Earnings (loss) per common share (EPS) - Schedule of Basic Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 30, 2021	Oct. 31, 2020	Oct. 30, 2021	Oct. 31, 2020
EPS – basic
Net income (loss) attributable to common shareholders	$ 83.9	$ 0.9	$ 429.7	$ (294.4)
Basic weighted average common shares outstanding (shares)	52.9	52.1	52.6	51.9
EPS – basic (usd per share)	$ 1.59	$ 0.02	$ 8.17	$ (5.67)