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Earnings Per Share - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 26 Months Ended
Jan. 08, 2021
Nov. 30, 2020
Aug. 31, 2020
Nov. 30, 2019
Aug. 31, 2019
Nov. 30, 2020
Nov. 30, 2019
Jan. 08, 2021
Oct. 29, 2019
Oct. 30, 2018
Earnings Per Share [Abstract]                    
Basic earnings per share from discontinued operations (in dollars per share)   $ 0.00   $ 0   $ 0.00 $ 0      
Diluted earnings per share from discontinued operations (in dollars per share)   $ 0.00   $ 0.00   $ 0.00 $ 0      
Options granted and excluded from the computation of diluted earnings per share (in shares)   200,000   200,000   200,000 300,000      
Equity, Class of Treasury Stock [Line Items]                    
Stock purchased under share buyback   $ 2,371,000 $ 69,011,000 $ 1,911,000 $ 256,830,000          
Shares acquired for employee payroll taxes on restricted stock awards (in shares)   100,000   100,000   200,000 300,000      
Shares acquired for employee payroll taxes on restricted stock awards, average price (in dollars per share)   $ 333.60   $ 259.17   $ 301.01 $ 260.89      
Shares acquired for employee payroll taxes on restricted stock awards   $ 2,400,000   $ 300,000   $ 71,400,000 $ 65,700,000      
Share Buyback Programs                    
Equity, Class of Treasury Stock [Line Items]                    
Stock purchased under share buyback (shares)   0   0   0 800,000      
Stock purchased under share buyback, average price (in dollars per share)             $ 230.66      
Stock purchased under share buyback             $ 193,100,000      
Share Buyback Programs | Subsequent Event                    
Equity, Class of Treasury Stock [Line Items]                    
Stock purchased under share buyback (shares) 0                  
October 30, 2018 Plan                    
Equity, Class of Treasury Stock [Line Items]                    
Share buyback program, authorized amount                   $ 1,000,000,000.0
October 30, 2018 Plan | Subsequent Event                    
Equity, Class of Treasury Stock [Line Items]                    
Stock purchased under share buyback (shares)               4,300,000    
Stock purchased under share buyback, average price (in dollars per share)               $ 219.42    
Stock purchased under share buyback               $ 939,100,000    
October 29, 2019 Plan                    
Equity, Class of Treasury Stock [Line Items]                    
Share buyback program, authorized amount                 $ 1,000,000,000.0