payments related to business acquisitions	(5.6)	(309.6)
Net cash (used in) provided by investing activities	(34.6)	(321.1)
FINANCING ACTIVITIES
Proceeds from notes payable	1,591.3	1,815.0
Repayment of notes payable	(918.9)	(1,531.0)
Advances on mortgage repurchase facility, net	297.6	53.0
Proceeds from stock associated with certain employee benefit plans	12.9	22.3
Cash paid for shares withheld for taxes	(38.1)	(19.5)
Cash dividends paid	(128.7)	(111.9)
Repurchases of common stock	(360.4)	(216.2)
Distributions to noncontrolling interests, net	(0.4)	(3.7)
Proceeds from (Payments for) Other Financing Activities	(2.3)	0.0
Net cash (used in) provided by financing activities	453.0	8.0
Net increase (decrease) in cash, cash equivalents and restricted cash	23.3	(774.8)
Cash, cash equivalents and restricted cash at beginning of period	1,514.0	1,506.0
Cash, cash equivalents and restricted cash at end of period	1,537.3	731.2
SUPPLEMENTAL DISCLOSURES OF NON-CASH ACTIVITIES:
Notes payable issued for inventory	0.0	80.8
Stock issued under employee incentive plans	84.3	49.0
Accrued expenditures for property and equipment	8.6	10.9
Accrual for holdback payment related to acquisition	$ 3.9	$ 16.3