Summary of Additional Information Pertaining to Stock-Based Compensation from Stock Options and Stock Awards (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2012	Aug. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, Weighted-average grant-date fair value	$ 10.96	$ 8.89	$ 9.93	$ 10.74
Stock options, Options granted	17	250	189	2,034
Stock options, Options exercised	(697)	(827)	(2,334)	(4,568)
Stock options, Total intrinsic value of stock options exercised	$ 14,627	$ 15,824	$ 46,491	$ 78,946
Stock options, Total unrecognized compensation expense	20,723	28,339	20,723	28,339
Stock awards, Weighted-average grant-date fair value	$ 27.32	$ 24.09	$ 28.29	$ 26.70
Stock awards, Stock awards granted	1,638	7	2,602	1,759
Stock awards, Stock awards vested	(241)	(256)	(1,929)	(2,103)
Stock awards, Total unrecognized compensation expense	$ 115,794	$ 99,272	$ 115,794	$ 99,272
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average remaining recognition period	2 years 3 months 18 days	2 years 8 months 12 days	2 years 3 months 18 days	2 years 8 months 12 days
Stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average remaining recognition period	1 year 10 months 24 days	2 years 4 months 24 days	1 year 10 months 24 days	2 years 4 months 24 days

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Aggregate unrecognized cost of share-based awards, other than options, made to employees under an equity-based compensation plan, that have yet to vest.

+ References

No definition available.

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- Definition

Aggregate unrecognized cost of option awards made to employees under a stock option plan or plans, that have yet to vest.

+ References

No definition available.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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- Definition

The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

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- Definition

Net number of share options (or share units) granted during the period.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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-Name Statement of Financial Accounting Standard (FAS)

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- Definition

Number of share options (or share units) exercised during the current period.

+ References

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