Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details Textual)

v3.8.0.1
Income Taxes (Details Textual) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Feb. 28, 2018
Aug. 31, 2015
Feb. 28, 2018
Feb. 28, 2017
Feb. 29, 2016
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]          
Unrecognized tax benefit liabilities $ 93.7   $ 93.7 $ 42.7  
Unrecognized tax benefits that would impact effective tax rate if recognized 89.3   89.3 39.5  
Tax benefits related to resolution of certain tax positions and expiration of statutes of limitations   $ (31.9)     $ (51.0)
Provisional net income tax benefit from TCJ Act (363.0)   (363.0) 0.0 $ 0.0
Benefit from remeasurement of deferred tax assets and liabilities to new rate     (323.0)    
Benefit from reversal of deferred tax liabilities previously provided for unremitted earnings of foreign subsidiaries     (220.0)    
Transition tax provision on unremitted earnings of foreign subsidiaries     180.0    
Undistributed earnings of foreign subsidiaries expected to be indefinitely reinvested       $ 420.0  
Operating loss carryforwards 307.2   307.2    
Operating loss carryforwards subject to expiration 216.7   216.7    
Operating loss carryforwards not subject to expiration 90.5   90.5    
Federal capital losses subject to expiration 269.5   269.5    
Minimum [Member]          
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]          
Estimate of change in unrecognized tax benefit liability reasonably possible as a result of examination or expiration of statutes of limitation 1.0   1.0    
Maximum [Member]          
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]          
Estimate of change in unrecognized tax benefit liability reasonably possible as a result of examination or expiration of statutes of limitation $ 79.0   $ 79.0