Consolidated Statements of Cash Flows $ in Millions	12 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)
OPERATING ACTIVITIES
Net income	$ 2,380.5	$ 1,618.6	$ 1,462.3
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	80.4	72.0	62.4
Amortization of discounts and fees	10.2	10.9	9.9
Stock-based compensation expense	77.8	73.2	55.8
Equity in earnings of unconsolidated entities	(0.7)	(0.5)	(2.8)
Distributions of earnings of unconsolidated entities	0.0	0.5	2.0
Deferred income taxes	14.1	20.1	170.9
Inventory and land option charges	23.8	54.0	50.4
Gain on sale of assets	(59.5)	(53.9)	(18.8)
Changes in operating assets and liabilities:
(Increase) decrease in construction in progress and finished homes	(739.1)	84.6	(482.8)
Increase in residential land and lots — developed, under development, held for development and held for sale	(324.4)	(676.4)	(573.8)
Increase in other assets	(150.7)	(161.6)	(110.6)
Net increase in mortgage loans held for sale	(457.0)	(275.6)	(208.8)
Increase in accounts payable, accrued expenses and other liabilities	566.2	126.2	129.1
Net cash provided by operating activities	1,421.6	892.1	545.2
INVESTING ACTIVITIES
Expenditures for property and equipment	(96.5)	(127.2)	(68.1)
Proceeds from sale of assets	129.8	143.8	292.9
Expenditures related to rental properties	(190.3)	(96.9)	(70.2)
Return of investment in unconsolidated entities	4.3	4.4	17.5
Net principal increase of other mortgage loans and real estate owned	(3.7)	(2.3)	(1.2)
Proceeds from debt securities collateralized by residential real estate	0.0	0.0	7.3
Payments related to business acquisitions, net of cash acquired	(9.7)	(315.8)	(159.2)
Net cash (used in) provided by investing activities	(166.1)	(394.0)	19.0
FINANCING ACTIVITIES
Proceeds from notes payable	2,346.1	2,528.2	2,163.5
Repayment of notes payable	(1,682.9)	(2,686.1)	(2,181.7)
Advances on mortgage repurchase facility, net	243.7	251.2	217.7
Proceeds from stock associated with certain employee benefit plans	23.4	42.7	47.4
Cash paid for shares withheld for taxes	(38.2)	(19.7)	(10.3)
Cash dividends paid	(256.0)	(223.4)	(188.4)
Repurchases of common stock	(360.4)	(479.8)	(127.5)
Distributions to noncontrolling interests, net	(0.7)	(3.9)	(3.2)
Net proceeds from issuance of Forestar common stock	0.0	100.7	0.0
Other financing activities	(4.4)	0.0	0.0
Net cash provided by (used in) financing activities	270.6	(490.1)	(82.5)
Net increase in cash, cash equivalents and restricted cash	1,526.1	8.0	481.7
Total cash, cash equivalents and restricted cash	3,040.1	1,514.0	1,506.0
Supplemental cash flow information:
Income taxes paid, net	581.3	488.0	387.2
Supplemental disclosures of non-cash activities:
Notes payable issued for inventory	5.1	83.6	0.0
Stock issued under employee incentive plans	84.4	49.6	64.0
Accrued expenditures for property and equipment	17.3	14.1	10.7
Accrual for holdback payment related to acquisition	$ 0.7	$ 10.1	$ 0.0