Debt - Schedule of Short-term Debt (Details) - USD ($) $ in Millions	Oct. 31, 2017	Jan. 31, 2017	Oct. 31, 2016
Short-term Debt [Line Items]
Short-term borrowings	$ 193.2	$ 228.7	$ 219.5
New Credit Facilities [Member]
Short-term Debt [Line Items]
Short-term borrowings	58.8	93.0	82.5
Commercial Paper [Member]
Short-term Debt [Line Items]
Short-term borrowings	43.0	0.0	0.0
Other Credit Facilities [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 91.4	$ 135.7	$ 137.0