CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Income Statement [Abstract]
Net sales	$ 1,033.2	$ 899.6
Cost of sales	382.3	340.5
Gross profit	650.9	559.1
Selling, general and administrative expenses	446.6	409.5
Earnings from operations	204.3	149.6
Interest expense and financing costs	9.9	10.6
Other expense, net	3.9	2.9
Earnings from operations before income taxes	190.5	136.1
Provision for income taxes	48.2	43.2
Net earnings	$ 142.3	$ 92.9
Net earnings per share:
Basic	$ 1.14	$ 0.75
Diluted	$ 1.14	$ 0.74
Weighted-average number of common shares:
Basic	124.4	124.6
Diluted	125.0	125.3