Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
OPERATING ACTIVITIES
Net income	$ 3,269.7	$ 4,247.4
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	70.2	60.2
Stock-based compensation expense	80.6	79.4
Deferred income taxes	19.3	14.3
Inventory and land option charges	62.2	30.6
Changes in operating assets and liabilities:
Decrease (increase) in construction in progress and finished homes	576.2	(3,063.9)
Increase in residential land and lots – developed, under development, held for development and held for sale	(915.0)	(1,005.1)
Increase in rental properties	(777.3)	(1,129.6)
Decrease (increase) in other assets	242.1	(777.3)
Increase in mortgage loans held for sale	(28.4)	(55.2)
(Decrease) increase in accounts payable, accrued expenses and other liabilities	(338.5)	1,036.4
Cash provided by (used in) operating activities	2,261.1	(562.8)
INVESTING ACTIVITIES
Expenditures for property and equipment	(108.3)	(108.0)
Payments related to business acquisitions, net of cash acquired	(202.0)	(271.5)
Other investing activities	1.8	6.6
Net cash used in investing activities	(308.5)	(372.9)
FINANCING ACTIVITIES
Proceeds from notes payable	575.0	2,625.0
Repayment of notes payable	(675.4)	(2,051.2)
Borrowings (payments) on mortgage repurchase facility, net	67.3	(88.9)
Proceeds from stock associated with certain employee benefit plans	18.7	26.9
Cash paid for shares withheld for taxes	(55.9)	(61.8)
Cash dividends paid	(256.9)	(238.4)
Repurchases of common stock	(759.6)	(859.7)
Net proceeds from issuance of Forestar common stock	0.0	1.7
Net other financing activities	(30.7)	29.2
Net cash used in financing activities	(1,117.5)	(617.2)
Net increase (decrease) in cash, cash equivalents and restricted cash	835.1	(1,552.9)
Cash, cash equivalents and restricted cash at beginning of period	2,572.9	3,237.2
Cash, cash equivalents and restricted cash at end of period	3,408.0	1,684.3
SUPPLEMENTAL DISCLOSURES OF NON-CASH ACTIVITIES:
Notes payable issued for inventory	54.5	64.3
Stock issued under employee incentive plans	110.8	130.0
Repurchases of common stock not settled	$ 0.0	$ 20.1