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Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended
May 31, 2019
May 31, 2018
Income Tax Disclosure [Abstract]    
Unrecognized tax benefits, reduction resulting from lapse of applicable statute of limitations   $ 0.8
Income tax expense (benefit) as a percent of income before income taxes 7.60% 6.20%
Tax benefit recorded related to the recognition of excess tax benefits from share-based compensation $ 0.7 $ 0.3
Expense for remeasurement of deferred taxes 1.7  
Unrecognized tax benefit from favorable resolution of uncertain tax position $ 2.8