Summary of Significant Accounting Policies Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 38.4	$ 38.5
Goodwill, Translation Adjustments	0.7	(0.1)
Goodwill, ending balance	39.1	38.4
Americas [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	12.1	12.2
Goodwill, Translation Adjustments	0.1	(0.1)
Goodwill, ending balance	12.2	12.1
Asia-Pacific [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	0.3	0.3
Goodwill, Translation Adjustments	0.0	0.0
Goodwill, ending balance	0.3	0.3
Japan [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	1.0	1.1
Goodwill, Translation Adjustments	0.0	(0.1)
Goodwill, ending balance	1.0	1.0
Europe [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	1.1	1.0
Goodwill, Translation Adjustments	0.0	0.1
Goodwill, ending balance	1.1	1.1
Other [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	23.9	23.9
Goodwill, Translation Adjustments	0.6	0.0
Goodwill, ending balance	$ 24.5	$ 23.9