Earnings (loss) per common share (EPS) - Schedule of Diluted 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)
Add: Dividends on Preferred Shares	8.7	0.0	25.9	0.0
Numerator for diluted EPS	$ 92.6	$ 0.9	$ 455.6	$ (294.4)
EPS – diluted
Basic weighted average common shares outstanding (shares)	52.9	52.1	52.6	51.9
Plus: Dilutive effect of share awards	2.8	1.3	2.1	0.0
Plus: Dilutive effect of Preferred Shares	8.0	0.0	8.0	0.0
Diluted weighted average common shares outstanding (shares)	63.7	53.4	62.7	51.9
EPS – diluted (usd per share)	$ 1.45	$ 0.02	$ 7.27	$ (5.67)