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Stock-Based Compensation (Summary Of Our Stock Options Outstanding And Exercisable) (Details)
shares in Millions
12 Months Ended
Nov. 30, 2018
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding, Shares | shares 3.6
Options outstanding, Weighted-average remaining life (yrs) 5 years 7 months
Options outstanding, Weighted-average exercise price (usd per share) $ 82.60
Options exercisable, Shares | shares 2.8
Options exercisable, Weighted-average remaining life (yrs) 4 years 7 months
Options exercisable, Weighted-average exercise price (usd per share) $ 76.54
$29.00-$55.00 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of exercise price, lower limit 29.00
Range of exercise price, upper limit $ 55.00
Options outstanding, Shares | shares 0.4
Options outstanding, Weighted-average remaining life (yrs) 2 years 11 months
Options outstanding, Weighted-average exercise price (usd per share) $ 50.66
Options exercisable, Shares | shares 0.4
Options exercisable, Weighted-average remaining life (yrs) 2 years 11 months
Options exercisable, Weighted-average exercise price (usd per share) $ 50.66
$55.01-$81.00 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of exercise price, lower limit 55.01
Range of exercise price, upper limit $ 81.00
Options outstanding, Shares | shares 1.6
Options outstanding, Weighted-average remaining life (yrs) 5 years 5 months
Options outstanding, Weighted-average exercise price (usd per share) $ 73.18
Options exercisable, Shares | shares 1.6
Options exercisable, Weighted-average remaining life (yrs) 5 years 5 months
Options exercisable, Weighted-average exercise price (usd per share) $ 73.18
$81.01-$107.00 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of exercise price, lower limit 81.01
Range of exercise price, upper limit $ 107.00
Options outstanding, Shares | shares 1.6
Options outstanding, Weighted-average remaining life (yrs) 8 years 2 months
Options outstanding, Weighted-average exercise price (usd per share) $ 100.67
Options exercisable, Shares | shares 0.8
Options exercisable, Weighted-average remaining life (yrs) 7 years 8 months
Options exercisable, Weighted-average exercise price (usd per share) $ 99.41