Stock-Based Compensation (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Nov. 30, 2012 award_type	Nov. 30, 2011	Nov. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Stock-based Compensation Award Types	3
Total stock-based compensation expense	$ 20.2	$ 13.0	$ 11.9
Unrecognized stock-based compensation expense	13.3
Weighted average period for unrecognized stock-based compensation to be recognized	1 year 5 months
Intrinsic value of options outstanding	123.9
Intrinsic value for exercisable options	81.1
Total intrinsic value for all options exercised	$ 62.8	$ 32.4	$ 63.9
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Exercisable period	10 years
Weighted-average grant-date fair value of an option granted (usd per share)	$ 7.17	$ 7.99	$ 6.88
Mid-term Incentive Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period for unrecognized stock-based compensation to be recognized	3 years

Number of Stock-based Compensation Award Types

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Exercisable Period

+ References

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

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- Definition

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

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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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.

+ References

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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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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding.

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