Stock-Based Compensation (Narrative) (Details) - metric	3 Months Ended	12 Months Ended
Feb. 28, 2019	Feb. 28, 2018	Nov. 30, 2017	Nov. 30, 2016
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation award service period (in years)	3 years	3 years	3 years	3 years
Number of performance metrics	2	2
Percentage of shares based on market condition of total shareholder return	50.00%	50.00%
Award market condition period	3 years	3 years
Percentage of shares based on cumulative performance condition	50.00%	50.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation award service period (in years)	4 years

Share-based Compensation Arrangement by Share-based Payment Award, Award Market Condition Period

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Number of Performance Metrics

+ References

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Shares Based on Cumulative Performance Condition

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Shares Based on Market Condition of Total Shareholder Return

+ References

No definition available.

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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