Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details 1)

v3.19.3
Stockholders' Equity (Details 1) - USD ($)
3 Months Ended 6 Months Ended
Aug. 31, 2019
Aug. 31, 2019
Aug. 31, 2018
May 31, 2018
Aug. 31, 2019
Jan. 31, 2018
Equity, Class of Treasury Stock [Line Items]            
Dollar Value of Shares Repurchased   $ 50,000,000.0 $ 404,300,000 $ 100,000,000.0    
Class A and Class B [Member] | 2018 Authorization [Member]            
Equity, Class of Treasury Stock [Line Items]            
Repurchase Authorization           $ 3,000,000,000.0
Class A Common Stock [Member] | 2018 Authorization [Member]            
Equity, Class of Treasury Stock [Line Items]            
Dollar Value of Shares Repurchased $ 1,045,900,000       $ 50,000,000.0  
Number of Shares Repurchased 4,897,605       265,593