XML 102 R60.htm IDEA: XBRL DOCUMENT v3.19.3
Stockholders' Equity (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Class of Stock [Line Items]                        
Noncontrolling Interest, Ownership Percentage by Parent   66.00% 75.00%             66.00%    
Common Stock Available for Issuance, Value Remaining   $ 394,300,000               $ 394,300,000    
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]                        
Common stock, shares issued   392,172,821       388,120,243       392,172,821 388,120,243  
Common stock, shares outstanding   368,431,454       376,261,635       368,431,454 376,261,635  
Preferred stock, shares issued   0       0       0 0  
Treasury Stock, Common, Shares                   11,900,000    
Payments for Repurchase of Common Stock                   $ 479,800,000 $ 127,500,000 $ 60,600,000
Amount of stock repurchase authorization     $ 1,000,000,000.0                  
Amount remaining under stock repurchase authorization   $ 895,700,000               895,700,000    
Proceeds from Issuance of Common Stock                   $ 100,700,000 $ 0 $ 0
Dividends, Common Stock [Abstract]                        
Cash dividends declared per common share   $ 0.15 $ 0.150 $ 0.150 $ 0.15 $ 0.125 $ 0.125 $ 0.125 $ 0.125      
Cash dividends paid per common share   $ 0.150 $ 0.150 $ 0.150 $ 0.150 $ 0.125 $ 0.125 $ 0.125 $ 0.125 $ 0.6 $ 0.5 $ 0.4
Forestar Group [Member]                        
Class of Stock [Line Items]                        
Equity Securities Registered, Value           $ 500,000,000         $ 500,000,000  
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]                        
Common stock, shares issued   6,000,000.0               6,000,000.0    
Shares Issued, Price Per Share   $ 17.50               $ 17.50    
Subsequent Event [Member]                        
Dividends, Common Stock [Abstract]                        
Cash dividends declared per common share $ 0.175