Other Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions		12 Months Ended
	Oct. 10, 2018	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2017
Schedule Of Commitments And Contingencies [Line Items]
Rent expensed for continuing operations		$ 5.0	$ 6.0	$ 8.3
Sublease income		$ 0.2	$ 0.1	$ 0.3
INIC Suit
Schedule Of Commitments And Contingencies [Line Items]
Litigation award subject to appeal	$ 3.5