Summary of Option Activity (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	6 Months Ended
	May 31, 2012	May 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at beginning of period, Number of Shares	6.6	7.4
Granted, Number of Shares	0.8	0.9
Exercised, Number of Shares	(1.0)	(1.0)
Outstanding at end of period, Number of Shares	6.4	7.3
Exercisable at end of period, Number of Shares	4.1	5.0
Outstanding at beginning of period, Weighted-Average Exercise Price	$ 34.98	$ 32.01
Granted, Weighted-Average Exercise Price	$ 54.24	$ 47.40
Exercised, Weighted-Average Exercise Price	$ 28.46	$ 28.11
Outstanding at end of period, Weighted-Average Exercise Price	$ 38.71	$ 34.62
Exercisable at end of period, Weighted-Average Exercise Price	$ 34.56	$ 32.11