v3.26.1
Stockholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Jun. 30, 2026
Class of Stock [Line Items]                
Stock Repurchase Program, Authorized Amount   $ 5,000.0           $ 5,000.0
Treasury Stock, Shares, Acquired               14,600,000
Payments for Repurchase of Common Stock               $ 2,200.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount   $ 1,100.0           1,100.0
Cash dividends paid per common share (in dollars per share)   $ 0.45 $ 0.45 $ 0.45        
Divedends declared (in dollars per share)   $ 0.45 $ 0.45 $ 0.45 $ 0.40 $ 0.40 $ 0.40  
Cash dividends declared   $ (127.1) $ (129.7) $ (131.5) $ (122.4) $ (125.5) $ (128.5)  
Retained Earnings [Member]                
Class of Stock [Line Items]                
Cash dividends declared   (127.1) $ (129.7) $ (131.5) $ (122.4) $ (125.5) $ (128.5) (388.3)
Subsequent Event [Member]                
Class of Stock [Line Items]                
Divedends declared (in dollars per share) $ 0.45              
Forestar Group [Member]                
Class of Stock [Line Items]                
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