Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
OPERATING ACTIVITIES
Net income	$ 2,139.4	$ 1,917.9
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	41.1	46.5
Stock-based compensation expense	65.9	51.3
Deferred income taxes	19.9	28.7
Inventory and land option charges	19.6	51.4
Changes in operating assets and liabilities:
(Increase) decrease in construction in progress and finished homes	(709.1)	537.3
Increase in residential land and lots – developed, under development, held for development and held for sale	(1,371.1)	(668.7)
Increase in rental properties	(386.9)	(689.2)
Decrease in other assets	27.6	339.8
(Increase) decrease in mortgage loans held for sale	(152.5)	262.0
Decrease in accounts payable, accrued expenses and other liabilities	(164.0)	(403.4)
Net cash (used in) provided by operating activities	(470.1)	1,473.6
INVESTING ACTIVITIES
Expenditures for property and equipment	(71.3)	(79.2)
Proceeds from sale of assets	9.9	0.0
Payments related to business acquisitions, net of cash acquired	(1.0)	(103.5)
Other investing activities	(3.6)	2.1
Net cash used in investing activities	(66.0)	(180.6)
FINANCING ACTIVITIES
Proceeds from notes payable	985.0	575.0
Repayment of notes payable	(400.0)	(650.0)
Borrowings (payments) on mortgage repurchase facilities, net	214.4	(63.4)
Proceeds from stock associated with certain employee benefit plans	12.2	12.9
Cash paid for shares withheld for taxes	(81.6)	(55.8)
Cash dividends paid	(199.1)	(171.7)
Repurchases of common stock	(794.5)	(419.8)
Net proceeds from issuance of Forestar common stock	19.7	0.0
Net other financing activities	(26.7)	(18.5)
Net cash used in financing activities	(270.6)	(791.3)
Net (decrease) increase in cash, cash equivalents and restricted cash	(806.7)	501.7
Cash, cash equivalents and restricted cash at beginning of period	3,900.1	2,572.9
Cash, cash equivalents and restricted cash at end of period	3,093.4	3,074.6
SUPPLEMENTAL DISCLOSURES OF NON-CASH ACTIVITIES:
Notes payable issued for inventory	18.9	31.2
Stock issued under employee incentive plans	$ 151.3	$ 107.4