CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 273.9	$ 233.8	$ 434.4	$ 434.3
Foreign currency translation adjustments	(1.3)	8.0	(5.2)	5.0
Total comprehensive income	$ 272.6	$ 241.8	$ 429.2	$ 439.3