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Subsequent Events (Details)
$ in Millions
6 Months Ended
May 31, 2017
position
Jan. 27, 2017
USD ($)
Forecast [Member]    
Subsequent Event [Line Items]    
Expected number of positions to be eliminated | position 450  
Expected reduction as % of global workforce (over 20%) 20.00%  
Minimum [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Expected cost   $ 17
Maximum [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Expected cost   20
Employee Severance and Related Benefits [Member] | Minimum [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Expected cost   16
Employee Severance and Related Benefits [Member] | Maximum [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Expected cost   17
Office Consolidations [Member] | Minimum [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Expected cost   1
Office Consolidations [Member] | Maximum [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Expected cost   $ 3