At-the-market Equity Offering Program, Common Stock Available for Issuance

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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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- Definition

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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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

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

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-Topic 505
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-Name Accounting Standards Codification
-Section S99
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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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-Topic 230
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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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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									6 Months Ended	12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common stock, shares issued		404,031,443				402,848,342					404,031,443	402,848,342
Common stock, shares outstanding		294,475,153				324,027,360					294,475,153	324,027,360
Preferred stock, shares issued		0				0					0	0
Amount of stock repurchase authorization		$ 5,000.0									$ 5,000.0
Treasury Stock, Common, Shares											30,700,000
Payments for Repurchase of Common Stock										$ 2,600.0	$ 4,300.0
Amount remaining under stock repurchase authorization		$ 3,300.0									$ 3,300.0
Dividends, Common Stock [Abstract]
Cash dividends declared per common share		$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.30	$ 0.30	$ 0.30	$ 0.30
Cash dividends paid per common share		$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.30	$ 0.30	$ 0.30	$ 0.30		$ 1.60	$ 1.20	$ 1.00
Dividends, Common Stock, Cash											$ 494.8	$ 395.2	$ 341.2
Retained Earnings [Member]
Dividends, Common Stock [Abstract]
Dividends, Common Stock, Cash											494.8	$ 395.2	$ 341.2
Forestar Group [Member]
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Equity Securities Registered, Value		$ 750.0									750.0
At-the-market Equity Offering Program, Common Stock Available for Issuance		300.0									$ 300.0
At-the-market Equity Offering Program, Common Stock Issued											0
Common Stock Available for Issuance, Value Remaining		$ 750.0									$ 750.0
Subsequent Event [Member]
Dividends, Common Stock [Abstract]
Cash dividends declared per common share	$ 0.45