Identifiable Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
	Nov. 30, 2017	Feb. 28, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount for trademarks with an indefinite estimated useful life	$ 11.7	$ 10.9
Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Total identified intangible assets, useful life (in years)	2 years
Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Total identified intangible assets, useful life (in years)	10 years