Employee Benefit and Stock Plans (Details 1) (USD $)	12 Months Ended
Nov. 30, 2012
$ 6.32 to $10.54
Stock options outstanding and stock options exercisable
Range of Exercise Price, Minimum	$ 6.32
Range of Exercise Price, Maximum	$ 10.54
Options Outstanding, Options	1,704,998
Options Outstanding, Weighted Average Exercise Price	$ 6.43
Options Outstanding, Weighted Average Remaining Contractual Life	8 years 9 months 18 days
Options Exercisable, Options	567,674
Options Exercisable, Weighted Average Exercise Price	$ 6.44
$10.55 to $14.96
Stock options outstanding and stock options exercisable
Range of Exercise Price, Minimum	$ 10.55
Range of Exercise Price, Maximum	$ 14.96
Options Outstanding, Options	2,030,550
Options Outstanding, Weighted Average Exercise Price	$ 12.07
Options Outstanding, Weighted Average Remaining Contractual Life	6 years 7 months 6 days
Options Exercisable, Options	1,595,552
Options Exercisable, Weighted Average Exercise Price	$ 12.34
$14.97 to $20.08
Stock options outstanding and stock options exercisable
Range of Exercise Price, Minimum	$ 14.97
Range of Exercise Price, Maximum	$ 20.08
Options Outstanding, Options	2,211,772
Options Outstanding, Weighted Average Exercise Price	$ 17.69
Options Outstanding, Weighted Average Remaining Contractual Life	6 years 3 months 18 days
Options Exercisable, Options	2,211,772
Options Exercisable, Weighted Average Exercise Price	$ 17.69
$20.09 to $33.92
Stock options outstanding and stock options exercisable
Range of Exercise Price, Minimum	$ 20.09
Range of Exercise Price, Maximum	$ 33.92
Options Outstanding, Options	2,024,721
Options Outstanding, Weighted Average Exercise Price	$ 27.35
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 1 month 6 days
Options Exercisable, Options	2,024,721
Options Exercisable, Weighted Average Exercise Price	$ 27.35
$33.93 to $69.63
Stock options outstanding and stock options exercisable
Range of Exercise Price, Minimum	$ 33.93
Range of Exercise Price, Maximum	$ 69.63
Options Outstanding, Options	2,133,505
Options Outstanding, Weighted Average Exercise Price	$ 39.81
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 4 months 24 days
Options Exercisable, Options	2,133,505
Options Exercisable, Weighted Average Exercise Price	$ 39.81
$ 6.32 to $69.63
Stock options outstanding and stock options exercisable
Range of Exercise Price, Minimum	$ 6.92
Range of Exercise Price, Maximum	$ 69.63
Options Outstanding, Options	10,105,546
Options Outstanding, Weighted Average Exercise Price	$ 21.27
Options Outstanding, Weighted Average Remaining Contractual Life	6 years 3 months 18 days
Options Exercisable, Options	8,533,224
Options Exercisable, Weighted Average Exercise Price	$ 23.76
Options Exercisable, Weighted Average Remaining Contractual Life	5 years 10 months 24 days

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

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- Definition

Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c)

-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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ 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 (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(a, b)

-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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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

+ Details

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

+ Details

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