Current report filing

Stockholders' Equity (Details 1)

v3.8.0.1
Stockholders' Equity (Details 1) - USD ($)
3 Months Ended 12 Months Ended
Feb. 28, 2017
Feb. 28, 2017
Feb. 28, 2017
Feb. 29, 2016
Nov. 30, 2016
Apr. 30, 2012
Equity, Class of Treasury Stock [Line Items]            
Dollar Value of Shares Repurchased     $ 1,122,700,000 $ 33,800,000    
Class A and Class B [Member] | 2013 Authorization [Member]            
Equity, Class of Treasury Stock [Line Items]            
Repurchase Authorization           $ 1,000,000,000.0
Class A and Class B [Member] | 2017 Authorization [Member]            
Equity, Class of Treasury Stock [Line Items]            
Repurchase Authorization         $ 1,000,000,000  
Class A Common Stock [Member] | 2013 Authorization [Member]            
Equity, Class of Treasury Stock [Line Items]            
Dollar Value of Shares Repurchased $ 1,000,000,000   $ 669,600,000      
Number of Shares Repurchased 18,670,632   4,400,504      
Class A Common Stock [Member] | 2017 Authorization [Member]            
Equity, Class of Treasury Stock [Line Items]            
Dollar Value of Shares Repurchased $ 453,100,000 $ 453,100,000        
Number of Shares Repurchased 3,006,547 3,006,547