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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate 35.00% 35.00%  
Continuing operations $ (5.6) $ 22.9  
Discontinued operations 0 0.2  
Total tax benefit (5.6) 23.1  
Continuing operations effective tax rate (28.00%) 26.00%  
Discontinued operation effective tax rate 35.00% 35.00%  
Total effective tax rate (28.00%) 26.00%  
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost 13.2    
Payment of long-term deposit     $ (17.1)