Employee Benefit and Stock Plans (Details) (USD $)	12 Months Ended
Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Stock option transactions
Options outstanding at beginning of year, Options	10,105,546	10,160,396	8,798,613
Options outstanding at beginning of year, Weighted Average Exercise Price in dollars per share	$ 21.27	$ 21.27	$ 24.19
Granted, Options	550,000	30,000	1,716,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price in dollars per share	$ 16.63	$ 9.08	$ 6.36
Exercised, Shares	(118,208)	(7,494)	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price in dollars per share	$ 13.46	$ 13.93	$ 0.00
Cancelled, Options	(5,400)	(77,356)	(354,217)
Cancelled, Weighted Average Exercise Price in dollars per share	$ 24.24	$ 17.96	$ 21.47
Options outstanding at end of year, Options	10,531,938	10,105,546	10,160,396
Options outstanding at end of year, Weighted Average Exercise Price in dollars per share	$ 21.11	$ 21.27	$ 21.27
Options exercisable at end of year, Options	9,414,935	8,533,224	7,142,568
Options exercisable at end of period, Weighted Average Exercise Price in dollars per share	$ 22.26	$ 23.76	$ 26.43
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	746,043	1,721,847	2,477,219
Performance Based Incentive Plan for Senior Management [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based payments award terms of Award	15 years
1988 Employee Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based payments award terms of Award	15 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	385,049	227,049
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	158,000	227,049
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 16.63	$ 16.23
Weighted average per share grant date fair value in dollars per share	$ 16.39	$ 16.23	$ 0.00

Share based compensation arrangement by share based payments award terms of award.

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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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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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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

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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-Publisher FASB

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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-Publisher FASB

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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No definition available.

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

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