Summary of Significant Accounting Policies - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 38.7	$ 39.1
Translation	(0.3)	(0.4)
Goodwill, ending balance	38.4	38.7
Americas
Goodwill [Roll Forward]
Goodwill, beginning balance	12.1	12.2
Translation	(0.1)	(0.1)
Goodwill, ending balance	12.0	12.1
Asia-Pacific
Goodwill [Roll Forward]
Goodwill, beginning balance	0.3	0.3
Translation	0.0	0.0
Goodwill, ending balance	0.3	0.3
Japan
Goodwill [Roll Forward]
Goodwill, beginning balance	1.0	1.0
Translation	(0.1)	0.0
Goodwill, ending balance	0.9	1.0
Europe
Goodwill [Roll Forward]
Goodwill, beginning balance	1.1	1.1
Translation	0.0	0.0
Goodwill, ending balance	1.1	1.1
Other
Goodwill [Roll Forward]
Goodwill, beginning balance	24.2	24.5
Translation	(0.1)	(0.3)
Goodwill, ending balance	$ 24.1	$ 24.2