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Earnings Per Share (Schedule of Weighted Avergae Number of Shares) (Details) - shares
shares in Millions
12 Months Ended
Nov. 30, 2016
Nov. 30, 2015
Nov. 30, 2014
Weighted Average Number Diluted Shares Outstanding Adjustment [Abstract]      
Options to purchase common stock and restricted shares that were excluded from computation of diluted earnings per share because they were anti-dilutive 1.0 0.9 0.1