CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Income Statement [Abstract]
Net sales	$ 4,169.8	$ 4,001.8	$ 4,104.9
Cost of sales	1,565.1	1,511.5	1,613.6
Gross profit	2,604.7	2,490.3	2,491.3
Selling, general and administrative expenses	1,810.2	1,769.1	1,731.2
Earnings from operations	794.5	721.2	760.1
Interest expense and financing costs	42.0	46.0	49.0
Other (income) expense, net	(8.0)	(1.4)	1.2
Earnings from operations before income taxes	760.5	676.6	709.9
Provision for income taxes	390.4	230.5	246.0
Net earnings	$ 370.1	$ 446.1	$ 463.9
Net earnings per share:
Basic	$ 2.97	$ 3.57	$ 3.61
Diluted	$ 2.96	$ 3.55	$ 3.59
Weighted-average number of common shares:
Basic	124.5	125.1	128.6
Diluted	125.1	125.5	129.1