Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount		$ 4,000.0
Treasury Stock, Shares, Acquired		6,800,000
Payments for Repurchase of Common Stock		$ 1,100.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 2,500.0
Cash dividends paid per common share (in dollars per share)		$ 0.40
Divedends declared (in dollars per sh		$ 0.40	$ 0.30
Cash dividends declared		$ (128.5)	$ (99.9)
Retained Earnings [Member]
Class of Stock [Line Items]
Cash dividends declared		(128.5)	$ (99.9)
Subsequent Event [Member]
Class of Stock [Line Items]
Divedends declared (in dollars per sh	$ 0.40
Forestar Group [Member]
Class of Stock [Line Items]
Equity Securities Registered, Value		750.0
At-the-market Equity Offering Program, Common Stock Available for Issuance		$ 300.0
At-the-market Equity Offering Program, Common Stock Issued		0
Common Stock Available for Issuance, Value Remaining		$ 750.0