CONSOLIDATED STATEMENTS OF OPERATIONS (Parentheticals) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Income Statement [Abstract]
Cost of sales, related parties	$ 54.8	$ 171.5	$ 176.8
Selling, general and administrative expenses, related parties	$ (0.2)	$ (0.7)	$ 0.8