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At-the-market Equity Offering Program, Common Stock Issued

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Common Stock Available for Issuance, Value Remaining

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The dollar amount of equity securities registered under the entity's registration statement.

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Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

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Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.

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Aggregate dividends paid during the period for each share of common stock outstanding.

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Aggregate dividends declared during the period for each share of common stock outstanding.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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The cash outflow to reacquire common stock during the period.

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Number of shares issued for nonredeemable preferred shares and preferred shares redeemable solely at option of issuer. Includes, but is not limited to, preferred shares issued, repurchased, and held as treasury shares. Excludes preferred shares classified as debt.

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended									10 Months Ended	12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jul. 17, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Sep. 23, 2024	Oct. 31, 2021
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common stock, shares issued		402,848,342				401,202,253					402,848,342	401,202,253
Common stock, shares outstanding		324,027,360				334,848,565					324,027,360	334,848,565
Preferred stock, shares issued		0				0					0	0
Amount of stock repurchase authorization		$ 4,000.0									$ 4,000.0
Treasury Stock, Common, Shares											12,500,000
Payments for Repurchase of Common Stock										$ 1,400.0	$ 1,800.0
Amount remaining under stock repurchase authorization		$ 3,600.0									$ 3,600.0
Dividends, Common Stock [Abstract]
Cash dividends declared per common share		$ 0.30	$ 0.30	$ 0.30	$ 0.30	$ 0.25	$ 0.25	$ 0.25	$ 0.25
Cash dividends paid per common share		$ 0.30	$ 0.30	$ 0.30	$ 0.30	$ 0.25	$ 0.25	$ 0.25	$ 0.25		$ 1.20	$ 1.00	$ 0.90
Dividends, Common Stock, Cash											$ 395.2	$ 341.2	$ 316.5
Retained Earnings [Member]
Dividends, Common Stock [Abstract]
Dividends, Common Stock, Cash											395.2	$ 341.2	$ 316.5
Forestar Group [Member]
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Equity Securities Registered, Value		$ 750.0									$ 750.0				$ 750.0
At-the-market Equity Offering Program, Common Stock Available for Issuance															$ 300.0
At-the-market Equity Offering Program, Common Stock Issued											546,174
Common Stock Available for Issuance, Value Remaining														$ 728.1
Dividends, Common Stock [Abstract]
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs											$ 0.4
Stock Issued During Period, Value, New Issues											$ 19.7
Subsequent Event [Member]
Dividends, Common Stock [Abstract]
Cash dividends declared per common share	$ 0.40