Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details Textual)

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Income Taxes (Details Textual) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Aug. 31, 2013
Aug. 31, 2012
Aug. 31, 2013
Aug. 31, 2012
Jun. 07, 2013
Income Tax Disclosure [Abstract]          
Effective tax rate 4.10% 14.90% 5.70% 24.30%  
Preexisting equity interest         50.00%
Gain on remeasurement to fair value of preexisting equity interest $ 1,642.0 $ 0 $ 1,642.0 $ 0  
Recognition of tax benefits due to resolution of certain tax positions 6.6   6.6    
Impairment of goodwill $ 283.6   $ 283.6