PROVISION FOR INCOME TAXES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Feb. 28, 2013	Feb. 28, 2012
Income Taxes [Line Items]
Effective tax rate	(1.00%)	14.00%
Income tax reconciliation, reconciling items	$ 1.4
Tax expense to adjust taxes provided for the prior year	1.8
Reinstatement of tax credits for research	3.3
Tax benefit primarily related to expiration of statute of limitation		1.8
Forecasted annual tax rate	14.00%	21.00%
Increase in gross unrecognized tax benefits	2.1
Gross unrecognized tax benefits	56.6
Amount of unrecognized tax benefit that would benefit tax expense if realized	39.1
State
Income Taxes [Line Items]
Research and development credit carryforward	13.5
Operating loss carryforwards	$ 6.3

Forecasted Annual Tax Rate

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Income Tax Reconciliation, Reinstatement of Credits for Research

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Research And Development Credit Carryforward

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- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The sum of other amounts reflected in the reconciliation of the statutory tax provision (benefit) to the actual tax provision (benefit).

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the current period and the expected income tax expense or benefit computed attributable to revisions of previously reported income tax expense.

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The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws.

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The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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The gross amount of increases in unrecognized tax benefits resulting from settlements with taxing authorities.

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The net amount of all increases and decreases in unrecognized tax benefits for the period.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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