Summary of Significant Accounting Policies Intangibles (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 88.2	$ 83.3
Finite-Lived Intangible Assets, Accumulated Amortization	(21.5)	(17.6)
Product Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	48.9	48.9
Finite-Lived Intangible Assets, Accumulated Amortization	$ (13.5)	(11.0)
Key Money Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	39 years
Finite-Lived Intangible Assets, Gross	$ 36.8	31.9
Finite-Lived Intangible Assets, Accumulated Amortization	(5.5)	(4.1)
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2.5	2.5
Finite-Lived Intangible Assets, Accumulated Amortization	$ (2.5)	$ (2.5)
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years