Stock-Based Compensation-Summary of Stock Option Activity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at end of period, Number of Shares	4.6	5.9
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of period, Number of Shares	5.1	6.6
Exercised, Number of Shares	0.5	0.7
Excercisable at end of the period, Number of Shares	2.2	3.6
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of period, Weighted-Average Exercise Price	$ 40.06	$ 34.98
Exercised, Weighted-Average Exercise Price	$ 29.96	$ 27.57
Outstanding at beginning of period, Weighted-Average Exercise Price	$ 41.15	$ 35.80
Exercisable at end of the period, Weighted-Average Exercise Price	$ 36.10	$ 33.12