Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended							6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2023	Apr. 01, 2023	Apr. 30, 2022	Oct. 31, 2021
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount										$ 1,000.0
Treasury Stock, Shares, Acquired								4,500,000
Payments for Repurchase of Common Stock								$ 421.3
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 17.0						17.0
Divedends declared (in dollars per sh		$ 0.25	$ 0.25	$ 0.225	$ 0.225	$ 0.225	$ 0.225
Cash dividends paid per common share (in dollars per share)		$ 0.25	$ 0.25	$ 0.225	$ 0.225	$ 0.225	$ 0.225
Subsequent Event [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount									$ 1,000.0
Divedends declared (in dollars per sh	$ 0.25
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		$ 298.2						298.2			$ 300.0
Common Stock Available for Issuance, Value Remaining		$ 748.2						$ 748.2
At-the-market Equity Offering Program, Common Stock Issued								0