Revenue and Segment Disclosures Revenue classified by timing of recognition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Revenue classified by timing of recognition [Line Items]
Revenues	$ 184.0	$ 218.0	$ 533.0	$ 683.0
Products and services transferred over time
Revenue classified by timing of recognition [Line Items]
Revenues	111.0	121.0	324.0	362.0
Products and services transferred at a point in time
Revenue classified by timing of recognition [Line Items]
Revenues	$ 73.0	$ 97.0	$ 209.0	$ 321.0