Stock-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Feb. 29, 2012	Feb. 28, 2011
Stock-Based Compensation [Abstract]
Outstanding at beginning of period, Number of Shares	6.6	7.4
Exercised, Number of Shares	(0.7)	(0.6)
Cancelled, Number of Shares
Outstanding at end of February, Number of Shares	5.9	6.8
Exercisable at end of February, Number of Shares	3.6	4.6
Outstanding at beginning of period, Weighted-Average Exercise Price	$ 34.98	$ 32.01
Exercised, Weighted-Average Exercise Price	$ 27.57	$ 26.93
Outstanding at end of February, Weighted-Average Exercise Price	$ 35.80	$ 32.49
Exercisable at end of February, Weighted-Average Exercise Price	$ 33.12	$ 31.40

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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.

+ References

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- Definition

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 weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

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- Definition

For presentations that combine terminations, 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 or that expired.

+ References

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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

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