CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parentheticals) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Statement of Comprehensive Income [Abstract]
Net gain (loss) on derivative instruments, tax	$ (0.7)	$ 1.1	$ (0.5)
Change in net unrealized (loss) gain on available-for-sale securities, tax	(0.2)	0.3	(0.6)
Change in unfunded portion of pension plans, tax	1.8	0.6	0.4
Net change in cumulative foreign currency translation gain (loss), tax	$ 4.9	$ 2.1	$ 2.1