Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
May 31, 2017	Feb. 28, 2017
Accounting Standards Update 2016-09 [Member] \| New Accounting Pronouncement, Early Adoption, Effect [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Excess tax benefit	$ 0.1	$ 0.7

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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