Stock-Based Compensation (Summary Of Our Stock Options Outstanding And Exercisable) (Details) shares in Millions	12 Months Ended
	Nov. 30, 2017 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, Shares | shares	4.8
Options outstanding, Weighted-average remaining life (yrs)	5 years 4 months
Options outstanding, Weighted-average exercise price (usd per share)	$ 71.91
Options exercisable, Shares | shares	3.8
Options exercisable, Weighted-average remaining life (yrs)	4 years 5 months
Options exercisable, Weighted-average exercise price (usd per share)	$ 65.34
$29.50-$54.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise price, lower limit	29.50
Range of exercise price, upper limit	$ 54.00
Options outstanding, Shares | shares	1.0
Options outstanding, Weighted-average remaining life (yrs)	2 years 8 months
Options outstanding, Weighted-average exercise price (usd per share)	$ 42.54
Options exercisable, Shares | shares	1.0
Options exercisable, Weighted-average remaining life (yrs)	2 years 8 months
Options exercisable, Weighted-average exercise price (usd per share)	$ 42.54
$54.01-$78.50 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise price, lower limit	54.01
Range of exercise price, upper limit	$ 78.50
Options outstanding, Shares | shares	2.5
Options outstanding, Weighted-average remaining life (yrs)	6 years
Options outstanding, Weighted-average exercise price (usd per share)	$ 69.12
Options exercisable, Shares | shares	2.4
Options exercisable, Weighted-average remaining life (yrs)	5 years 11 months
Options exercisable, Weighted-average exercise price (usd per share)	$ 68.69
$79.01-$100.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of exercise price, lower limit	78.51
Range of exercise price, upper limit	$ 103.00
Options outstanding, Shares | shares	1.3
Options outstanding, Weighted-average remaining life (yrs)	8 years 9 months
Options outstanding, Weighted-average exercise price (usd per share)	$ 98.92
Options exercisable, Shares | shares	0.4
Options exercisable, Weighted-average remaining life (yrs)	8 years 3 months
Options exercisable, Weighted-average exercise price (usd per share)	$ 99.38