Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details 1)

v3.20.1
Stockholders' Equity (Details 1) - USD ($)
 12 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Feb. 28, 2018
Jan. 31, 2018
Nov. 30, 2016
Equity, Class of Treasury Stock [Line Items]          
Dollar Value of Shares Repurchased $ 50,000,000.0 $ 504,300,000 $ 1,038,500,000    
Class A and Class B [Member] | 2017 Authorization [Member]          
Equity, Class of Treasury Stock [Line Items]          
Repurchase Authorization         $ 1,000,000,000.0
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]          
Equity, Class of Treasury Stock [Line Items]          
Dollar Value of Shares Repurchased $ 50,000,000.0 $ 504,300,000 $ 1,038,500,000    
Number of Shares Repurchased 265,593 2,352,145 4,810,061    
Class A Common Stock [Member] | 2017 Authorization [Member]          
Equity, Class of Treasury Stock [Line Items]          
Dollar Value of Shares Repurchased $ 0 $ 0 $ 546,900,000    
Number of Shares Repurchased 0 0 2,530,194    
Class A Common Stock [Member] | 2018 Authorization [Member]          
Equity, Class of Treasury Stock [Line Items]          
Dollar Value of Shares Repurchased $ 50,000,000.0 $ 504,300,000 $ 491,600,000    
Number of Shares Repurchased 265,593 2,352,145 2,279,867    
Remaining authorized repurchase amount $ 1,954,100,000