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PROVISION FOR INCOME TAXES (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
May 31, 2013
Feb. 28, 2013
May 31, 2012
May 31, 2013
May 31, 2012
Income Taxes [Line Items]          
Effective tax rate 26.00%   21.00% 14.00% 18.00%
Income tax reconciliation, reconciling items   $ 1.4      
Tax expense to adjust taxes provided for the prior year 1.8 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% 16.00%
Increase in gross unrecognized tax benefits 3.6        
Gross unrecognized tax benefits 61.2     61.2  
Amount of unrecognized tax benefit that would benefit tax expense if realized 43.7     43.7  
State
         
Income Taxes [Line Items]          
Research and development credit carryforward       13.5  
Operating loss carryforwards $ 6.2     $ 6.2