Debt Short-term Debt Table (Details) - USD ($) $ in Millions	Apr. 30, 2016	Jan. 31, 2016	Apr. 30, 2015
Short-term Debt [Line Items]
Short-term borrowings	$ 220.1	$ 221.6	$ 197.1
Credit Facilities [Member]
Short-term Debt [Line Items]
Short-term borrowings	77.3	76.6	66.3
Other Credit Facilities [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 142.8	$ 145.0	$ 130.8