Debt Short-term Debt Table (Details) - USD ($) $ in Millions	Jan. 31, 2016	Jan. 31, 2015
Short-term Debt [Line Items]
Short-term borrowings	$ 221.6	$ 234.0
New Credit Facilities [Member]
Short-term Debt [Line Items]
Short-term borrowings	76.6	92.5
Other Credit Facilities [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 145.0	$ 141.5