Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Financial Information (Unaudited) (Details 1)

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Selected Quarterly Financial Information (Unaudited) (Details 1) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Feb. 29, 2012
Nov. 30, 2011
Aug. 31, 2011
May 31, 2011
Feb. 28, 2011
Nov. 30, 2010
Aug. 31, 2010
May 31, 2010
Feb. 29, 2012
Feb. 28, 2011
Summary of net of income tax effect                    
Accelerated depreciation     $ 0.1 $ 0.1 $ 0.4 $ 0.3 $ 0.1 $ 0.6 $ 0.2 $ 1.4
Net losses (gains) on acquisition of Ruffino (excluding gain on obligation from put option of Ruffino shareholder) and related activities 0.4 (6.8) (0.1) 2.2         (4.3)  
(Gain) loss on obligation from put option of Ruffino shareholder   (2.5)     60.0       (2.5) 60.0
Other cost of product sold costs           0.1       0.1
Net (gains) losses on CWAE Divestiture and related activities 3.5 2.8 0.3 (0.4) (281.5)       6.2 (281.5)
Other selling, general and administrative costs (0.8) 1.4 2.0 0.6 0.7 (1.3) 2.1 (0.3) 3.2 1.2
Impairment of intangible assets 28.6       11.4 4.2     28.6 15.6
Restructuring charges 2.8 0.6 (0.2) 7.1 3.5 (1.4) 13.2 4.3 10.3 19.6
Other equity method investment loss             0.1 0.5   0.6
Deferred tax assets valuation allowance             $ 2.0 $ 28.1   $ 30.1
Selected Quarterly Financial Information (Unaudited) (Textual)                    
Percentage of shareholder of Ruffino exercising its option to put its entire equity interest in Ruffino to the Company         50.10%         50.10%