Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Stock Repurchases (Details)

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Stockholders' Equity - Stock Repurchases (Details) - USD ($)
 3 Months Ended
Nov. 30, 2020
Aug. 31, 2019
Jan. 07, 2021
Jan. 31, 2018
Equity, Class of Treasury Stock [Line Items]        
Dollar Value of Shares Repurchased   $ 50,000,000.0    
Class A and Class B | 2018 Authorization        
Equity, Class of Treasury Stock [Line Items]        
Repurchase Authorization       $ 3,000,000,000.0
Class A and Class B | 2021 Authorization | Subsequent event        
Equity, Class of Treasury Stock [Line Items]        
Repurchase Authorization     $ 2,000,000,000.0  
Class A | 2018 Authorization        
Equity, Class of Treasury Stock [Line Items]        
Dollar Value of Shares Repurchased $ 1,045,900,000      
Number of shares repurchased (in shares) 4,897,605