Stockholders' Equity (Schedule Of Changes In Equity) (Details) - USD ($)
 3 Months Ended
Jun. 18, 2021
Feb. 28, 2022
Feb. 28, 2021
Mar. 31, 2022
Oct. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Balance, beginning   $ 20,996,282,000 [1] $ 18,099,401,000    
Net earnings (including net earnings attributable to noncontrolling interests)   509,315,000 1,016,909,000    
Employee stock and directors plans   (54,886,000) (26,279,000)    
Purchases of treasury stock   (526,361,000) (43,110,000)    
Amortization of restricted stock   81,457,000 48,818,000    
Cash dividends   (110,122,000) (77,843,000)    
Receipts related to noncontrolling interests   6,984,000 8,896,000    
Payments related to noncontrolling interests   (59,388,000) (11,397,000)    
Non-cash purchase or activity of noncontrolling interests, net   1,124,000 2,998,000    
Total other comprehensive income, net of tax   3,027,000 (942,000)    
Balance, ending   20,847,432,000 [1] $ 19,017,451,000    
Cash dividends (in dollars per share) $ 0.375   $ 0.250    
Stock repurchase program, authorized value         $ 1,000,000,000
Stock repurchase program, authorized shares (in shares)         25,000,000
Additional Paid - in Capital          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Balance, beginning   8,807,891,000 $ 8,676,056,000    
Employee stock and directors plans   (140,000) (59,000)    
Amortization of restricted stock   81,457,000 48,818,000    
Non-cash purchase or activity of noncontrolling interests, net   (34,057,000) (623,000)    
Balance, ending   8,855,151,000 8,724,192,000    
Treasury Stock          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Balance, beginning   (2,709,448,000) (1,279,227,000)    
Employee stock and directors plans   (54,939,000) (26,373,000)    
Purchases of treasury stock   (526,361,000) (43,110,000)    
Balance, ending   (3,290,748,000) (1,348,710,000)    
Accumulated Other Comprehensive Income (loss)          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Balance, beginning   (1,341,000) (805,000)    
Total other comprehensive income, net of tax   3,027,000 (942,000)    
Balance, ending   1,686,000 (1,747,000)    
Retained Earnings          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Balance, beginning   14,685,329,000 10,564,994,000    
Net earnings (including net earnings attributable to noncontrolling interests)   503,581,000 1,001,369,000    
Cash dividends   (110,122,000) (77,843,000)    
Balance, ending   15,078,788,000 11,488,520,000    
Noncontrolling Interests          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Balance, beginning   179,857,000 104,545,000    
Net earnings (including net earnings attributable to noncontrolling interests)   5,734,000 15,540,000    
Receipts related to noncontrolling interests   6,984,000 8,896,000    
Payments related to noncontrolling interests   (59,388,000) (11,397,000)    
Non-cash purchase or activity of noncontrolling interests, net   35,181,000 3,621,000    
Balance, ending   $ 168,368,000 $ 121,205,000    
Common Class A          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Shares repurchased during period (in shares)   4,616,000 510,000    
Total purchase price   $ 472,924,000 $ 43,100,000    
Average share price of shares repurchased (in dollars per share)   $ 102.45 $ 84.51    
Common Class A | Common Stock          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Balance, beginning   $ 30,050,000 $ 29,894,000    
Employee stock and directors plans   193,000 153,000    
Balance, ending   $ 30,243,000 $ 30,047,000    
Common Class B          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Shares repurchased during period (in shares)   652,000 0    
Total purchase price   $ 53,331,000 $ 0    
Average share price of shares repurchased (in dollars per share)   $ 81.80 $ 0    
Common Class B | Common Stock          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Balance, beginning   $ 3,944,000 $ 3,944,000    
Balance, ending   $ 3,944,000 $ 3,944,000    
Subsequent Event          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stock repurchase program, authorized value       $ 2,000,000,000  
Stock repurchase program, authorized shares (in shares)       30,000,000  
[1] As of February 28, 2022, total liabilities include $236.4 million related to consolidated VIEs as to which there was no recourse against the Company, of which $23.8 million is included in Homebuilding accounts payable, $182.7 million in Homebuilding liabilities related to consolidated inventory not owned, $18.4 million in Homebuilding senior notes and other debts payable, $7.8 million in Homebuilding other liabilities and $3.8 million in Multifamily liabilities.As of November 30, 2021, total liabilities include $258.5 million related to consolidated VIEs as to which there was no recourse against the Company, of which $26.6 million is included in Homebuilding accounts payable, $196.6 million in Homebuilding liabilities related to consolidated inventory not owned, $20.1 million in Homebuilding senior notes and other debt payable, $12.3 million in Homebuilding other liabilities and $2.8 million in Multifamily liabilities.